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https://github.com/php/php-src.git
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149 lines
4.4 KiB
C
149 lines
4.4 KiB
C
/*
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+----------------------------------------------------------------------+
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| Zend Engine |
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+----------------------------------------------------------------------+
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| Copyright (c) 1998-2015 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@zend.com> |
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+----------------------------------------------------------------------+
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*/
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/* $Id$ */
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#ifndef ZEND_GC_H
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#define ZEND_GC_H
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#ifndef GC_BENCH
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# define GC_BENCH 0
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#endif
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#if GC_BENCH
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# define GC_BENCH_INC(counter) GC_G(counter)++
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# define GC_BENCH_DEC(counter) GC_G(counter)--
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# define GC_BENCH_PEAK(peak, counter) do { \
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if (GC_G(counter) > GC_G(peak)) { \
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GC_G(peak) = GC_G(counter); \
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} \
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} while (0)
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#else
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# define GC_BENCH_INC(counter)
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# define GC_BENCH_DEC(counter)
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# define GC_BENCH_PEAK(peak, counter)
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#endif
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#define GC_COLOR 0xc000
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#define GC_BLACK 0x0000
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#define GC_WHITE 0x8000
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#define GC_GREY 0x4000
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#define GC_PURPLE 0xc000
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#define GC_ADDRESS(v) \
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((v) & ~GC_COLOR)
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#define GC_INFO_GET_COLOR(v) \
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(((zend_uintptr_t)(v)) & GC_COLOR)
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#define GC_INFO_SET_ADDRESS(v, a) \
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do {(v) = ((v) & GC_COLOR) | (a);} while (0)
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#define GC_INFO_SET_COLOR(v, c) \
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do {(v) = ((v) & ~GC_COLOR) | (c);} while (0)
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#define GC_INFO_SET_BLACK(v) \
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do {(v) = (v) & ~GC_COLOR;} while (0)
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#define GC_INFO_SET_PURPLE(v) \
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do {(v) = (v) | GC_COLOR;} while (0)
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typedef struct _gc_root_buffer {
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zend_refcounted *ref;
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struct _gc_root_buffer *next; /* double-linked list */
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struct _gc_root_buffer *prev;
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uint32_t refcount;
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} gc_root_buffer;
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typedef struct _zend_gc_globals {
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zend_bool gc_enabled;
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zend_bool gc_active;
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zend_bool gc_full;
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gc_root_buffer *buf; /* preallocated arrays of buffers */
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gc_root_buffer roots; /* list of possible roots of cycles */
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gc_root_buffer *unused; /* list of unused buffers */
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gc_root_buffer *first_unused; /* pointer to first unused buffer */
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gc_root_buffer *last_unused; /* pointer to last unused buffer */
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gc_root_buffer to_free; /* list to free */
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gc_root_buffer *next_to_free;
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uint32_t gc_runs;
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uint32_t collected;
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#if GC_BENCH
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uint32_t root_buf_length;
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uint32_t root_buf_peak;
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uint32_t zval_possible_root;
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uint32_t zval_buffered;
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uint32_t zval_remove_from_buffer;
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uint32_t zval_marked_grey;
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#endif
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} zend_gc_globals;
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#ifdef ZTS
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BEGIN_EXTERN_C()
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ZEND_API extern int gc_globals_id;
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END_EXTERN_C()
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#define GC_G(v) ZEND_TSRMG(gc_globals_id, zend_gc_globals *, v)
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#else
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#define GC_G(v) (gc_globals.v)
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extern ZEND_API zend_gc_globals gc_globals;
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#endif
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BEGIN_EXTERN_C()
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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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ZEND_API void gc_globals_ctor(void);
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ZEND_API void gc_globals_dtor(void);
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ZEND_API void gc_init(void);
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ZEND_API void gc_reset(void);
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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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END_EXTERN_C()
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#define GC_ZVAL_CHECK_POSSIBLE_ROOT(z) \
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gc_check_possible_root((z))
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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_ADDRESS(GC_INFO(_p))) { \
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gc_remove_from_buffer(_p); \
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} \
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} while (0)
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static zend_always_inline void gc_check_possible_root(zval *z)
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{
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ZVAL_DEREF(z);
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if (Z_COLLECTABLE_P(z) && UNEXPECTED(!Z_GC_INFO_P(z))) {
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gc_possible_root(Z_COUNTED_P(z));
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}
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}
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#endif /* ZEND_GC_H */
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/*
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* Local variables:
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* tab-width: 4
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* c-basic-offset: 4
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* indent-tabs-mode: t
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* End:
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*/
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