mirror of
https://github.com/php/php-src.git
synced 2024-12-12 11:23:53 +08:00
246 lines
7.2 KiB
C
246 lines
7.2 KiB
C
/*
|
|
+----------------------------------------------------------------------+
|
|
| Zend Engine |
|
|
+----------------------------------------------------------------------+
|
|
| Copyright (c) 1998-2012 Zend Technologies Ltd. (http://www.zend.com) |
|
|
+----------------------------------------------------------------------+
|
|
| This source file is subject to version 2.00 of the Zend license, |
|
|
| that is bundled with this package in the file LICENSE, and is |
|
|
| available through the world-wide-web at the following url: |
|
|
| http://www.zend.com/license/2_00.txt. |
|
|
| If you did not receive a copy of the Zend license and are unable to |
|
|
| obtain it through the world-wide-web, please send a note to |
|
|
| license@zend.com so we can mail you a copy immediately. |
|
|
+----------------------------------------------------------------------+
|
|
| Authors: David Wang <planetbeing@gmail.com> |
|
|
| Dmitry Stogov <dmitry@zend.com> |
|
|
+----------------------------------------------------------------------+
|
|
*/
|
|
|
|
/* $Id$ */
|
|
|
|
#ifndef ZEND_GC_H
|
|
#define ZEND_GC_H
|
|
|
|
#ifndef GC_BENCH
|
|
# define GC_BENCH 0
|
|
#endif
|
|
|
|
#if GC_BENCH
|
|
# define GC_BENCH_INC(counter) GC_G(counter)++
|
|
# define GC_BENCH_DEC(counter) GC_G(counter)--
|
|
# define GC_BENCH_PEAK(peak, counter) do { \
|
|
if (GC_G(counter) > GC_G(peak)) { \
|
|
GC_G(peak) = GC_G(counter); \
|
|
} \
|
|
} while (0)
|
|
#else
|
|
# define GC_BENCH_INC(counter)
|
|
# define GC_BENCH_DEC(counter)
|
|
# define GC_BENCH_PEAK(peak, counter)
|
|
#endif
|
|
|
|
#define GC_COLOR 0x03
|
|
|
|
#define GC_BLACK 0x00
|
|
#define GC_WHITE 0x01
|
|
#define GC_GREY 0x02
|
|
#define GC_PURPLE 0x03
|
|
|
|
#define GC_ADDRESS(v) \
|
|
((gc_root_buffer*)(((zend_uintptr_t)(v)) & ~GC_COLOR))
|
|
#define GC_SET_ADDRESS(v, a) \
|
|
(v) = ((gc_root_buffer*)((((zend_uintptr_t)(v)) & GC_COLOR) | ((zend_uintptr_t)(a))))
|
|
#define GC_GET_COLOR(v) \
|
|
(((zend_uintptr_t)(v)) & GC_COLOR)
|
|
#define GC_SET_COLOR(v, c) \
|
|
(v) = ((gc_root_buffer*)((((zend_uintptr_t)(v)) & ~GC_COLOR) | (c)))
|
|
#define GC_SET_BLACK(v) \
|
|
(v) = ((gc_root_buffer*)(((zend_uintptr_t)(v)) & ~GC_COLOR))
|
|
#define GC_SET_PURPLE(v) \
|
|
(v) = ((gc_root_buffer*)(((zend_uintptr_t)(v)) | GC_PURPLE))
|
|
|
|
#define GC_ZVAL_INIT(z) \
|
|
((zval_gc_info*)(z))->u.buffered = NULL
|
|
#define GC_ZVAL_ADDRESS(v) \
|
|
GC_ADDRESS(((zval_gc_info*)(v))->u.buffered)
|
|
#define GC_ZVAL_SET_ADDRESS(v, a) \
|
|
GC_SET_ADDRESS(((zval_gc_info*)(v))->u.buffered, (a))
|
|
#define GC_ZVAL_GET_COLOR(v) \
|
|
GC_GET_COLOR(((zval_gc_info*)(v))->u.buffered)
|
|
#define GC_ZVAL_SET_COLOR(v, c) \
|
|
GC_SET_COLOR(((zval_gc_info*)(v))->u.buffered, (c))
|
|
#define GC_ZVAL_SET_BLACK(v) \
|
|
GC_SET_BLACK(((zval_gc_info*)(v))->u.buffered)
|
|
#define GC_ZVAL_SET_PURPLE(v) \
|
|
GC_SET_PURPLE(((zval_gc_info*)(v))->u.buffered)
|
|
|
|
#define GC_OBJ_INIT(z) \
|
|
(z)->buffered = NULL
|
|
|
|
typedef struct _gc_root_buffer {
|
|
struct _gc_root_buffer *prev; /* double-linked list */
|
|
struct _gc_root_buffer *next;
|
|
zend_object_handle handle; /* must be 0 for zval */
|
|
union {
|
|
zval *pz;
|
|
const zend_object_handlers *handlers;
|
|
} u;
|
|
} gc_root_buffer;
|
|
|
|
typedef struct _zval_gc_info {
|
|
zval z;
|
|
union {
|
|
gc_root_buffer *buffered;
|
|
struct _zval_gc_info *next;
|
|
} u;
|
|
} zval_gc_info;
|
|
|
|
typedef struct _zend_gc_globals {
|
|
zend_bool gc_enabled;
|
|
zend_bool gc_active;
|
|
|
|
gc_root_buffer *buf; /* preallocated arrays of buffers */
|
|
gc_root_buffer roots; /* list of possible roots of cycles */
|
|
gc_root_buffer *unused; /* list of unused buffers */
|
|
gc_root_buffer *first_unused; /* pointer to first unused buffer */
|
|
gc_root_buffer *last_unused; /* pointer to last unused buffer */
|
|
|
|
zval_gc_info *zval_to_free; /* temporaryt list of zvals to free */
|
|
zval_gc_info *free_list;
|
|
zval_gc_info *next_to_free;
|
|
|
|
zend_uint gc_runs;
|
|
zend_uint collected;
|
|
|
|
#if GC_BENCH
|
|
zend_uint root_buf_length;
|
|
zend_uint root_buf_peak;
|
|
zend_uint zval_possible_root;
|
|
zend_uint zobj_possible_root;
|
|
zend_uint zval_buffered;
|
|
zend_uint zobj_buffered;
|
|
zend_uint zval_remove_from_buffer;
|
|
zend_uint zobj_remove_from_buffer;
|
|
zend_uint zval_marked_grey;
|
|
zend_uint zobj_marked_grey;
|
|
#endif
|
|
|
|
} zend_gc_globals;
|
|
|
|
#ifdef ZTS
|
|
BEGIN_EXTERN_C()
|
|
ZEND_API extern int gc_globals_id;
|
|
END_EXTERN_C()
|
|
#define GC_G(v) TSRMG(gc_globals_id, zend_gc_globals *, v)
|
|
#else
|
|
#define GC_G(v) (gc_globals.v)
|
|
extern ZEND_API zend_gc_globals gc_globals;
|
|
#endif
|
|
|
|
BEGIN_EXTERN_C()
|
|
ZEND_API int gc_collect_cycles(TSRMLS_D);
|
|
ZEND_API void gc_zval_possible_root(zval *zv TSRMLS_DC);
|
|
ZEND_API void gc_zobj_possible_root(zval *zv TSRMLS_DC);
|
|
ZEND_API void gc_remove_zval_from_buffer(zval *zv TSRMLS_DC);
|
|
ZEND_API void gc_globals_ctor(TSRMLS_D);
|
|
ZEND_API void gc_globals_dtor(TSRMLS_D);
|
|
ZEND_API void gc_init(TSRMLS_D);
|
|
ZEND_API void gc_reset(TSRMLS_D);
|
|
END_EXTERN_C()
|
|
|
|
#define GC_ZVAL_CHECK_POSSIBLE_ROOT(z) \
|
|
gc_zval_check_possible_root((z) TSRMLS_CC)
|
|
|
|
#define GC_REMOVE_FROM_BUFFER(current) \
|
|
gc_remove_from_buffer((current) TSRMLS_CC)
|
|
|
|
#define GC_REMOVE_ZVAL_FROM_BUFFER(z) \
|
|
if (GC_ADDRESS(((zval_gc_info*)z)->u.buffered)) { \
|
|
gc_remove_zval_from_buffer(z TSRMLS_CC); \
|
|
}
|
|
|
|
#define GC_ZOBJ_CHECK_POSSIBLE_ROOT(zobject) \
|
|
do { \
|
|
if (EXPECTED(EG(objects_store).object_buckets != NULL) && \
|
|
EG(objects_store).object_buckets[Z_OBJ_HANDLE_P(zobject)].valid) { \
|
|
gc_zobj_possible_root(zobject TSRMLS_CC); \
|
|
} \
|
|
} while (0)
|
|
|
|
#define GC_REMOVE_ZOBJ_FROM_BUFFER(obj) \
|
|
do { \
|
|
if (GC_ADDRESS((obj)->buffered) && !GC_G(gc_active)) { \
|
|
GC_BENCH_INC(zobj_remove_from_buffer); \
|
|
GC_REMOVE_FROM_BUFFER(GC_ADDRESS((obj)->buffered)); \
|
|
(obj)->buffered = NULL; \
|
|
} \
|
|
} while (0)
|
|
|
|
static zend_always_inline void gc_zval_check_possible_root(zval *z TSRMLS_DC)
|
|
{
|
|
if (z->type == IS_ARRAY || z->type == IS_OBJECT) {
|
|
gc_zval_possible_root(z TSRMLS_CC);
|
|
}
|
|
}
|
|
|
|
static zend_always_inline void gc_remove_from_buffer(gc_root_buffer *root TSRMLS_DC)
|
|
{
|
|
root->next->prev = root->prev;
|
|
root->prev->next = root->next;
|
|
root->prev = GC_G(unused);
|
|
GC_G(unused) = root;
|
|
GC_BENCH_DEC(root_buf_length);
|
|
}
|
|
|
|
#define ALLOC_PERMANENT_ZVAL(z) \
|
|
do { \
|
|
(z) = (zval*)malloc(sizeof(zval_gc_info)); \
|
|
GC_ZVAL_INIT(z); \
|
|
} while (0)
|
|
|
|
/* The following macroses override macroses from zend_alloc.h */
|
|
#undef ALLOC_ZVAL
|
|
#define ALLOC_ZVAL(z) \
|
|
do { \
|
|
(z) = (zval*)emalloc(sizeof(zval_gc_info)); \
|
|
GC_ZVAL_INIT(z); \
|
|
} while (0)
|
|
|
|
#undef FREE_ZVAL
|
|
#define FREE_ZVAL(z) \
|
|
do { \
|
|
GC_REMOVE_ZVAL_FROM_BUFFER(z); \
|
|
efree(z); \
|
|
} while (0)
|
|
|
|
#undef ALLOC_ZVAL_REL
|
|
#define ALLOC_ZVAL_REL(z) \
|
|
do { \
|
|
(z) = (zval*)emalloc_rel(sizeof(zval_gc_info)); \
|
|
GC_ZVAL_INIT(z); \
|
|
} while (0)
|
|
|
|
#undef FREE_ZVAL_REL
|
|
#define FREE_ZVAL_REL(z) \
|
|
do { \
|
|
GC_REMOVE_ZVAL_FROM_BUFFER(z); \
|
|
efree_rel(z); \
|
|
} while (0)
|
|
|
|
#define FREE_ZVAL_EX(z) \
|
|
efree(z)
|
|
|
|
#define FREE_ZVAL_REL_EX(z) \
|
|
efree_rel(z)
|
|
|
|
#endif /* ZEND_GC_H */
|
|
|
|
/*
|
|
* Local variables:
|
|
* tab-width: 4
|
|
* c-basic-offset: 4
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*/
|