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142 lines
4.1 KiB
C
142 lines
4.1 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) Zend Technologies Ltd. (http://www.zend.com) |
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+----------------------------------------------------------------------+
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| This source file is subject to version 2.00 of the Zend license, |
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| that is bundled with this package in the file LICENSE, and is |
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| available through the world-wide-web at the following url: |
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| http://www.zend.com/license/2_00.txt. |
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| If you did not receive a copy of the Zend license and are unable to |
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| obtain it through the world-wide-web, please send a note to |
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| license@zend.com so we can mail you a copy immediately. |
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+----------------------------------------------------------------------+
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| Authors: David Wang <planetbeing@gmail.com> |
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| Dmitry Stogov <dmitry@php.net> |
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+----------------------------------------------------------------------+
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*/
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#ifndef ZEND_GC_H
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#define ZEND_GC_H
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BEGIN_EXTERN_C()
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typedef struct _zend_gc_status {
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bool active;
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bool gc_protected;
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bool full;
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uint32_t runs;
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uint32_t collected;
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uint32_t threshold;
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uint32_t buf_size;
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uint32_t num_roots;
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} zend_gc_status;
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ZEND_API extern int (*gc_collect_cycles)(void);
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ZEND_API void ZEND_FASTCALL gc_possible_root(zend_refcounted *ref);
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ZEND_API void ZEND_FASTCALL gc_remove_from_buffer(zend_refcounted *ref);
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/* enable/disable automatic start of GC collection */
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ZEND_API bool gc_enable(bool enable);
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ZEND_API bool gc_enabled(void);
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/* enable/disable possible root additions */
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ZEND_API bool gc_protect(bool protect);
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ZEND_API bool gc_protected(void);
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#if GC_BENCH
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void gc_bench_print(void);
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#endif
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/* The default implementation of the gc_collect_cycles callback. */
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ZEND_API int zend_gc_collect_cycles(void);
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ZEND_API void zend_gc_get_status(zend_gc_status *status);
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void gc_globals_ctor(void);
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void gc_globals_dtor(void);
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void gc_reset(void);
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#ifdef ZTS
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size_t zend_gc_globals_size(void);
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#endif
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#define GC_REMOVE_FROM_BUFFER(p) do { \
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zend_refcounted *_p = (zend_refcounted*)(p); \
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if (GC_TYPE_INFO(_p) & GC_INFO_MASK) { \
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gc_remove_from_buffer(_p); \
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} \
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} while (0)
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#define GC_MAY_LEAK(ref) \
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((GC_TYPE_INFO(ref) & \
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(GC_INFO_MASK | (GC_NOT_COLLECTABLE << GC_FLAGS_SHIFT))) == 0)
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static zend_always_inline void gc_check_possible_root(zend_refcounted *ref)
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{
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if (EXPECTED(GC_TYPE_INFO(ref) == GC_REFERENCE)) {
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zval *zv = &((zend_reference*)ref)->val;
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if (!Z_COLLECTABLE_P(zv)) {
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return;
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}
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ref = Z_COUNTED_P(zv);
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}
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if (UNEXPECTED(GC_MAY_LEAK(ref))) {
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gc_possible_root(ref);
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}
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}
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static zend_always_inline void gc_check_possible_root_no_ref(zend_refcounted *ref)
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{
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ZEND_ASSERT(GC_TYPE_INFO(ref) != GC_REFERENCE);
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if (UNEXPECTED(GC_MAY_LEAK(ref))) {
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gc_possible_root(ref);
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}
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}
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/* These APIs can be used to simplify object get_gc implementations
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* over heterogeneous structures. See zend_generator_get_gc() for
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* a usage example. */
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typedef struct {
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zval *cur;
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zval *end;
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zval *start;
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} zend_get_gc_buffer;
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ZEND_API zend_get_gc_buffer *zend_get_gc_buffer_create(void);
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ZEND_API void zend_get_gc_buffer_grow(zend_get_gc_buffer *gc_buffer);
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static zend_always_inline void zend_get_gc_buffer_add_zval(
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zend_get_gc_buffer *gc_buffer, zval *zv) {
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if (Z_REFCOUNTED_P(zv)) {
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if (UNEXPECTED(gc_buffer->cur == gc_buffer->end)) {
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zend_get_gc_buffer_grow(gc_buffer);
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}
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ZVAL_COPY_VALUE(gc_buffer->cur, zv);
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gc_buffer->cur++;
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}
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}
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static zend_always_inline void zend_get_gc_buffer_add_obj(
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zend_get_gc_buffer *gc_buffer, zend_object *obj) {
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if (UNEXPECTED(gc_buffer->cur == gc_buffer->end)) {
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zend_get_gc_buffer_grow(gc_buffer);
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}
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ZVAL_OBJ(gc_buffer->cur, obj);
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gc_buffer->cur++;
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}
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static zend_always_inline void zend_get_gc_buffer_use(
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zend_get_gc_buffer *gc_buffer, zval **table, int *n) {
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*table = gc_buffer->start;
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*n = gc_buffer->cur - gc_buffer->start;
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}
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END_EXTERN_C()
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#endif /* ZEND_GC_H */
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