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/* +----------------------------------------------------------------------+ | Zend Engine | +----------------------------------------------------------------------+ | Copyright (c) 1998-2018 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 0xc000 #define GC_BLACK 0x0000 #define GC_WHITE 0x8000 #define GC_GREY 0x4000 #define GC_PURPLE 0xc000 #define GC_ADDRESS(v) \ ((v) & ~GC_COLOR) #define GC_INFO_GET_COLOR(v) \ (((zend_uintptr_t)(v)) & GC_COLOR) #define GC_INFO_SET_ADDRESS(v, a) \ do {(v) = ((v) & GC_COLOR) | (a);} while (0) #define GC_INFO_SET_COLOR(v, c) \ do {(v) = ((v) & ~GC_COLOR) | (c);} while (0) #define GC_INFO_SET_BLACK(v) \ do {(v) = (v) & ~GC_COLOR;} while (0) #define GC_INFO_SET_PURPLE(v) \ do {(v) = (v) | GC_COLOR;} while (0) typedef struct _gc_root_buffer { zend_refcounted *ref; struct _gc_root_buffer *next; /* double-linked list */ struct _gc_root_buffer *prev; uint32_t refcount; } gc_root_buffer; #define GC_NUM_ADDITIONAL_ENTRIES \ ((4096 - ZEND_MM_OVERHEAD - sizeof(void*) * 2) / sizeof(gc_root_buffer)) typedef struct _gc_additional_bufer gc_additional_buffer; struct _gc_additional_bufer { uint32_t used; gc_additional_buffer *next; gc_root_buffer buf[GC_NUM_ADDITIONAL_ENTRIES]; }; typedef struct _zend_gc_globals { zend_bool gc_enabled; zend_bool gc_active; zend_bool gc_full; 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 */ gc_root_buffer to_free; /* list to free */ gc_root_buffer *next_to_free; uint32_t gc_runs; uint32_t collected; #if GC_BENCH uint32_t root_buf_length; uint32_t root_buf_peak; uint32_t zval_possible_root; uint32_t zval_buffered; uint32_t zval_remove_from_buffer; uint32_t zval_marked_grey; #endif gc_additional_buffer *additional_buffer; } zend_gc_globals; #ifdef ZTS BEGIN_EXTERN_C() ZEND_API extern int gc_globals_id; END_EXTERN_C() #define GC_G(v) ZEND_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 extern int (*gc_collect_cycles)(void); ZEND_API void ZEND_FASTCALL gc_possible_root(zend_refcounted *ref); ZEND_API void ZEND_FASTCALL gc_remove_from_buffer(zend_refcounted *ref); ZEND_API void gc_globals_ctor(void); ZEND_API void gc_globals_dtor(void); ZEND_API void gc_init(void); ZEND_API void gc_reset(void); /* The default implementation of the gc_collect_cycles callback. */ ZEND_API int zend_gc_collect_cycles(void); END_EXTERN_C() #define GC_ZVAL_CHECK_POSSIBLE_ROOT(z) \ gc_check_possible_root((z)) #define GC_REMOVE_FROM_BUFFER(p) do { \ zend_refcounted *_p = (zend_refcounted*)(p); \ if (GC_ADDRESS(GC_INFO(_p))) { \ gc_remove_from_buffer(_p); \ } \ } while (0) static zend_always_inline void gc_check_possible_root(zval *z) { ZVAL_DEREF(z); if (Z_COLLECTABLE_P(z) && UNEXPECTED(!Z_GC_INFO_P(z))) { gc_possible_root(Z_COUNTED_P(z)); } } #endif /* ZEND_GC_H */ /* * Local variables: * tab-width: 4 * c-basic-offset: 4 * indent-tabs-mode: t * End: */