mirror of
https://github.com/python/cpython.git
synced 2024-11-24 18:34:43 +08:00
2577 lines
65 KiB
C
2577 lines
65 KiB
C
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/* interpreters module */
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/* low-level access to interpreter primitives */
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#include "Python.h"
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#include "frameobject.h"
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#include "interpreteridobject.h"
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static char *
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_copy_raw_string(PyObject *strobj)
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{
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const char *str = PyUnicode_AsUTF8(strobj);
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if (str == NULL) {
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return NULL;
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}
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char *copied = PyMem_Malloc(strlen(str)+1);
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if (copied == NULL) {
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PyErr_NoMemory();
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return NULL;
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}
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strcpy(copied, str);
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return copied;
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}
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static PyInterpreterState *
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_get_current(void)
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{
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// _PyInterpreterState_Get() aborts if lookup fails, so don't need
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// to check the result for NULL.
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return _PyInterpreterState_Get();
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}
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/* data-sharing-specific code ***********************************************/
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struct _sharednsitem {
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char *name;
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_PyCrossInterpreterData data;
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};
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static void _sharednsitem_clear(struct _sharednsitem *); // forward
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static int
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_sharednsitem_init(struct _sharednsitem *item, PyObject *key, PyObject *value)
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{
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item->name = _copy_raw_string(key);
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if (item->name == NULL) {
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return -1;
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}
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if (_PyObject_GetCrossInterpreterData(value, &item->data) != 0) {
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_sharednsitem_clear(item);
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return -1;
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}
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return 0;
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}
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static void
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_sharednsitem_clear(struct _sharednsitem *item)
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{
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if (item->name != NULL) {
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PyMem_Free(item->name);
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item->name = NULL;
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}
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_PyCrossInterpreterData_Release(&item->data);
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}
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static int
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_sharednsitem_apply(struct _sharednsitem *item, PyObject *ns)
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{
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PyObject *name = PyUnicode_FromString(item->name);
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if (name == NULL) {
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return -1;
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}
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PyObject *value = _PyCrossInterpreterData_NewObject(&item->data);
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if (value == NULL) {
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Py_DECREF(name);
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return -1;
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}
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int res = PyDict_SetItem(ns, name, value);
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Py_DECREF(name);
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Py_DECREF(value);
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return res;
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}
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typedef struct _sharedns {
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Py_ssize_t len;
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struct _sharednsitem* items;
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} _sharedns;
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static _sharedns *
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_sharedns_new(Py_ssize_t len)
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{
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_sharedns *shared = PyMem_NEW(_sharedns, 1);
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if (shared == NULL) {
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PyErr_NoMemory();
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return NULL;
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}
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shared->len = len;
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shared->items = PyMem_NEW(struct _sharednsitem, len);
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if (shared->items == NULL) {
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PyErr_NoMemory();
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PyMem_Free(shared);
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return NULL;
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}
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return shared;
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}
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static void
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_sharedns_free(_sharedns *shared)
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{
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for (Py_ssize_t i=0; i < shared->len; i++) {
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_sharednsitem_clear(&shared->items[i]);
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}
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PyMem_Free(shared->items);
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PyMem_Free(shared);
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}
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static _sharedns *
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_get_shared_ns(PyObject *shareable)
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{
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if (shareable == NULL || shareable == Py_None) {
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return NULL;
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}
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Py_ssize_t len = PyDict_Size(shareable);
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if (len == 0) {
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return NULL;
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}
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_sharedns *shared = _sharedns_new(len);
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if (shared == NULL) {
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return NULL;
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}
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Py_ssize_t pos = 0;
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for (Py_ssize_t i=0; i < len; i++) {
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PyObject *key, *value;
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if (PyDict_Next(shareable, &pos, &key, &value) == 0) {
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break;
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}
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if (_sharednsitem_init(&shared->items[i], key, value) != 0) {
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break;
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}
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}
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if (PyErr_Occurred()) {
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_sharedns_free(shared);
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return NULL;
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}
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return shared;
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}
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static int
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_sharedns_apply(_sharedns *shared, PyObject *ns)
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{
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for (Py_ssize_t i=0; i < shared->len; i++) {
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if (_sharednsitem_apply(&shared->items[i], ns) != 0) {
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return -1;
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}
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}
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return 0;
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}
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// Ultimately we'd like to preserve enough information about the
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// exception and traceback that we could re-constitute (or at least
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// simulate, a la traceback.TracebackException), and even chain, a copy
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// of the exception in the calling interpreter.
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typedef struct _sharedexception {
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char *name;
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char *msg;
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} _sharedexception;
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static _sharedexception *
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_sharedexception_new(void)
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{
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_sharedexception *err = PyMem_NEW(_sharedexception, 1);
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if (err == NULL) {
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PyErr_NoMemory();
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return NULL;
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}
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err->name = NULL;
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err->msg = NULL;
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return err;
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}
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static void
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_sharedexception_clear(_sharedexception *exc)
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{
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if (exc->name != NULL) {
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PyMem_Free(exc->name);
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}
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if (exc->msg != NULL) {
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PyMem_Free(exc->msg);
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}
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}
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static void
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_sharedexception_free(_sharedexception *exc)
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{
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_sharedexception_clear(exc);
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PyMem_Free(exc);
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}
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static _sharedexception *
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_sharedexception_bind(PyObject *exctype, PyObject *exc, PyObject *tb)
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{
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assert(exctype != NULL);
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char *failure = NULL;
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_sharedexception *err = _sharedexception_new();
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if (err == NULL) {
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goto finally;
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}
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PyObject *name = PyUnicode_FromFormat("%S", exctype);
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if (name == NULL) {
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failure = "unable to format exception type name";
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goto finally;
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}
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err->name = _copy_raw_string(name);
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Py_DECREF(name);
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if (err->name == NULL) {
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if (PyErr_ExceptionMatches(PyExc_MemoryError)) {
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failure = "out of memory copying exception type name";
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}
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failure = "unable to encode and copy exception type name";
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goto finally;
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}
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if (exc != NULL) {
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PyObject *msg = PyUnicode_FromFormat("%S", exc);
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if (msg == NULL) {
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failure = "unable to format exception message";
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goto finally;
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}
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err->msg = _copy_raw_string(msg);
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Py_DECREF(msg);
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if (err->msg == NULL) {
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if (PyErr_ExceptionMatches(PyExc_MemoryError)) {
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failure = "out of memory copying exception message";
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}
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failure = "unable to encode and copy exception message";
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goto finally;
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}
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}
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finally:
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if (failure != NULL) {
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PyErr_Clear();
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if (err->name != NULL) {
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PyMem_Free(err->name);
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err->name = NULL;
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}
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err->msg = failure;
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}
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return err;
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}
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static void
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_sharedexception_apply(_sharedexception *exc, PyObject *wrapperclass)
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{
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if (exc->name != NULL) {
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if (exc->msg != NULL) {
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PyErr_Format(wrapperclass, "%s: %s", exc->name, exc->msg);
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}
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else {
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PyErr_SetString(wrapperclass, exc->name);
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}
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}
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else if (exc->msg != NULL) {
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PyErr_SetString(wrapperclass, exc->msg);
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}
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else {
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PyErr_SetNone(wrapperclass);
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}
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}
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/* channel-specific code ****************************************************/
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#define CHANNEL_SEND 1
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#define CHANNEL_BOTH 0
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#define CHANNEL_RECV -1
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static PyObject *ChannelError;
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static PyObject *ChannelNotFoundError;
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static PyObject *ChannelClosedError;
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static PyObject *ChannelEmptyError;
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static PyObject *ChannelNotEmptyError;
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static int
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channel_exceptions_init(PyObject *ns)
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{
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// XXX Move the exceptions into per-module memory?
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// A channel-related operation failed.
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ChannelError = PyErr_NewException("_xxsubinterpreters.ChannelError",
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PyExc_RuntimeError, NULL);
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if (ChannelError == NULL) {
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return -1;
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}
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if (PyDict_SetItemString(ns, "ChannelError", ChannelError) != 0) {
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return -1;
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}
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// An operation tried to use a channel that doesn't exist.
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ChannelNotFoundError = PyErr_NewException(
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"_xxsubinterpreters.ChannelNotFoundError", ChannelError, NULL);
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if (ChannelNotFoundError == NULL) {
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return -1;
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}
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if (PyDict_SetItemString(ns, "ChannelNotFoundError", ChannelNotFoundError) != 0) {
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return -1;
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}
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// An operation tried to use a closed channel.
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ChannelClosedError = PyErr_NewException(
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"_xxsubinterpreters.ChannelClosedError", ChannelError, NULL);
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if (ChannelClosedError == NULL) {
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return -1;
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}
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if (PyDict_SetItemString(ns, "ChannelClosedError", ChannelClosedError) != 0) {
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return -1;
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}
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// An operation tried to pop from an empty channel.
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ChannelEmptyError = PyErr_NewException(
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"_xxsubinterpreters.ChannelEmptyError", ChannelError, NULL);
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if (ChannelEmptyError == NULL) {
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return -1;
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}
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if (PyDict_SetItemString(ns, "ChannelEmptyError", ChannelEmptyError) != 0) {
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return -1;
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}
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// An operation tried to close a non-empty channel.
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ChannelNotEmptyError = PyErr_NewException(
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"_xxsubinterpreters.ChannelNotEmptyError", ChannelError, NULL);
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if (ChannelNotEmptyError == NULL) {
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return -1;
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}
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if (PyDict_SetItemString(ns, "ChannelNotEmptyError", ChannelNotEmptyError) != 0) {
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return -1;
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}
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return 0;
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}
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/* the channel queue */
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struct _channelitem;
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typedef struct _channelitem {
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_PyCrossInterpreterData *data;
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struct _channelitem *next;
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} _channelitem;
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static _channelitem *
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_channelitem_new(void)
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{
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_channelitem *item = PyMem_NEW(_channelitem, 1);
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if (item == NULL) {
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PyErr_NoMemory();
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return NULL;
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}
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item->data = NULL;
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item->next = NULL;
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return item;
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}
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static void
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_channelitem_clear(_channelitem *item)
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{
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if (item->data != NULL) {
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_PyCrossInterpreterData_Release(item->data);
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PyMem_Free(item->data);
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item->data = NULL;
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}
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item->next = NULL;
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}
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static void
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_channelitem_free(_channelitem *item)
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{
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_channelitem_clear(item);
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PyMem_Free(item);
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}
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static void
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_channelitem_free_all(_channelitem *item)
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{
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while (item != NULL) {
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_channelitem *last = item;
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item = item->next;
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_channelitem_free(last);
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}
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}
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static _PyCrossInterpreterData *
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_channelitem_popped(_channelitem *item)
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{
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_PyCrossInterpreterData *data = item->data;
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item->data = NULL;
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_channelitem_free(item);
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return data;
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}
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typedef struct _channelqueue {
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int64_t count;
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_channelitem *first;
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_channelitem *last;
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} _channelqueue;
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static _channelqueue *
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_channelqueue_new(void)
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{
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_channelqueue *queue = PyMem_NEW(_channelqueue, 1);
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if (queue == NULL) {
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PyErr_NoMemory();
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return NULL;
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}
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queue->count = 0;
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queue->first = NULL;
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queue->last = NULL;
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return queue;
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}
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|
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static void
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_channelqueue_clear(_channelqueue *queue)
|
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{
|
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_channelitem_free_all(queue->first);
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queue->count = 0;
|
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queue->first = NULL;
|
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queue->last = NULL;
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}
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|
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static void
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_channelqueue_free(_channelqueue *queue)
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{
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_channelqueue_clear(queue);
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PyMem_Free(queue);
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}
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static int
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_channelqueue_put(_channelqueue *queue, _PyCrossInterpreterData *data)
|
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{
|
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_channelitem *item = _channelitem_new();
|
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if (item == NULL) {
|
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return -1;
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}
|
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item->data = data;
|
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|
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queue->count += 1;
|
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if (queue->first == NULL) {
|
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queue->first = item;
|
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}
|
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else {
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queue->last->next = item;
|
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}
|
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queue->last = item;
|
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return 0;
|
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}
|
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|
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static _PyCrossInterpreterData *
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_channelqueue_get(_channelqueue *queue)
|
|
{
|
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_channelitem *item = queue->first;
|
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if (item == NULL) {
|
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return NULL;
|
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}
|
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queue->first = item->next;
|
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if (queue->last == item) {
|
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queue->last = NULL;
|
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}
|
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queue->count -= 1;
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|
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return _channelitem_popped(item);
|
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}
|
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|
|
/* channel-interpreter associations */
|
|
|
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struct _channelend;
|
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|
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typedef struct _channelend {
|
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struct _channelend *next;
|
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int64_t interp;
|
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int open;
|
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} _channelend;
|
|
|
|
static _channelend *
|
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_channelend_new(int64_t interp)
|
|
{
|
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_channelend *end = PyMem_NEW(_channelend, 1);
|
|
if (end == NULL) {
|
|
PyErr_NoMemory();
|
|
return NULL;
|
|
}
|
|
end->next = NULL;
|
|
end->interp = interp;
|
|
end->open = 1;
|
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return end;
|
|
}
|
|
|
|
static void
|
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_channelend_free(_channelend *end)
|
|
{
|
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PyMem_Free(end);
|
|
}
|
|
|
|
static void
|
|
_channelend_free_all(_channelend *end)
|
|
{
|
|
while (end != NULL) {
|
|
_channelend *last = end;
|
|
end = end->next;
|
|
_channelend_free(last);
|
|
}
|
|
}
|
|
|
|
static _channelend *
|
|
_channelend_find(_channelend *first, int64_t interp, _channelend **pprev)
|
|
{
|
|
_channelend *prev = NULL;
|
|
_channelend *end = first;
|
|
while (end != NULL) {
|
|
if (end->interp == interp) {
|
|
break;
|
|
}
|
|
prev = end;
|
|
end = end->next;
|
|
}
|
|
if (pprev != NULL) {
|
|
*pprev = prev;
|
|
}
|
|
return end;
|
|
}
|
|
|
|
typedef struct _channelassociations {
|
|
// Note that the list entries are never removed for interpreter
|
|
// for which the channel is closed. This should be a problem in
|
|
// practice. Also, a channel isn't automatically closed when an
|
|
// interpreter is destroyed.
|
|
int64_t numsendopen;
|
|
int64_t numrecvopen;
|
|
_channelend *send;
|
|
_channelend *recv;
|
|
} _channelends;
|
|
|
|
static _channelends *
|
|
_channelends_new(void)
|
|
{
|
|
_channelends *ends = PyMem_NEW(_channelends, 1);
|
|
if (ends== NULL) {
|
|
return NULL;
|
|
}
|
|
ends->numsendopen = 0;
|
|
ends->numrecvopen = 0;
|
|
ends->send = NULL;
|
|
ends->recv = NULL;
|
|
return ends;
|
|
}
|
|
|
|
static void
|
|
_channelends_clear(_channelends *ends)
|
|
{
|
|
_channelend_free_all(ends->send);
|
|
ends->send = NULL;
|
|
ends->numsendopen = 0;
|
|
|
|
_channelend_free_all(ends->recv);
|
|
ends->recv = NULL;
|
|
ends->numrecvopen = 0;
|
|
}
|
|
|
|
static void
|
|
_channelends_free(_channelends *ends)
|
|
{
|
|
_channelends_clear(ends);
|
|
PyMem_Free(ends);
|
|
}
|
|
|
|
static _channelend *
|
|
_channelends_add(_channelends *ends, _channelend *prev, int64_t interp,
|
|
int send)
|
|
{
|
|
_channelend *end = _channelend_new(interp);
|
|
if (end == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
if (prev == NULL) {
|
|
if (send) {
|
|
ends->send = end;
|
|
}
|
|
else {
|
|
ends->recv = end;
|
|
}
|
|
}
|
|
else {
|
|
prev->next = end;
|
|
}
|
|
if (send) {
|
|
ends->numsendopen += 1;
|
|
}
|
|
else {
|
|
ends->numrecvopen += 1;
|
|
}
|
|
return end;
|
|
}
|
|
|
|
static int
|
|
_channelends_associate(_channelends *ends, int64_t interp, int send)
|
|
{
|
|
_channelend *prev;
|
|
_channelend *end = _channelend_find(send ? ends->send : ends->recv,
|
|
interp, &prev);
|
|
if (end != NULL) {
|
|
if (!end->open) {
|
|
PyErr_SetString(ChannelClosedError, "channel already closed");
|
|
return -1;
|
|
}
|
|
// already associated
|
|
return 0;
|
|
}
|
|
if (_channelends_add(ends, prev, interp, send) == NULL) {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
_channelends_is_open(_channelends *ends)
|
|
{
|
|
if (ends->numsendopen != 0 || ends->numrecvopen != 0) {
|
|
return 1;
|
|
}
|
|
if (ends->send == NULL && ends->recv == NULL) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_channelends_close_end(_channelends *ends, _channelend *end, int send)
|
|
{
|
|
end->open = 0;
|
|
if (send) {
|
|
ends->numsendopen -= 1;
|
|
}
|
|
else {
|
|
ends->numrecvopen -= 1;
|
|
}
|
|
}
|
|
|
|
static int
|
|
_channelends_close_interpreter(_channelends *ends, int64_t interp, int which)
|
|
{
|
|
_channelend *prev;
|
|
_channelend *end;
|
|
if (which >= 0) { // send/both
|
|
end = _channelend_find(ends->send, interp, &prev);
|
|
if (end == NULL) {
|
|
// never associated so add it
|
|
end = _channelends_add(ends, prev, interp, 1);
|
|
if (end == NULL) {
|
|
return -1;
|
|
}
|
|
}
|
|
_channelends_close_end(ends, end, 1);
|
|
}
|
|
if (which <= 0) { // recv/both
|
|
end = _channelend_find(ends->recv, interp, &prev);
|
|
if (end == NULL) {
|
|
// never associated so add it
|
|
end = _channelends_add(ends, prev, interp, 0);
|
|
if (end == NULL) {
|
|
return -1;
|
|
}
|
|
}
|
|
_channelends_close_end(ends, end, 0);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
_channelends_close_all(_channelends *ends, int which, int force)
|
|
{
|
|
// XXX Handle the ends.
|
|
// XXX Handle force is True.
|
|
|
|
// Ensure all the "send"-associated interpreters are closed.
|
|
_channelend *end;
|
|
for (end = ends->send; end != NULL; end = end->next) {
|
|
_channelends_close_end(ends, end, 1);
|
|
}
|
|
|
|
// Ensure all the "recv"-associated interpreters are closed.
|
|
for (end = ends->recv; end != NULL; end = end->next) {
|
|
_channelends_close_end(ends, end, 0);
|
|
}
|
|
}
|
|
|
|
/* channels */
|
|
|
|
struct _channel;
|
|
struct _channel_closing;
|
|
static void _channel_clear_closing(struct _channel *);
|
|
static void _channel_finish_closing(struct _channel *);
|
|
|
|
typedef struct _channel {
|
|
PyThread_type_lock mutex;
|
|
_channelqueue *queue;
|
|
_channelends *ends;
|
|
int open;
|
|
struct _channel_closing *closing;
|
|
} _PyChannelState;
|
|
|
|
static _PyChannelState *
|
|
_channel_new(void)
|
|
{
|
|
_PyChannelState *chan = PyMem_NEW(_PyChannelState, 1);
|
|
if (chan == NULL) {
|
|
return NULL;
|
|
}
|
|
chan->mutex = PyThread_allocate_lock();
|
|
if (chan->mutex == NULL) {
|
|
PyMem_Free(chan);
|
|
PyErr_SetString(ChannelError,
|
|
"can't initialize mutex for new channel");
|
|
return NULL;
|
|
}
|
|
chan->queue = _channelqueue_new();
|
|
if (chan->queue == NULL) {
|
|
PyMem_Free(chan);
|
|
return NULL;
|
|
}
|
|
chan->ends = _channelends_new();
|
|
if (chan->ends == NULL) {
|
|
_channelqueue_free(chan->queue);
|
|
PyMem_Free(chan);
|
|
return NULL;
|
|
}
|
|
chan->open = 1;
|
|
chan->closing = NULL;
|
|
return chan;
|
|
}
|
|
|
|
static void
|
|
_channel_free(_PyChannelState *chan)
|
|
{
|
|
_channel_clear_closing(chan);
|
|
PyThread_acquire_lock(chan->mutex, WAIT_LOCK);
|
|
_channelqueue_free(chan->queue);
|
|
_channelends_free(chan->ends);
|
|
PyThread_release_lock(chan->mutex);
|
|
|
|
PyThread_free_lock(chan->mutex);
|
|
PyMem_Free(chan);
|
|
}
|
|
|
|
static int
|
|
_channel_add(_PyChannelState *chan, int64_t interp,
|
|
_PyCrossInterpreterData *data)
|
|
{
|
|
int res = -1;
|
|
PyThread_acquire_lock(chan->mutex, WAIT_LOCK);
|
|
|
|
if (!chan->open) {
|
|
PyErr_SetString(ChannelClosedError, "channel closed");
|
|
goto done;
|
|
}
|
|
if (_channelends_associate(chan->ends, interp, 1) != 0) {
|
|
goto done;
|
|
}
|
|
|
|
if (_channelqueue_put(chan->queue, data) != 0) {
|
|
goto done;
|
|
}
|
|
|
|
res = 0;
|
|
done:
|
|
PyThread_release_lock(chan->mutex);
|
|
return res;
|
|
}
|
|
|
|
static _PyCrossInterpreterData *
|
|
_channel_next(_PyChannelState *chan, int64_t interp)
|
|
{
|
|
_PyCrossInterpreterData *data = NULL;
|
|
PyThread_acquire_lock(chan->mutex, WAIT_LOCK);
|
|
|
|
if (!chan->open) {
|
|
PyErr_SetString(ChannelClosedError, "channel closed");
|
|
goto done;
|
|
}
|
|
if (_channelends_associate(chan->ends, interp, 0) != 0) {
|
|
goto done;
|
|
}
|
|
|
|
data = _channelqueue_get(chan->queue);
|
|
if (data == NULL && !PyErr_Occurred() && chan->closing != NULL) {
|
|
chan->open = 0;
|
|
}
|
|
|
|
done:
|
|
PyThread_release_lock(chan->mutex);
|
|
if (chan->queue->count == 0) {
|
|
_channel_finish_closing(chan);
|
|
}
|
|
return data;
|
|
}
|
|
|
|
static int
|
|
_channel_close_interpreter(_PyChannelState *chan, int64_t interp, int end)
|
|
{
|
|
PyThread_acquire_lock(chan->mutex, WAIT_LOCK);
|
|
|
|
int res = -1;
|
|
if (!chan->open) {
|
|
PyErr_SetString(ChannelClosedError, "channel already closed");
|
|
goto done;
|
|
}
|
|
|
|
if (_channelends_close_interpreter(chan->ends, interp, end) != 0) {
|
|
goto done;
|
|
}
|
|
chan->open = _channelends_is_open(chan->ends);
|
|
|
|
res = 0;
|
|
done:
|
|
PyThread_release_lock(chan->mutex);
|
|
return res;
|
|
}
|
|
|
|
static int
|
|
_channel_close_all(_PyChannelState *chan, int end, int force)
|
|
{
|
|
int res = -1;
|
|
PyThread_acquire_lock(chan->mutex, WAIT_LOCK);
|
|
|
|
if (!chan->open) {
|
|
PyErr_SetString(ChannelClosedError, "channel already closed");
|
|
goto done;
|
|
}
|
|
|
|
if (!force && chan->queue->count > 0) {
|
|
PyErr_SetString(ChannelNotEmptyError,
|
|
"may not be closed if not empty (try force=True)");
|
|
goto done;
|
|
}
|
|
|
|
chan->open = 0;
|
|
|
|
// We *could* also just leave these in place, since we've marked
|
|
// the channel as closed already.
|
|
_channelends_close_all(chan->ends, end, force);
|
|
|
|
res = 0;
|
|
done:
|
|
PyThread_release_lock(chan->mutex);
|
|
return res;
|
|
}
|
|
|
|
/* the set of channels */
|
|
|
|
struct _channelref;
|
|
|
|
typedef struct _channelref {
|
|
int64_t id;
|
|
_PyChannelState *chan;
|
|
struct _channelref *next;
|
|
Py_ssize_t objcount;
|
|
} _channelref;
|
|
|
|
static _channelref *
|
|
_channelref_new(int64_t id, _PyChannelState *chan)
|
|
{
|
|
_channelref *ref = PyMem_NEW(_channelref, 1);
|
|
if (ref == NULL) {
|
|
return NULL;
|
|
}
|
|
ref->id = id;
|
|
ref->chan = chan;
|
|
ref->next = NULL;
|
|
ref->objcount = 0;
|
|
return ref;
|
|
}
|
|
|
|
//static void
|
|
//_channelref_clear(_channelref *ref)
|
|
//{
|
|
// ref->id = -1;
|
|
// ref->chan = NULL;
|
|
// ref->next = NULL;
|
|
// ref->objcount = 0;
|
|
//}
|
|
|
|
static void
|
|
_channelref_free(_channelref *ref)
|
|
{
|
|
if (ref->chan != NULL) {
|
|
_channel_clear_closing(ref->chan);
|
|
}
|
|
//_channelref_clear(ref);
|
|
PyMem_Free(ref);
|
|
}
|
|
|
|
static _channelref *
|
|
_channelref_find(_channelref *first, int64_t id, _channelref **pprev)
|
|
{
|
|
_channelref *prev = NULL;
|
|
_channelref *ref = first;
|
|
while (ref != NULL) {
|
|
if (ref->id == id) {
|
|
break;
|
|
}
|
|
prev = ref;
|
|
ref = ref->next;
|
|
}
|
|
if (pprev != NULL) {
|
|
*pprev = prev;
|
|
}
|
|
return ref;
|
|
}
|
|
|
|
typedef struct _channels {
|
|
PyThread_type_lock mutex;
|
|
_channelref *head;
|
|
int64_t numopen;
|
|
int64_t next_id;
|
|
} _channels;
|
|
|
|
static int
|
|
_channels_init(_channels *channels)
|
|
{
|
|
if (channels->mutex == NULL) {
|
|
channels->mutex = PyThread_allocate_lock();
|
|
if (channels->mutex == NULL) {
|
|
PyErr_SetString(ChannelError,
|
|
"can't initialize mutex for channel management");
|
|
return -1;
|
|
}
|
|
}
|
|
channels->head = NULL;
|
|
channels->numopen = 0;
|
|
channels->next_id = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int64_t
|
|
_channels_next_id(_channels *channels) // needs lock
|
|
{
|
|
int64_t id = channels->next_id;
|
|
if (id < 0) {
|
|
/* overflow */
|
|
PyErr_SetString(ChannelError,
|
|
"failed to get a channel ID");
|
|
return -1;
|
|
}
|
|
channels->next_id += 1;
|
|
return id;
|
|
}
|
|
|
|
static _PyChannelState *
|
|
_channels_lookup(_channels *channels, int64_t id, PyThread_type_lock *pmutex)
|
|
{
|
|
_PyChannelState *chan = NULL;
|
|
PyThread_acquire_lock(channels->mutex, WAIT_LOCK);
|
|
if (pmutex != NULL) {
|
|
*pmutex = NULL;
|
|
}
|
|
|
|
_channelref *ref = _channelref_find(channels->head, id, NULL);
|
|
if (ref == NULL) {
|
|
PyErr_Format(ChannelNotFoundError, "channel %" PRId64 " not found", id);
|
|
goto done;
|
|
}
|
|
if (ref->chan == NULL || !ref->chan->open) {
|
|
PyErr_Format(ChannelClosedError, "channel %" PRId64 " closed", id);
|
|
goto done;
|
|
}
|
|
|
|
if (pmutex != NULL) {
|
|
// The mutex will be closed by the caller.
|
|
*pmutex = channels->mutex;
|
|
}
|
|
|
|
chan = ref->chan;
|
|
done:
|
|
if (pmutex == NULL || *pmutex == NULL) {
|
|
PyThread_release_lock(channels->mutex);
|
|
}
|
|
return chan;
|
|
}
|
|
|
|
static int64_t
|
|
_channels_add(_channels *channels, _PyChannelState *chan)
|
|
{
|
|
int64_t cid = -1;
|
|
PyThread_acquire_lock(channels->mutex, WAIT_LOCK);
|
|
|
|
// Create a new ref.
|
|
int64_t id = _channels_next_id(channels);
|
|
if (id < 0) {
|
|
goto done;
|
|
}
|
|
_channelref *ref = _channelref_new(id, chan);
|
|
if (ref == NULL) {
|
|
goto done;
|
|
}
|
|
|
|
// Add it to the list.
|
|
// We assume that the channel is a new one (not already in the list).
|
|
ref->next = channels->head;
|
|
channels->head = ref;
|
|
channels->numopen += 1;
|
|
|
|
cid = id;
|
|
done:
|
|
PyThread_release_lock(channels->mutex);
|
|
return cid;
|
|
}
|
|
|
|
/* forward */
|
|
static int _channel_set_closing(struct _channelref *, PyThread_type_lock);
|
|
|
|
static int
|
|
_channels_close(_channels *channels, int64_t cid, _PyChannelState **pchan,
|
|
int end, int force)
|
|
{
|
|
int res = -1;
|
|
PyThread_acquire_lock(channels->mutex, WAIT_LOCK);
|
|
if (pchan != NULL) {
|
|
*pchan = NULL;
|
|
}
|
|
|
|
_channelref *ref = _channelref_find(channels->head, cid, NULL);
|
|
if (ref == NULL) {
|
|
PyErr_Format(ChannelNotFoundError, "channel %" PRId64 " not found", cid);
|
|
goto done;
|
|
}
|
|
|
|
if (ref->chan == NULL) {
|
|
PyErr_Format(ChannelClosedError, "channel %" PRId64 " closed", cid);
|
|
goto done;
|
|
}
|
|
else if (!force && end == CHANNEL_SEND && ref->chan->closing != NULL) {
|
|
PyErr_Format(ChannelClosedError, "channel %" PRId64 " closed", cid);
|
|
goto done;
|
|
}
|
|
else {
|
|
if (_channel_close_all(ref->chan, end, force) != 0) {
|
|
if (end == CHANNEL_SEND &&
|
|
PyErr_ExceptionMatches(ChannelNotEmptyError)) {
|
|
if (ref->chan->closing != NULL) {
|
|
PyErr_Format(ChannelClosedError,
|
|
"channel %" PRId64 " closed", cid);
|
|
goto done;
|
|
}
|
|
// Mark the channel as closing and return. The channel
|
|
// will be cleaned up in _channel_next().
|
|
PyErr_Clear();
|
|
if (_channel_set_closing(ref, channels->mutex) != 0) {
|
|
goto done;
|
|
}
|
|
if (pchan != NULL) {
|
|
*pchan = ref->chan;
|
|
}
|
|
res = 0;
|
|
}
|
|
goto done;
|
|
}
|
|
if (pchan != NULL) {
|
|
*pchan = ref->chan;
|
|
}
|
|
else {
|
|
_channel_free(ref->chan);
|
|
}
|
|
ref->chan = NULL;
|
|
}
|
|
|
|
res = 0;
|
|
done:
|
|
PyThread_release_lock(channels->mutex);
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
_channels_remove_ref(_channels *channels, _channelref *ref, _channelref *prev,
|
|
_PyChannelState **pchan)
|
|
{
|
|
if (ref == channels->head) {
|
|
channels->head = ref->next;
|
|
}
|
|
else {
|
|
prev->next = ref->next;
|
|
}
|
|
channels->numopen -= 1;
|
|
|
|
if (pchan != NULL) {
|
|
*pchan = ref->chan;
|
|
}
|
|
_channelref_free(ref);
|
|
}
|
|
|
|
static int
|
|
_channels_remove(_channels *channels, int64_t id, _PyChannelState **pchan)
|
|
{
|
|
int res = -1;
|
|
PyThread_acquire_lock(channels->mutex, WAIT_LOCK);
|
|
|
|
if (pchan != NULL) {
|
|
*pchan = NULL;
|
|
}
|
|
|
|
_channelref *prev = NULL;
|
|
_channelref *ref = _channelref_find(channels->head, id, &prev);
|
|
if (ref == NULL) {
|
|
PyErr_Format(ChannelNotFoundError, "channel %" PRId64 " not found", id);
|
|
goto done;
|
|
}
|
|
|
|
_channels_remove_ref(channels, ref, prev, pchan);
|
|
|
|
res = 0;
|
|
done:
|
|
PyThread_release_lock(channels->mutex);
|
|
return res;
|
|
}
|
|
|
|
static int
|
|
_channels_add_id_object(_channels *channels, int64_t id)
|
|
{
|
|
int res = -1;
|
|
PyThread_acquire_lock(channels->mutex, WAIT_LOCK);
|
|
|
|
_channelref *ref = _channelref_find(channels->head, id, NULL);
|
|
if (ref == NULL) {
|
|
PyErr_Format(ChannelNotFoundError, "channel %" PRId64 " not found", id);
|
|
goto done;
|
|
}
|
|
ref->objcount += 1;
|
|
|
|
res = 0;
|
|
done:
|
|
PyThread_release_lock(channels->mutex);
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
_channels_drop_id_object(_channels *channels, int64_t id)
|
|
{
|
|
PyThread_acquire_lock(channels->mutex, WAIT_LOCK);
|
|
|
|
_channelref *prev = NULL;
|
|
_channelref *ref = _channelref_find(channels->head, id, &prev);
|
|
if (ref == NULL) {
|
|
// Already destroyed.
|
|
goto done;
|
|
}
|
|
ref->objcount -= 1;
|
|
|
|
// Destroy if no longer used.
|
|
if (ref->objcount == 0) {
|
|
_PyChannelState *chan = NULL;
|
|
_channels_remove_ref(channels, ref, prev, &chan);
|
|
if (chan != NULL) {
|
|
_channel_free(chan);
|
|
}
|
|
}
|
|
|
|
done:
|
|
PyThread_release_lock(channels->mutex);
|
|
}
|
|
|
|
static int64_t *
|
|
_channels_list_all(_channels *channels, int64_t *count)
|
|
{
|
|
int64_t *cids = NULL;
|
|
PyThread_acquire_lock(channels->mutex, WAIT_LOCK);
|
|
int64_t numopen = channels->numopen;
|
|
if (numopen >= PY_SSIZE_T_MAX) {
|
|
PyErr_SetString(PyExc_RuntimeError, "too many channels open");
|
|
goto done;
|
|
}
|
|
int64_t *ids = PyMem_NEW(int64_t, (Py_ssize_t)(channels->numopen));
|
|
if (ids == NULL) {
|
|
goto done;
|
|
}
|
|
_channelref *ref = channels->head;
|
|
for (int64_t i=0; ref != NULL; ref = ref->next, i++) {
|
|
ids[i] = ref->id;
|
|
}
|
|
*count = channels->numopen;
|
|
|
|
cids = ids;
|
|
done:
|
|
PyThread_release_lock(channels->mutex);
|
|
return cids;
|
|
}
|
|
|
|
/* support for closing non-empty channels */
|
|
|
|
struct _channel_closing {
|
|
struct _channelref *ref;
|
|
};
|
|
|
|
static int
|
|
_channel_set_closing(struct _channelref *ref, PyThread_type_lock mutex) {
|
|
struct _channel *chan = ref->chan;
|
|
if (chan == NULL) {
|
|
// already closed
|
|
return 0;
|
|
}
|
|
int res = -1;
|
|
PyThread_acquire_lock(chan->mutex, WAIT_LOCK);
|
|
if (chan->closing != NULL) {
|
|
PyErr_SetString(ChannelClosedError, "channel closed");
|
|
goto done;
|
|
}
|
|
chan->closing = PyMem_NEW(struct _channel_closing, 1);
|
|
if (chan->closing == NULL) {
|
|
goto done;
|
|
}
|
|
chan->closing->ref = ref;
|
|
|
|
res = 0;
|
|
done:
|
|
PyThread_release_lock(chan->mutex);
|
|
return res;
|
|
}
|
|
|
|
static void
|
|
_channel_clear_closing(struct _channel *chan) {
|
|
PyThread_acquire_lock(chan->mutex, WAIT_LOCK);
|
|
if (chan->closing != NULL) {
|
|
PyMem_Free(chan->closing);
|
|
chan->closing = NULL;
|
|
}
|
|
PyThread_release_lock(chan->mutex);
|
|
}
|
|
|
|
static void
|
|
_channel_finish_closing(struct _channel *chan) {
|
|
struct _channel_closing *closing = chan->closing;
|
|
if (closing == NULL) {
|
|
return;
|
|
}
|
|
_channelref *ref = closing->ref;
|
|
_channel_clear_closing(chan);
|
|
// Do the things that would have been done in _channels_close().
|
|
ref->chan = NULL;
|
|
_channel_free(chan);
|
|
}
|
|
|
|
/* "high"-level channel-related functions */
|
|
|
|
static int64_t
|
|
_channel_create(_channels *channels)
|
|
{
|
|
_PyChannelState *chan = _channel_new();
|
|
if (chan == NULL) {
|
|
return -1;
|
|
}
|
|
int64_t id = _channels_add(channels, chan);
|
|
if (id < 0) {
|
|
_channel_free(chan);
|
|
return -1;
|
|
}
|
|
return id;
|
|
}
|
|
|
|
static int
|
|
_channel_destroy(_channels *channels, int64_t id)
|
|
{
|
|
_PyChannelState *chan = NULL;
|
|
if (_channels_remove(channels, id, &chan) != 0) {
|
|
return -1;
|
|
}
|
|
if (chan != NULL) {
|
|
_channel_free(chan);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
_channel_send(_channels *channels, int64_t id, PyObject *obj)
|
|
{
|
|
PyInterpreterState *interp = _get_current();
|
|
if (interp == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
// Look up the channel.
|
|
PyThread_type_lock mutex = NULL;
|
|
_PyChannelState *chan = _channels_lookup(channels, id, &mutex);
|
|
if (chan == NULL) {
|
|
return -1;
|
|
}
|
|
// Past this point we are responsible for releasing the mutex.
|
|
|
|
if (chan->closing != NULL) {
|
|
PyErr_Format(ChannelClosedError, "channel %" PRId64 " closed", id);
|
|
PyThread_release_lock(mutex);
|
|
return -1;
|
|
}
|
|
|
|
// Convert the object to cross-interpreter data.
|
|
_PyCrossInterpreterData *data = PyMem_NEW(_PyCrossInterpreterData, 1);
|
|
if (data == NULL) {
|
|
PyThread_release_lock(mutex);
|
|
return -1;
|
|
}
|
|
if (_PyObject_GetCrossInterpreterData(obj, data) != 0) {
|
|
PyThread_release_lock(mutex);
|
|
PyMem_Free(data);
|
|
return -1;
|
|
}
|
|
|
|
// Add the data to the channel.
|
|
int res = _channel_add(chan, PyInterpreterState_GetID(interp), data);
|
|
PyThread_release_lock(mutex);
|
|
if (res != 0) {
|
|
_PyCrossInterpreterData_Release(data);
|
|
PyMem_Free(data);
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
_channel_recv(_channels *channels, int64_t id)
|
|
{
|
|
PyInterpreterState *interp = _get_current();
|
|
if (interp == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
// Look up the channel.
|
|
PyThread_type_lock mutex = NULL;
|
|
_PyChannelState *chan = _channels_lookup(channels, id, &mutex);
|
|
if (chan == NULL) {
|
|
return NULL;
|
|
}
|
|
// Past this point we are responsible for releasing the mutex.
|
|
|
|
// Pop off the next item from the channel.
|
|
_PyCrossInterpreterData *data = _channel_next(chan, PyInterpreterState_GetID(interp));
|
|
PyThread_release_lock(mutex);
|
|
if (data == NULL) {
|
|
if (!PyErr_Occurred()) {
|
|
PyErr_Format(ChannelEmptyError, "channel %" PRId64 " is empty", id);
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
// Convert the data back to an object.
|
|
PyObject *obj = _PyCrossInterpreterData_NewObject(data);
|
|
if (obj == NULL) {
|
|
return NULL;
|
|
}
|
|
_PyCrossInterpreterData_Release(data);
|
|
PyMem_Free(data);
|
|
|
|
return obj;
|
|
}
|
|
|
|
static int
|
|
_channel_drop(_channels *channels, int64_t id, int send, int recv)
|
|
{
|
|
PyInterpreterState *interp = _get_current();
|
|
if (interp == NULL) {
|
|
return -1;
|
|
}
|
|
|
|
// Look up the channel.
|
|
PyThread_type_lock mutex = NULL;
|
|
_PyChannelState *chan = _channels_lookup(channels, id, &mutex);
|
|
if (chan == NULL) {
|
|
return -1;
|
|
}
|
|
// Past this point we are responsible for releasing the mutex.
|
|
|
|
// Close one or both of the two ends.
|
|
int res = _channel_close_interpreter(chan, PyInterpreterState_GetID(interp), send-recv);
|
|
PyThread_release_lock(mutex);
|
|
return res;
|
|
}
|
|
|
|
static int
|
|
_channel_close(_channels *channels, int64_t id, int end, int force)
|
|
{
|
|
return _channels_close(channels, id, NULL, end, force);
|
|
}
|
|
|
|
/* ChannelID class */
|
|
|
|
static PyTypeObject ChannelIDtype;
|
|
|
|
typedef struct channelid {
|
|
PyObject_HEAD
|
|
int64_t id;
|
|
int end;
|
|
int resolve;
|
|
_channels *channels;
|
|
} channelid;
|
|
|
|
static channelid *
|
|
newchannelid(PyTypeObject *cls, int64_t cid, int end, _channels *channels,
|
|
int force, int resolve)
|
|
{
|
|
channelid *self = PyObject_New(channelid, cls);
|
|
if (self == NULL) {
|
|
return NULL;
|
|
}
|
|
self->id = cid;
|
|
self->end = end;
|
|
self->resolve = resolve;
|
|
self->channels = channels;
|
|
|
|
if (_channels_add_id_object(channels, cid) != 0) {
|
|
if (force && PyErr_ExceptionMatches(ChannelNotFoundError)) {
|
|
PyErr_Clear();
|
|
}
|
|
else {
|
|
Py_DECREF((PyObject *)self);
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
return self;
|
|
}
|
|
|
|
static _channels * _global_channels(void);
|
|
|
|
static PyObject *
|
|
channelid_new(PyTypeObject *cls, PyObject *args, PyObject *kwds)
|
|
{
|
|
static char *kwlist[] = {"id", "send", "recv", "force", "_resolve", NULL};
|
|
PyObject *id;
|
|
int send = -1;
|
|
int recv = -1;
|
|
int force = 0;
|
|
int resolve = 0;
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwds,
|
|
"O|$pppp:ChannelID.__new__", kwlist,
|
|
&id, &send, &recv, &force, &resolve))
|
|
return NULL;
|
|
|
|
// Coerce and check the ID.
|
|
int64_t cid;
|
|
if (PyObject_TypeCheck(id, &ChannelIDtype)) {
|
|
cid = ((channelid *)id)->id;
|
|
}
|
|
else {
|
|
cid = _Py_CoerceID(id);
|
|
if (cid < 0) {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
// Handle "send" and "recv".
|
|
if (send == 0 && recv == 0) {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"'send' and 'recv' cannot both be False");
|
|
return NULL;
|
|
}
|
|
|
|
int end = 0;
|
|
if (send == 1) {
|
|
if (recv == 0 || recv == -1) {
|
|
end = CHANNEL_SEND;
|
|
}
|
|
}
|
|
else if (recv == 1) {
|
|
end = CHANNEL_RECV;
|
|
}
|
|
|
|
return (PyObject *)newchannelid(cls, cid, end, _global_channels(),
|
|
force, resolve);
|
|
}
|
|
|
|
static void
|
|
channelid_dealloc(PyObject *v)
|
|
{
|
|
int64_t cid = ((channelid *)v)->id;
|
|
_channels *channels = ((channelid *)v)->channels;
|
|
Py_TYPE(v)->tp_free(v);
|
|
|
|
_channels_drop_id_object(channels, cid);
|
|
}
|
|
|
|
static PyObject *
|
|
channelid_repr(PyObject *self)
|
|
{
|
|
PyTypeObject *type = Py_TYPE(self);
|
|
const char *name = _PyType_Name(type);
|
|
|
|
channelid *cid = (channelid *)self;
|
|
const char *fmt;
|
|
if (cid->end == CHANNEL_SEND) {
|
|
fmt = "%s(%" PRId64 ", send=True)";
|
|
}
|
|
else if (cid->end == CHANNEL_RECV) {
|
|
fmt = "%s(%" PRId64 ", recv=True)";
|
|
}
|
|
else {
|
|
fmt = "%s(%" PRId64 ")";
|
|
}
|
|
return PyUnicode_FromFormat(fmt, name, cid->id);
|
|
}
|
|
|
|
static PyObject *
|
|
channelid_str(PyObject *self)
|
|
{
|
|
channelid *cid = (channelid *)self;
|
|
return PyUnicode_FromFormat("%" PRId64 "", cid->id);
|
|
}
|
|
|
|
static PyObject *
|
|
channelid_int(PyObject *self)
|
|
{
|
|
channelid *cid = (channelid *)self;
|
|
return PyLong_FromLongLong(cid->id);
|
|
}
|
|
|
|
static PyNumberMethods channelid_as_number = {
|
|
0, /* nb_add */
|
|
0, /* nb_subtract */
|
|
0, /* nb_multiply */
|
|
0, /* nb_remainder */
|
|
0, /* nb_divmod */
|
|
0, /* nb_power */
|
|
0, /* nb_negative */
|
|
0, /* nb_positive */
|
|
0, /* nb_absolute */
|
|
0, /* nb_bool */
|
|
0, /* nb_invert */
|
|
0, /* nb_lshift */
|
|
0, /* nb_rshift */
|
|
0, /* nb_and */
|
|
0, /* nb_xor */
|
|
0, /* nb_or */
|
|
(unaryfunc)channelid_int, /* nb_int */
|
|
0, /* nb_reserved */
|
|
0, /* nb_float */
|
|
|
|
0, /* nb_inplace_add */
|
|
0, /* nb_inplace_subtract */
|
|
0, /* nb_inplace_multiply */
|
|
0, /* nb_inplace_remainder */
|
|
0, /* nb_inplace_power */
|
|
0, /* nb_inplace_lshift */
|
|
0, /* nb_inplace_rshift */
|
|
0, /* nb_inplace_and */
|
|
0, /* nb_inplace_xor */
|
|
0, /* nb_inplace_or */
|
|
|
|
0, /* nb_floor_divide */
|
|
0, /* nb_true_divide */
|
|
0, /* nb_inplace_floor_divide */
|
|
0, /* nb_inplace_true_divide */
|
|
|
|
(unaryfunc)channelid_int, /* nb_index */
|
|
};
|
|
|
|
static Py_hash_t
|
|
channelid_hash(PyObject *self)
|
|
{
|
|
channelid *cid = (channelid *)self;
|
|
PyObject *id = PyLong_FromLongLong(cid->id);
|
|
if (id == NULL) {
|
|
return -1;
|
|
}
|
|
Py_hash_t hash = PyObject_Hash(id);
|
|
Py_DECREF(id);
|
|
return hash;
|
|
}
|
|
|
|
static PyObject *
|
|
channelid_richcompare(PyObject *self, PyObject *other, int op)
|
|
{
|
|
if (op != Py_EQ && op != Py_NE) {
|
|
Py_RETURN_NOTIMPLEMENTED;
|
|
}
|
|
|
|
if (!PyObject_TypeCheck(self, &ChannelIDtype)) {
|
|
Py_RETURN_NOTIMPLEMENTED;
|
|
}
|
|
|
|
channelid *cid = (channelid *)self;
|
|
int equal;
|
|
if (PyObject_TypeCheck(other, &ChannelIDtype)) {
|
|
channelid *othercid = (channelid *)other;
|
|
if (cid->end != othercid->end) {
|
|
equal = 0;
|
|
}
|
|
else {
|
|
equal = (cid->id == othercid->id);
|
|
}
|
|
}
|
|
else {
|
|
other = PyNumber_Long(other);
|
|
if (other == NULL) {
|
|
PyErr_Clear();
|
|
Py_RETURN_NOTIMPLEMENTED;
|
|
}
|
|
int64_t othercid = PyLong_AsLongLong(other);
|
|
Py_DECREF(other);
|
|
if (othercid == -1 && PyErr_Occurred() != NULL) {
|
|
return NULL;
|
|
}
|
|
if (othercid < 0) {
|
|
equal = 0;
|
|
}
|
|
else {
|
|
equal = (cid->id == othercid);
|
|
}
|
|
}
|
|
|
|
if ((op == Py_EQ && equal) || (op == Py_NE && !equal)) {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
Py_RETURN_FALSE;
|
|
}
|
|
|
|
static PyObject *
|
|
_channel_from_cid(PyObject *cid, int end)
|
|
{
|
|
PyObject *highlevel = PyImport_ImportModule("interpreters");
|
|
if (highlevel == NULL) {
|
|
PyErr_Clear();
|
|
highlevel = PyImport_ImportModule("test.support.interpreters");
|
|
if (highlevel == NULL) {
|
|
return NULL;
|
|
}
|
|
}
|
|
const char *clsname = (end == CHANNEL_RECV) ? "RecvChannel" :
|
|
"SendChannel";
|
|
PyObject *cls = PyObject_GetAttrString(highlevel, clsname);
|
|
Py_DECREF(highlevel);
|
|
if (cls == NULL) {
|
|
return NULL;
|
|
}
|
|
PyObject *chan = PyObject_CallFunctionObjArgs(cls, cid, NULL);
|
|
Py_DECREF(cls);
|
|
if (chan == NULL) {
|
|
return NULL;
|
|
}
|
|
return chan;
|
|
}
|
|
|
|
struct _channelid_xid {
|
|
int64_t id;
|
|
int end;
|
|
int resolve;
|
|
};
|
|
|
|
static PyObject *
|
|
_channelid_from_xid(_PyCrossInterpreterData *data)
|
|
{
|
|
struct _channelid_xid *xid = (struct _channelid_xid *)data->data;
|
|
// Note that we do not preserve the "resolve" flag.
|
|
PyObject *cid = (PyObject *)newchannelid(&ChannelIDtype, xid->id, xid->end,
|
|
_global_channels(), 0, 0);
|
|
if (xid->end == 0) {
|
|
return cid;
|
|
}
|
|
if (!xid->resolve) {
|
|
return cid;
|
|
}
|
|
|
|
/* Try returning a high-level channel end but fall back to the ID. */
|
|
PyObject *chan = _channel_from_cid(cid, xid->end);
|
|
if (chan == NULL) {
|
|
PyErr_Clear();
|
|
return cid;
|
|
}
|
|
Py_DECREF(cid);
|
|
return chan;
|
|
}
|
|
|
|
static int
|
|
_channelid_shared(PyObject *obj, _PyCrossInterpreterData *data)
|
|
{
|
|
struct _channelid_xid *xid = PyMem_NEW(struct _channelid_xid, 1);
|
|
if (xid == NULL) {
|
|
return -1;
|
|
}
|
|
xid->id = ((channelid *)obj)->id;
|
|
xid->end = ((channelid *)obj)->end;
|
|
xid->resolve = ((channelid *)obj)->resolve;
|
|
|
|
data->data = xid;
|
|
Py_INCREF(obj);
|
|
data->obj = obj;
|
|
data->new_object = _channelid_from_xid;
|
|
data->free = PyMem_Free;
|
|
return 0;
|
|
}
|
|
|
|
static PyObject *
|
|
channelid_end(PyObject *self, void *end)
|
|
{
|
|
int force = 1;
|
|
channelid *cid = (channelid *)self;
|
|
if (end != NULL) {
|
|
return (PyObject *)newchannelid(Py_TYPE(self), cid->id, *(int *)end,
|
|
cid->channels, force, cid->resolve);
|
|
}
|
|
|
|
if (cid->end == CHANNEL_SEND) {
|
|
return PyUnicode_InternFromString("send");
|
|
}
|
|
if (cid->end == CHANNEL_RECV) {
|
|
return PyUnicode_InternFromString("recv");
|
|
}
|
|
return PyUnicode_InternFromString("both");
|
|
}
|
|
|
|
static int _channelid_end_send = CHANNEL_SEND;
|
|
static int _channelid_end_recv = CHANNEL_RECV;
|
|
|
|
static PyGetSetDef channelid_getsets[] = {
|
|
{"end", (getter)channelid_end, NULL,
|
|
PyDoc_STR("'send', 'recv', or 'both'")},
|
|
{"send", (getter)channelid_end, NULL,
|
|
PyDoc_STR("the 'send' end of the channel"), &_channelid_end_send},
|
|
{"recv", (getter)channelid_end, NULL,
|
|
PyDoc_STR("the 'recv' end of the channel"), &_channelid_end_recv},
|
|
{NULL}
|
|
};
|
|
|
|
PyDoc_STRVAR(channelid_doc,
|
|
"A channel ID identifies a channel and may be used as an int.");
|
|
|
|
static PyTypeObject ChannelIDtype = {
|
|
PyVarObject_HEAD_INIT(&PyType_Type, 0)
|
|
"_xxsubinterpreters.ChannelID", /* tp_name */
|
|
sizeof(channelid), /* tp_basicsize */
|
|
0, /* tp_itemsize */
|
|
(destructor)channelid_dealloc, /* tp_dealloc */
|
|
0, /* tp_print */
|
|
0, /* tp_getattr */
|
|
0, /* tp_setattr */
|
|
0, /* tp_as_async */
|
|
(reprfunc)channelid_repr, /* tp_repr */
|
|
&channelid_as_number, /* tp_as_number */
|
|
0, /* tp_as_sequence */
|
|
0, /* tp_as_mapping */
|
|
channelid_hash, /* tp_hash */
|
|
0, /* tp_call */
|
|
(reprfunc)channelid_str, /* tp_str */
|
|
0, /* tp_getattro */
|
|
0, /* tp_setattro */
|
|
0, /* tp_as_buffer */
|
|
Py_TPFLAGS_DEFAULT | Py_TPFLAGS_BASETYPE |
|
|
Py_TPFLAGS_LONG_SUBCLASS, /* tp_flags */
|
|
channelid_doc, /* tp_doc */
|
|
0, /* tp_traverse */
|
|
0, /* tp_clear */
|
|
channelid_richcompare, /* tp_richcompare */
|
|
0, /* tp_weaklistoffset */
|
|
0, /* tp_iter */
|
|
0, /* tp_iternext */
|
|
0, /* tp_methods */
|
|
0, /* tp_members */
|
|
channelid_getsets, /* tp_getset */
|
|
0, /* tp_base */
|
|
0, /* tp_dict */
|
|
0, /* tp_descr_get */
|
|
0, /* tp_descr_set */
|
|
0, /* tp_dictoffset */
|
|
0, /* tp_init */
|
|
0, /* tp_alloc */
|
|
// Note that we do not set tp_new to channelid_new. Instead we
|
|
// set it to NULL, meaning it cannot be instantiated from Python
|
|
// code. We do this because there is a strong relationship between
|
|
// channel IDs and the channel lifecycle, so this limitation avoids
|
|
// related complications.
|
|
NULL, /* tp_new */
|
|
};
|
|
|
|
|
|
/* interpreter-specific code ************************************************/
|
|
|
|
static PyObject * RunFailedError = NULL;
|
|
|
|
static int
|
|
interp_exceptions_init(PyObject *ns)
|
|
{
|
|
// XXX Move the exceptions into per-module memory?
|
|
|
|
if (RunFailedError == NULL) {
|
|
// An uncaught exception came out of interp_run_string().
|
|
RunFailedError = PyErr_NewException("_xxsubinterpreters.RunFailedError",
|
|
PyExc_RuntimeError, NULL);
|
|
if (RunFailedError == NULL) {
|
|
return -1;
|
|
}
|
|
if (PyDict_SetItemString(ns, "RunFailedError", RunFailedError) != 0) {
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
_is_running(PyInterpreterState *interp)
|
|
{
|
|
PyThreadState *tstate = PyInterpreterState_ThreadHead(interp);
|
|
if (PyThreadState_Next(tstate) != NULL) {
|
|
PyErr_SetString(PyExc_RuntimeError,
|
|
"interpreter has more than one thread");
|
|
return -1;
|
|
}
|
|
PyFrameObject *frame = tstate->frame;
|
|
if (frame == NULL) {
|
|
if (PyErr_Occurred() != NULL) {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
return (int)(frame->f_executing);
|
|
}
|
|
|
|
static int
|
|
_ensure_not_running(PyInterpreterState *interp)
|
|
{
|
|
int is_running = _is_running(interp);
|
|
if (is_running < 0) {
|
|
return -1;
|
|
}
|
|
if (is_running) {
|
|
PyErr_Format(PyExc_RuntimeError, "interpreter already running");
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
_run_script(PyInterpreterState *interp, const char *codestr,
|
|
_sharedns *shared, _sharedexception **exc)
|
|
{
|
|
PyObject *exctype = NULL;
|
|
PyObject *excval = NULL;
|
|
PyObject *tb = NULL;
|
|
|
|
PyObject *main_mod = _PyInterpreterState_GetMainModule(interp);
|
|
if (main_mod == NULL) {
|
|
goto error;
|
|
}
|
|
PyObject *ns = PyModule_GetDict(main_mod); // borrowed
|
|
Py_DECREF(main_mod);
|
|
if (ns == NULL) {
|
|
goto error;
|
|
}
|
|
Py_INCREF(ns);
|
|
|
|
// Apply the cross-interpreter data.
|
|
if (shared != NULL) {
|
|
if (_sharedns_apply(shared, ns) != 0) {
|
|
Py_DECREF(ns);
|
|
goto error;
|
|
}
|
|
}
|
|
|
|
// Run the string (see PyRun_SimpleStringFlags).
|
|
PyObject *result = PyRun_StringFlags(codestr, Py_file_input, ns, ns, NULL);
|
|
Py_DECREF(ns);
|
|
if (result == NULL) {
|
|
goto error;
|
|
}
|
|
else {
|
|
Py_DECREF(result); // We throw away the result.
|
|
}
|
|
|
|
*exc = NULL;
|
|
return 0;
|
|
|
|
error:
|
|
PyErr_Fetch(&exctype, &excval, &tb);
|
|
|
|
_sharedexception *sharedexc = _sharedexception_bind(exctype, excval, tb);
|
|
Py_XDECREF(exctype);
|
|
Py_XDECREF(excval);
|
|
Py_XDECREF(tb);
|
|
if (sharedexc == NULL) {
|
|
fprintf(stderr, "RunFailedError: script raised an uncaught exception");
|
|
PyErr_Clear();
|
|
sharedexc = NULL;
|
|
}
|
|
else {
|
|
assert(!PyErr_Occurred());
|
|
}
|
|
*exc = sharedexc;
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
_run_script_in_interpreter(PyInterpreterState *interp, const char *codestr,
|
|
PyObject *shareables)
|
|
{
|
|
if (_ensure_not_running(interp) < 0) {
|
|
return -1;
|
|
}
|
|
|
|
_sharedns *shared = _get_shared_ns(shareables);
|
|
if (shared == NULL && PyErr_Occurred()) {
|
|
return -1;
|
|
}
|
|
|
|
// Switch to interpreter.
|
|
PyThreadState *save_tstate = NULL;
|
|
if (interp != _PyInterpreterState_Get()) {
|
|
// XXX Using the "head" thread isn't strictly correct.
|
|
PyThreadState *tstate = PyInterpreterState_ThreadHead(interp);
|
|
// XXX Possible GILState issues?
|
|
save_tstate = PyThreadState_Swap(tstate);
|
|
}
|
|
|
|
// Run the script.
|
|
_sharedexception *exc = NULL;
|
|
int result = _run_script(interp, codestr, shared, &exc);
|
|
|
|
// Switch back.
|
|
if (save_tstate != NULL) {
|
|
PyThreadState_Swap(save_tstate);
|
|
}
|
|
|
|
// Propagate any exception out to the caller.
|
|
if (exc != NULL) {
|
|
_sharedexception_apply(exc, RunFailedError);
|
|
_sharedexception_free(exc);
|
|
}
|
|
else if (result != 0) {
|
|
// We were unable to allocate a shared exception.
|
|
PyErr_NoMemory();
|
|
}
|
|
|
|
if (shared != NULL) {
|
|
_sharedns_free(shared);
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
|
|
/* module level code ********************************************************/
|
|
|
|
/* globals is the process-global state for the module. It holds all
|
|
the data that we need to share between interpreters, so it cannot
|
|
hold PyObject values. */
|
|
static struct globals {
|
|
_channels channels;
|
|
} _globals = {{0}};
|
|
|
|
static int
|
|
_init_globals(void)
|
|
{
|
|
if (_channels_init(&_globals.channels) != 0) {
|
|
return -1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static _channels *
|
|
_global_channels(void) {
|
|
return &_globals.channels;
|
|
}
|
|
|
|
static PyObject *
|
|
interp_create(PyObject *self, PyObject *args)
|
|
{
|
|
if (!PyArg_UnpackTuple(args, "create", 0, 0)) {
|
|
return NULL;
|
|
}
|
|
|
|
// Create and initialize the new interpreter.
|
|
PyThreadState *save_tstate = PyThreadState_Swap(NULL);
|
|
// XXX Possible GILState issues?
|
|
PyThreadState *tstate = Py_NewInterpreter();
|
|
PyThreadState_Swap(save_tstate);
|
|
if (tstate == NULL) {
|
|
/* Since no new thread state was created, there is no exception to
|
|
propagate; raise a fresh one after swapping in the old thread
|
|
state. */
|
|
PyErr_SetString(PyExc_RuntimeError, "interpreter creation failed");
|
|
return NULL;
|
|
}
|
|
PyObject *idobj = _PyInterpreterState_GetIDObject(tstate->interp);
|
|
if (idobj == NULL) {
|
|
// XXX Possible GILState issues?
|
|
save_tstate = PyThreadState_Swap(tstate);
|
|
Py_EndInterpreter(tstate);
|
|
PyThreadState_Swap(save_tstate);
|
|
return NULL;
|
|
}
|
|
_PyInterpreterState_RequireIDRef(tstate->interp, 1);
|
|
return idobj;
|
|
}
|
|
|
|
PyDoc_STRVAR(create_doc,
|
|
"create() -> ID\n\
|
|
\n\
|
|
Create a new interpreter and return a unique generated ID.");
|
|
|
|
|
|
static PyObject *
|
|
interp_destroy(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
static char *kwlist[] = {"id", NULL};
|
|
PyObject *id;
|
|
// XXX Use "L" for id?
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwds,
|
|
"O:destroy", kwlist, &id)) {
|
|
return NULL;
|
|
}
|
|
if (!PyLong_Check(id)) {
|
|
PyErr_SetString(PyExc_TypeError, "ID must be an int");
|
|
return NULL;
|
|
}
|
|
|
|
// Look up the interpreter.
|
|
PyInterpreterState *interp = _PyInterpreterID_LookUp(id);
|
|
if (interp == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
// Ensure we don't try to destroy the current interpreter.
|
|
PyInterpreterState *current = _get_current();
|
|
if (current == NULL) {
|
|
return NULL;
|
|
}
|
|
if (interp == current) {
|
|
PyErr_SetString(PyExc_RuntimeError,
|
|
"cannot destroy the current interpreter");
|
|
return NULL;
|
|
}
|
|
|
|
// Ensure the interpreter isn't running.
|
|
/* XXX We *could* support destroying a running interpreter but
|
|
aren't going to worry about it for now. */
|
|
if (_ensure_not_running(interp) < 0) {
|
|
return NULL;
|
|
}
|
|
|
|
// Destroy the interpreter.
|
|
//PyInterpreterState_Delete(interp);
|
|
PyThreadState *tstate = PyInterpreterState_ThreadHead(interp);
|
|
// XXX Possible GILState issues?
|
|
PyThreadState *save_tstate = PyThreadState_Swap(tstate);
|
|
Py_EndInterpreter(tstate);
|
|
PyThreadState_Swap(save_tstate);
|
|
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
PyDoc_STRVAR(destroy_doc,
|
|
"destroy(id)\n\
|
|
\n\
|
|
Destroy the identified interpreter.\n\
|
|
\n\
|
|
Attempting to destroy the current interpreter results in a RuntimeError.\n\
|
|
So does an unrecognized ID.");
|
|
|
|
|
|
static PyObject *
|
|
interp_list_all(PyObject *self, PyObject *Py_UNUSED(ignored))
|
|
{
|
|
PyObject *ids, *id;
|
|
PyInterpreterState *interp;
|
|
|
|
ids = PyList_New(0);
|
|
if (ids == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
interp = PyInterpreterState_Head();
|
|
while (interp != NULL) {
|
|
id = _PyInterpreterState_GetIDObject(interp);
|
|
if (id == NULL) {
|
|
Py_DECREF(ids);
|
|
return NULL;
|
|
}
|
|
// insert at front of list
|
|
int res = PyList_Insert(ids, 0, id);
|
|
Py_DECREF(id);
|
|
if (res < 0) {
|
|
Py_DECREF(ids);
|
|
return NULL;
|
|
}
|
|
|
|
interp = PyInterpreterState_Next(interp);
|
|
}
|
|
|
|
return ids;
|
|
}
|
|
|
|
PyDoc_STRVAR(list_all_doc,
|
|
"list_all() -> [ID]\n\
|
|
\n\
|
|
Return a list containing the ID of every existing interpreter.");
|
|
|
|
|
|
static PyObject *
|
|
interp_get_current(PyObject *self, PyObject *Py_UNUSED(ignored))
|
|
{
|
|
PyInterpreterState *interp =_get_current();
|
|
if (interp == NULL) {
|
|
return NULL;
|
|
}
|
|
return _PyInterpreterState_GetIDObject(interp);
|
|
}
|
|
|
|
PyDoc_STRVAR(get_current_doc,
|
|
"get_current() -> ID\n\
|
|
\n\
|
|
Return the ID of current interpreter.");
|
|
|
|
|
|
static PyObject *
|
|
interp_get_main(PyObject *self, PyObject *Py_UNUSED(ignored))
|
|
{
|
|
// Currently, 0 is always the main interpreter.
|
|
PY_INT64_T id = 0;
|
|
return _PyInterpreterID_New(id);
|
|
}
|
|
|
|
PyDoc_STRVAR(get_main_doc,
|
|
"get_main() -> ID\n\
|
|
\n\
|
|
Return the ID of main interpreter.");
|
|
|
|
|
|
static PyObject *
|
|
interp_run_string(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
static char *kwlist[] = {"id", "script", "shared", NULL};
|
|
PyObject *id, *code;
|
|
PyObject *shared = NULL;
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwds,
|
|
"OU|O:run_string", kwlist,
|
|
&id, &code, &shared)) {
|
|
return NULL;
|
|
}
|
|
if (!PyLong_Check(id)) {
|
|
PyErr_SetString(PyExc_TypeError, "first arg (ID) must be an int");
|
|
return NULL;
|
|
}
|
|
|
|
// Look up the interpreter.
|
|
PyInterpreterState *interp = _PyInterpreterID_LookUp(id);
|
|
if (interp == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
// Extract code.
|
|
Py_ssize_t size;
|
|
const char *codestr = PyUnicode_AsUTF8AndSize(code, &size);
|
|
if (codestr == NULL) {
|
|
return NULL;
|
|
}
|
|
if (strlen(codestr) != (size_t)size) {
|
|
PyErr_SetString(PyExc_ValueError,
|
|
"source code string cannot contain null bytes");
|
|
return NULL;
|
|
}
|
|
|
|
// Run the code in the interpreter.
|
|
if (_run_script_in_interpreter(interp, codestr, shared) != 0) {
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
PyDoc_STRVAR(run_string_doc,
|
|
"run_string(id, script, shared)\n\
|
|
\n\
|
|
Execute the provided string in the identified interpreter.\n\
|
|
\n\
|
|
See PyRun_SimpleStrings.");
|
|
|
|
|
|
static PyObject *
|
|
object_is_shareable(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
static char *kwlist[] = {"obj", NULL};
|
|
PyObject *obj;
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwds,
|
|
"O:is_shareable", kwlist, &obj)) {
|
|
return NULL;
|
|
}
|
|
|
|
if (_PyObject_CheckCrossInterpreterData(obj) == 0) {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
PyErr_Clear();
|
|
Py_RETURN_FALSE;
|
|
}
|
|
|
|
PyDoc_STRVAR(is_shareable_doc,
|
|
"is_shareable(obj) -> bool\n\
|
|
\n\
|
|
Return True if the object's data may be shared between interpreters and\n\
|
|
False otherwise.");
|
|
|
|
|
|
static PyObject *
|
|
interp_is_running(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
static char *kwlist[] = {"id", NULL};
|
|
PyObject *id;
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwds,
|
|
"O:is_running", kwlist, &id)) {
|
|
return NULL;
|
|
}
|
|
if (!PyLong_Check(id)) {
|
|
PyErr_SetString(PyExc_TypeError, "ID must be an int");
|
|
return NULL;
|
|
}
|
|
|
|
PyInterpreterState *interp = _PyInterpreterID_LookUp(id);
|
|
if (interp == NULL) {
|
|
return NULL;
|
|
}
|
|
int is_running = _is_running(interp);
|
|
if (is_running < 0) {
|
|
return NULL;
|
|
}
|
|
if (is_running) {
|
|
Py_RETURN_TRUE;
|
|
}
|
|
Py_RETURN_FALSE;
|
|
}
|
|
|
|
PyDoc_STRVAR(is_running_doc,
|
|
"is_running(id) -> bool\n\
|
|
\n\
|
|
Return whether or not the identified interpreter is running.");
|
|
|
|
static PyObject *
|
|
channel_create(PyObject *self, PyObject *Py_UNUSED(ignored))
|
|
{
|
|
int64_t cid = _channel_create(&_globals.channels);
|
|
if (cid < 0) {
|
|
return NULL;
|
|
}
|
|
PyObject *id = (PyObject *)newchannelid(&ChannelIDtype, cid, 0,
|
|
&_globals.channels, 0, 0);
|
|
if (id == NULL) {
|
|
if (_channel_destroy(&_globals.channels, cid) != 0) {
|
|
// XXX issue a warning?
|
|
}
|
|
return NULL;
|
|
}
|
|
assert(((channelid *)id)->channels != NULL);
|
|
return id;
|
|
}
|
|
|
|
PyDoc_STRVAR(channel_create_doc,
|
|
"channel_create() -> cid\n\
|
|
\n\
|
|
Create a new cross-interpreter channel and return a unique generated ID.");
|
|
|
|
static PyObject *
|
|
channel_destroy(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
static char *kwlist[] = {"cid", NULL};
|
|
PyObject *id;
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwds,
|
|
"O:channel_destroy", kwlist, &id)) {
|
|
return NULL;
|
|
}
|
|
int64_t cid = _Py_CoerceID(id);
|
|
if (cid < 0) {
|
|
return NULL;
|
|
}
|
|
|
|
if (_channel_destroy(&_globals.channels, cid) != 0) {
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
PyDoc_STRVAR(channel_destroy_doc,
|
|
"channel_destroy(cid)\n\
|
|
\n\
|
|
Close and finalize the channel. Afterward attempts to use the channel\n\
|
|
will behave as though it never existed.");
|
|
|
|
static PyObject *
|
|
channel_list_all(PyObject *self, PyObject *Py_UNUSED(ignored))
|
|
{
|
|
int64_t count = 0;
|
|
int64_t *cids = _channels_list_all(&_globals.channels, &count);
|
|
if (cids == NULL) {
|
|
if (count == 0) {
|
|
return PyList_New(0);
|
|
}
|
|
return NULL;
|
|
}
|
|
PyObject *ids = PyList_New((Py_ssize_t)count);
|
|
if (ids == NULL) {
|
|
goto finally;
|
|
}
|
|
int64_t *cur = cids;
|
|
for (int64_t i=0; i < count; cur++, i++) {
|
|
PyObject *id = (PyObject *)newchannelid(&ChannelIDtype, *cur, 0,
|
|
&_globals.channels, 0, 0);
|
|
if (id == NULL) {
|
|
Py_DECREF(ids);
|
|
ids = NULL;
|
|
break;
|
|
}
|
|
PyList_SET_ITEM(ids, i, id);
|
|
}
|
|
|
|
finally:
|
|
PyMem_Free(cids);
|
|
return ids;
|
|
}
|
|
|
|
PyDoc_STRVAR(channel_list_all_doc,
|
|
"channel_list_all() -> [cid]\n\
|
|
\n\
|
|
Return the list of all IDs for active channels.");
|
|
|
|
static PyObject *
|
|
channel_send(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
static char *kwlist[] = {"cid", "obj", NULL};
|
|
PyObject *id;
|
|
PyObject *obj;
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwds,
|
|
"OO:channel_send", kwlist, &id, &obj)) {
|
|
return NULL;
|
|
}
|
|
int64_t cid = _Py_CoerceID(id);
|
|
if (cid < 0) {
|
|
return NULL;
|
|
}
|
|
|
|
if (_channel_send(&_globals.channels, cid, obj) != 0) {
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
PyDoc_STRVAR(channel_send_doc,
|
|
"channel_send(cid, obj)\n\
|
|
\n\
|
|
Add the object's data to the channel's queue.");
|
|
|
|
static PyObject *
|
|
channel_recv(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
static char *kwlist[] = {"cid", NULL};
|
|
PyObject *id;
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwds,
|
|
"O:channel_recv", kwlist, &id)) {
|
|
return NULL;
|
|
}
|
|
int64_t cid = _Py_CoerceID(id);
|
|
if (cid < 0) {
|
|
return NULL;
|
|
}
|
|
|
|
return _channel_recv(&_globals.channels, cid);
|
|
}
|
|
|
|
PyDoc_STRVAR(channel_recv_doc,
|
|
"channel_recv(cid) -> obj\n\
|
|
\n\
|
|
Return a new object from the data at the from of the channel's queue.");
|
|
|
|
static PyObject *
|
|
channel_close(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
static char *kwlist[] = {"cid", "send", "recv", "force", NULL};
|
|
PyObject *id;
|
|
int send = 0;
|
|
int recv = 0;
|
|
int force = 0;
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwds,
|
|
"O|$ppp:channel_close", kwlist,
|
|
&id, &send, &recv, &force)) {
|
|
return NULL;
|
|
}
|
|
int64_t cid = _Py_CoerceID(id);
|
|
if (cid < 0) {
|
|
return NULL;
|
|
}
|
|
|
|
if (_channel_close(&_globals.channels, cid, send-recv, force) != 0) {
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
PyDoc_STRVAR(channel_close_doc,
|
|
"channel_close(cid, *, send=None, recv=None, force=False)\n\
|
|
\n\
|
|
Close the channel for all interpreters.\n\
|
|
\n\
|
|
If the channel is empty then the keyword args are ignored and both\n\
|
|
ends are immediately closed. Otherwise, if 'force' is True then\n\
|
|
all queued items are released and both ends are immediately\n\
|
|
closed.\n\
|
|
\n\
|
|
If the channel is not empty *and* 'force' is False then following\n\
|
|
happens:\n\
|
|
\n\
|
|
* recv is True (regardless of send):\n\
|
|
- raise ChannelNotEmptyError\n\
|
|
* recv is None and send is None:\n\
|
|
- raise ChannelNotEmptyError\n\
|
|
* send is True and recv is not True:\n\
|
|
- fully close the 'send' end\n\
|
|
- close the 'recv' end to interpreters not already receiving\n\
|
|
- fully close it once empty\n\
|
|
\n\
|
|
Closing an already closed channel results in a ChannelClosedError.\n\
|
|
\n\
|
|
Once the channel's ID has no more ref counts in any interpreter\n\
|
|
the channel will be destroyed.");
|
|
|
|
static PyObject *
|
|
channel_release(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
// Note that only the current interpreter is affected.
|
|
static char *kwlist[] = {"cid", "send", "recv", "force", NULL};
|
|
PyObject *id;
|
|
int send = 0;
|
|
int recv = 0;
|
|
int force = 0;
|
|
if (!PyArg_ParseTupleAndKeywords(args, kwds,
|
|
"O|$ppp:channel_release", kwlist,
|
|
&id, &send, &recv, &force)) {
|
|
return NULL;
|
|
}
|
|
int64_t cid = _Py_CoerceID(id);
|
|
if (cid < 0) {
|
|
return NULL;
|
|
}
|
|
if (send == 0 && recv == 0) {
|
|
send = 1;
|
|
recv = 1;
|
|
}
|
|
|
|
// XXX Handle force is True.
|
|
// XXX Fix implicit release.
|
|
|
|
if (_channel_drop(&_globals.channels, cid, send, recv) != 0) {
|
|
return NULL;
|
|
}
|
|
Py_RETURN_NONE;
|
|
}
|
|
|
|
PyDoc_STRVAR(channel_release_doc,
|
|
"channel_release(cid, *, send=None, recv=None, force=True)\n\
|
|
\n\
|
|
Close the channel for the current interpreter. 'send' and 'recv'\n\
|
|
(bool) may be used to indicate the ends to close. By default both\n\
|
|
ends are closed. Closing an already closed end is a noop.");
|
|
|
|
static PyObject *
|
|
channel__channel_id(PyObject *self, PyObject *args, PyObject *kwds)
|
|
{
|
|
return channelid_new(&ChannelIDtype, args, kwds);
|
|
}
|
|
|
|
static PyMethodDef module_functions[] = {
|
|
{"create", (PyCFunction)interp_create,
|
|
METH_VARARGS, create_doc},
|
|
{"destroy", (PyCFunction)(void(*)(void))interp_destroy,
|
|
METH_VARARGS | METH_KEYWORDS, destroy_doc},
|
|
{"list_all", interp_list_all,
|
|
METH_NOARGS, list_all_doc},
|
|
{"get_current", interp_get_current,
|
|
METH_NOARGS, get_current_doc},
|
|
{"get_main", interp_get_main,
|
|
METH_NOARGS, get_main_doc},
|
|
{"is_running", (PyCFunction)(void(*)(void))interp_is_running,
|
|
METH_VARARGS | METH_KEYWORDS, is_running_doc},
|
|
{"run_string", (PyCFunction)(void(*)(void))interp_run_string,
|
|
METH_VARARGS | METH_KEYWORDS, run_string_doc},
|
|
|
|
{"is_shareable", (PyCFunction)(void(*)(void))object_is_shareable,
|
|
METH_VARARGS | METH_KEYWORDS, is_shareable_doc},
|
|
|
|
{"channel_create", channel_create,
|
|
METH_NOARGS, channel_create_doc},
|
|
{"channel_destroy", (PyCFunction)(void(*)(void))channel_destroy,
|
|
METH_VARARGS | METH_KEYWORDS, channel_destroy_doc},
|
|
{"channel_list_all", channel_list_all,
|
|
METH_NOARGS, channel_list_all_doc},
|
|
{"channel_send", (PyCFunction)(void(*)(void))channel_send,
|
|
METH_VARARGS | METH_KEYWORDS, channel_send_doc},
|
|
{"channel_recv", (PyCFunction)(void(*)(void))channel_recv,
|
|
METH_VARARGS | METH_KEYWORDS, channel_recv_doc},
|
|
{"channel_close", (PyCFunction)(void(*)(void))channel_close,
|
|
METH_VARARGS | METH_KEYWORDS, channel_close_doc},
|
|
{"channel_release", (PyCFunction)(void(*)(void))channel_release,
|
|
METH_VARARGS | METH_KEYWORDS, channel_release_doc},
|
|
{"_channel_id", (PyCFunction)(void(*)(void))channel__channel_id,
|
|
METH_VARARGS | METH_KEYWORDS, NULL},
|
|
|
|
{NULL, NULL} /* sentinel */
|
|
};
|
|
|
|
|
|
/* initialization function */
|
|
|
|
PyDoc_STRVAR(module_doc,
|
|
"This module provides primitive operations to manage Python interpreters.\n\
|
|
The 'interpreters' module provides a more convenient interface.");
|
|
|
|
static struct PyModuleDef interpretersmodule = {
|
|
PyModuleDef_HEAD_INIT,
|
|
"_xxsubinterpreters", /* m_name */
|
|
module_doc, /* m_doc */
|
|
-1, /* m_size */
|
|
module_functions, /* m_methods */
|
|
NULL, /* m_slots */
|
|
NULL, /* m_traverse */
|
|
NULL, /* m_clear */
|
|
NULL /* m_free */
|
|
};
|
|
|
|
|
|
PyMODINIT_FUNC
|
|
PyInit__xxsubinterpreters(void)
|
|
{
|
|
if (_init_globals() != 0) {
|
|
return NULL;
|
|
}
|
|
|
|
/* Initialize types */
|
|
ChannelIDtype.tp_base = &PyLong_Type;
|
|
if (PyType_Ready(&ChannelIDtype) != 0) {
|
|
return NULL;
|
|
}
|
|
|
|
/* Create the module */
|
|
PyObject *module = PyModule_Create(&interpretersmodule);
|
|
if (module == NULL) {
|
|
return NULL;
|
|
}
|
|
|
|
/* Add exception types */
|
|
PyObject *ns = PyModule_GetDict(module); // borrowed
|
|
if (interp_exceptions_init(ns) != 0) {
|
|
return NULL;
|
|
}
|
|
if (channel_exceptions_init(ns) != 0) {
|
|
return NULL;
|
|
}
|
|
|
|
/* Add other types */
|
|
Py_INCREF(&ChannelIDtype);
|
|
if (PyDict_SetItemString(ns, "ChannelID", (PyObject *)&ChannelIDtype) != 0) {
|
|
return NULL;
|
|
}
|
|
Py_INCREF(&_PyInterpreterID_Type);
|
|
if (PyDict_SetItemString(ns, "InterpreterID", (PyObject *)&_PyInterpreterID_Type) != 0) {
|
|
return NULL;
|
|
}
|
|
|
|
if (_PyCrossInterpreterData_RegisterClass(&ChannelIDtype, _channelid_shared)) {
|
|
return NULL;
|
|
}
|
|
|
|
return module;
|
|
}
|