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Edit File : zend_gc.h \| Size : 7.23 KB
/* +----------------------------------------------------------------------+ \| Zend Engine \| +----------------------------------------------------------------------+ \| Copyright (c) 1998-2015 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; /* temporary 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 macros override macros 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: */ Back

Edit File : zend_gc.h | Size : 7.23 KB

/*
   +----------------------------------------------------------------------+
   | Zend Engine                                                          |
   +----------------------------------------------------------------------+
   | Copyright (c) 1998-2015 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;		/* temporary 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 macros override macros 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:
 */

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