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/* +----------------------------------------------------------------------+ | Zend Engine | +----------------------------------------------------------------------+ | Copyright (c) 1998-2014 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: */