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zend_alloc.h
/* +----------------------------------------------------------------------+ | Zend Engine | +----------------------------------------------------------------------+ | Copyright (c) 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: Andi Gutmans <andi@php.net> | | Zeev Suraski <zeev@php.net> | | Dmitry Stogov <dmitry@php.net> | +----------------------------------------------------------------------+ */ #ifndef ZEND_ALLOC_H #define ZEND_ALLOC_H #include <stdio.h> #include "zend_types.h" #include "../TSRM/TSRM.h" #ifndef ZEND_MM_ALIGNMENT # error "ZEND_MM_ALIGNMENT was not defined during configure" #endif #define ZEND_MM_ALIGNMENT_MASK ~(ZEND_MM_ALIGNMENT - 1) #define ZEND_MM_ALIGNED_SIZE(size) (((size) + ZEND_MM_ALIGNMENT - 1) & ZEND_MM_ALIGNMENT_MASK) #define ZEND_MM_ALIGNED_SIZE_EX(size, alignment) \ (((size) + ((alignment) - 1)) & ~((alignment) - 1)) typedef struct _zend_leak_info { void *addr; size_t size; const char *filename; const char *orig_filename; uint32_t lineno; uint32_t orig_lineno; } zend_leak_info; #if ZEND_DEBUG typedef struct _zend_mm_debug_info { size_t size; const char *filename; const char *orig_filename; uint32_t lineno; uint32_t orig_lineno; } zend_mm_debug_info; # define ZEND_MM_OVERHEAD ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)) #else # define ZEND_MM_OVERHEAD 0 #endif BEGIN_EXTERN_C() ZEND_API ZEND_ATTRIBUTE_MALLOC char* ZEND_FASTCALL zend_strndup(const char *s, size_t length); ZEND_API ZEND_ATTRIBUTE_MALLOC void* ZEND_FASTCALL _emalloc(size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_ALLOC_SIZE(1); ZEND_API ZEND_ATTRIBUTE_MALLOC void* ZEND_FASTCALL _safe_emalloc(size_t nmemb, size_t size, size_t offset ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); ZEND_API ZEND_ATTRIBUTE_MALLOC void* ZEND_FASTCALL _safe_malloc(size_t nmemb, size_t size, size_t offset); ZEND_API void ZEND_FASTCALL _efree(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); ZEND_API ZEND_ATTRIBUTE_MALLOC void* ZEND_FASTCALL _ecalloc(size_t nmemb, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_ALLOC_SIZE2(1,2); ZEND_API void* ZEND_FASTCALL _erealloc(void *ptr, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_ALLOC_SIZE(2); ZEND_API void* ZEND_FASTCALL _erealloc2(void *ptr, size_t size, size_t copy_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_ALLOC_SIZE(2); ZEND_API void* ZEND_FASTCALL _safe_erealloc(void *ptr, size_t nmemb, size_t size, size_t offset ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); ZEND_API void* ZEND_FASTCALL _safe_realloc(void *ptr, size_t nmemb, size_t size, size_t offset); ZEND_API ZEND_ATTRIBUTE_MALLOC char* ZEND_FASTCALL _estrdup(const char *s ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); ZEND_API ZEND_ATTRIBUTE_MALLOC char* ZEND_FASTCALL _estrndup(const char *s, size_t length ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); ZEND_API size_t ZEND_FASTCALL _zend_mem_block_size(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); #include "zend_alloc_sizes.h" /* _emalloc() & _efree() specialization */ #if !ZEND_DEBUG && defined(HAVE_BUILTIN_CONSTANT_P) # define _ZEND_BIN_ALLOCATOR_DEF(_num, _size, _elements, _pages, x, y) \ ZEND_API ZEND_ATTRIBUTE_MALLOC void* ZEND_FASTCALL _emalloc_ ## _size(void); ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_DEF, x, y) ZEND_API ZEND_ATTRIBUTE_MALLOC void* ZEND_FASTCALL _emalloc_large(size_t size) ZEND_ATTRIBUTE_ALLOC_SIZE(1); ZEND_API ZEND_ATTRIBUTE_MALLOC void* ZEND_FASTCALL _emalloc_huge(size_t size) ZEND_ATTRIBUTE_ALLOC_SIZE(1); # define _ZEND_BIN_ALLOCATOR_SELECTOR_START(_num, _size, _elements, _pages, size, y) \ ((size <= _size) ? _emalloc_ ## _size() : # define _ZEND_BIN_ALLOCATOR_SELECTOR_END(_num, _size, _elements, _pages, size, y) \ ) # define ZEND_ALLOCATOR(size) \ ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_SELECTOR_START, size, y) \ ((size <= ZEND_MM_MAX_LARGE_SIZE) ? _emalloc_large(size) : _emalloc_huge(size)) \ ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_SELECTOR_END, size, y) # define _emalloc(size) \ (__builtin_constant_p(size) ? \ ZEND_ALLOCATOR(size) \ : \ _emalloc(size) \ ) # define _ZEND_BIN_DEALLOCATOR_DEF(_num, _size, _elements, _pages, x, y) \ ZEND_API void ZEND_FASTCALL _efree_ ## _size(void *); ZEND_MM_BINS_INFO(_ZEND_BIN_DEALLOCATOR_DEF, x, y) ZEND_API void ZEND_FASTCALL _efree_large(void *, size_t size); ZEND_API void ZEND_FASTCALL _efree_huge(void *, size_t size); # define _ZEND_BIN_DEALLOCATOR_SELECTOR_START(_num, _size, _elements, _pages, ptr, size) \ if (size <= _size) { _efree_ ## _size(ptr); } else # define ZEND_DEALLOCATOR(ptr, size) \ ZEND_MM_BINS_INFO(_ZEND_BIN_DEALLOCATOR_SELECTOR_START, ptr, size) \ if (size <= ZEND_MM_MAX_LARGE_SIZE) { _efree_large(ptr, size); } \ else { _efree_huge(ptr, size); } # define efree_size(ptr, size) do { \ if (__builtin_constant_p(size)) { \ ZEND_DEALLOCATOR(ptr, size) \ } else { \ _efree(ptr); \ } \ } while (0) # define efree_size_rel(ptr, size) \ efree_size(ptr, size) #else # define efree_size(ptr, size) \ efree(ptr) # define efree_size_rel(ptr, size) \ efree_rel(ptr) #define _emalloc_large _emalloc #define _emalloc_huge _emalloc #define _efree_large _efree #define _efree_huge _efree #endif /* Standard wrapper macros */ #define emalloc(size) _emalloc((size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define emalloc_large(size) _emalloc_large((size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define emalloc_huge(size) _emalloc_huge((size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define safe_emalloc(nmemb, size, offset) _safe_emalloc((nmemb), (size), (offset) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define efree(ptr) _efree((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define efree_large(ptr) _efree_large((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define efree_huge(ptr) _efree_huge((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define ecalloc(nmemb, size) _ecalloc((nmemb), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define erealloc(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define erealloc2(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define safe_erealloc(ptr, nmemb, size, offset) _safe_erealloc((ptr), (nmemb), (size), (offset) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define erealloc_recoverable(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define erealloc2_recoverable(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define estrdup(s) _estrdup((s) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define estrndup(s, length) _estrndup((s), (length) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define zend_mem_block_size(ptr) _zend_mem_block_size((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) /* Relay wrapper macros */ #define emalloc_rel(size) _emalloc((size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define safe_emalloc_rel(nmemb, size, offset) _safe_emalloc((nmemb), (size), (offset) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define efree_rel(ptr) _efree((ptr) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define ecalloc_rel(nmemb, size) _ecalloc((nmemb), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define erealloc_rel(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define erealloc2_rel(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define erealloc_recoverable_rel(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define erealloc2_recoverable_rel(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define safe_erealloc_rel(ptr, nmemb, size, offset) _safe_erealloc((ptr), (nmemb), (size), (offset) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define estrdup_rel(s) _estrdup((s) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define estrndup_rel(s, length) _estrndup((s), (length) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define zend_mem_block_size_rel(ptr) _zend_mem_block_size((ptr) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) ZEND_API ZEND_ATTRIBUTE_MALLOC void * __zend_malloc(size_t len ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_ALLOC_SIZE(1); ZEND_API ZEND_ATTRIBUTE_MALLOC void * __zend_calloc(size_t nmemb, size_t len ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_ALLOC_SIZE2(1,2); ZEND_API void * __zend_realloc(void *p, size_t len ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_ALLOC_SIZE(2); ZEND_API void __zend_free(void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); ZEND_API ZEND_ATTRIBUTE_MALLOC char * __zend_strdup(const char *s); /* Selective persistent/non persistent allocation macros */ #define pemalloc(size, persistent) ((persistent)?__zend_malloc(size ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC):emalloc(size)) #define safe_pemalloc(nmemb, size, offset, persistent) ((persistent)?_safe_malloc(nmemb, size, offset):safe_emalloc(nmemb, size, offset)) #define pefree(ptr, persistent) ((persistent)?free(ptr):efree(ptr)) #define pefree_size(ptr, size, persistent) do { \ if (persistent) { \ free(ptr); \ } else { \ efree_size(ptr, size);\ } \ } while (0) #define pecalloc(nmemb, size, persistent) ((persistent)?__zend_calloc((nmemb), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC):ecalloc((nmemb), (size))) #define perealloc(ptr, size, persistent) ((persistent)?__zend_realloc((ptr), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC):erealloc((ptr), (size))) #define perealloc2(ptr, size, copy_size, persistent) ((persistent)?__zend_realloc((ptr), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC):erealloc2((ptr), (size), (copy_size))) #define safe_perealloc(ptr, nmemb, size, offset, persistent) ((persistent)?_safe_realloc((ptr), (nmemb), (size), (offset)):safe_erealloc((ptr), (nmemb), (size), (offset))) #define perealloc_recoverable(ptr, size, persistent) ((persistent)?realloc((ptr), (size)):erealloc_recoverable((ptr), (size))) #define perealloc2_recoverable(ptr, size, persistent) ((persistent)?realloc((ptr), (size)):erealloc2_recoverable((ptr), (size), (copy_size))) #define pestrdup(s, persistent) ((persistent)?__zend_strdup(s):estrdup(s)) #define pestrndup(s, length, persistent) ((persistent)?zend_strndup((s),(length)):estrndup((s),(length))) #define pemalloc_rel(size, persistent) ((persistent)?__zend_malloc(size ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC):emalloc_rel(size)) #define pefree_rel(ptr, persistent) ((persistent)?free(ptr):efree_rel(ptr)) #define pecalloc_rel(nmemb, size, persistent) ((persistent)?__zend_calloc((nmemb), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC):ecalloc_rel((nmemb), (size))) #define perealloc_rel(ptr, size, persistent) ((persistent)?__zend_realloc((ptr), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC):erealloc_rel((ptr), (size))) #define perealloc2_rel(ptr, size, copy_size, persistent) ((persistent)?__zend_realloc((ptr), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC):erealloc2_rel((ptr), (size), (copy_size))) #define perealloc_recoverable_rel(ptr, size, persistent) ((persistent)?realloc((ptr), (size)):erealloc_recoverable_rel((ptr), (size))) #define perealloc2_recoverable_rel(ptr, size, copy_size, persistent) ((persistent)?realloc((ptr), (size)):erealloc2_recoverable_rel((ptr), (size), (copy_size))) #define pestrdup_rel(s, persistent) ((persistent)?strdup(s):estrdup_rel(s)) ZEND_API zend_result zend_set_memory_limit(size_t memory_limit); ZEND_API bool zend_alloc_in_memory_limit_error_reporting(void); ZEND_API void start_memory_manager(void); ZEND_API void shutdown_memory_manager(bool silent, bool full_shutdown); ZEND_API bool is_zend_mm(void); ZEND_API bool is_zend_ptr(const void *ptr); ZEND_API size_t zend_memory_usage(bool real_usage); ZEND_API size_t zend_memory_peak_usage(bool real_usage); ZEND_API void zend_memory_reset_peak_usage(void); /* fast cache for HashTables */ #define ALLOC_HASHTABLE(ht) \ (ht) = (HashTable *) emalloc(sizeof(HashTable)) #define FREE_HASHTABLE(ht) \ efree_size(ht, sizeof(HashTable)) #define ALLOC_HASHTABLE_REL(ht) \ (ht) = (HashTable *) emalloc_rel(sizeof(HashTable)) #define FREE_HASHTABLE_REL(ht) \ efree_size_rel(ht, sizeof(HashTable)) /* Heap functions */ typedef struct _zend_mm_heap zend_mm_heap; ZEND_API zend_mm_heap *zend_mm_startup(void); ZEND_API void zend_mm_shutdown(zend_mm_heap *heap, bool full_shutdown, bool silent); ZEND_API ZEND_ATTRIBUTE_MALLOC void* ZEND_FASTCALL _zend_mm_alloc(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_ALLOC_SIZE(2); ZEND_API void ZEND_FASTCALL _zend_mm_free(zend_mm_heap *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); ZEND_API void* ZEND_FASTCALL _zend_mm_realloc(zend_mm_heap *heap, void *p, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); ZEND_API void* ZEND_FASTCALL _zend_mm_realloc2(zend_mm_heap *heap, void *p, size_t size, size_t copy_size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); ZEND_API size_t ZEND_FASTCALL _zend_mm_block_size(zend_mm_heap *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); #define zend_mm_alloc(heap, size) _zend_mm_alloc((heap), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define zend_mm_free(heap, p) _zend_mm_free((heap), (p) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define zend_mm_realloc(heap, p, size) _zend_mm_realloc((heap), (p), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define zend_mm_realloc2(heap, p, size, copy_size) _zend_mm_realloc2((heap), (p), (size), (copy_size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define zend_mm_block_size(heap, p) _zend_mm_block_size((heap), (p) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) #define zend_mm_alloc_rel(heap, size) _zend_mm_alloc((heap), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define zend_mm_free_rel(heap, p) _zend_mm_free((heap), (p) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define zend_mm_realloc_rel(heap, p, size) _zend_mm_realloc((heap), (p), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define zend_mm_realloc2_rel(heap, p, size, copy_size) _zend_mm_realloc2((heap), (p), (size), (copy_size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) #define zend_mm_block_size_rel(heap, p) _zend_mm_block_size((heap), (p) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) ZEND_API zend_mm_heap *zend_mm_set_heap(zend_mm_heap *new_heap); ZEND_API zend_mm_heap *zend_mm_get_heap(void); ZEND_API size_t zend_mm_gc(zend_mm_heap *heap); #define ZEND_MM_CUSTOM_HEAP_NONE 0 #define ZEND_MM_CUSTOM_HEAP_STD 1 #define ZEND_MM_CUSTOM_HEAP_DEBUG 2 ZEND_API bool zend_mm_is_custom_heap(zend_mm_heap *new_heap); ZEND_API void zend_mm_set_custom_handlers(zend_mm_heap *heap, void* (*_malloc)(size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), void (*_free)(void* ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), void* (*_realloc)(void*, size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)); ZEND_API void zend_mm_set_custom_handlers_ex(zend_mm_heap *heap, void* (*_malloc)(size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), void (*_free)(void* ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), void* (*_realloc)(void*, size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), size_t (*_gc)(void), void (*_shutdown)(bool, bool)); ZEND_API void zend_mm_get_custom_handlers(zend_mm_heap *heap, void* (**_malloc)(size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), void (**_free)(void* ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), void* (**_realloc)(void*, size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)); ZEND_API void zend_mm_get_custom_handlers_ex(zend_mm_heap *heap, void* (**_malloc)(size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), void (**_free)(void* ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), void* (**_realloc)(void*, size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), size_t (**_gc)(void), void (**_shutdown)(bool, bool)); typedef struct _zend_mm_storage zend_mm_storage; typedef void* (*zend_mm_chunk_alloc_t)(zend_mm_storage *storage, size_t size, size_t alignment); typedef void (*zend_mm_chunk_free_t)(zend_mm_storage *storage, void *chunk, size_t size); typedef bool (*zend_mm_chunk_truncate_t)(zend_mm_storage *storage, void *chunk, size_t old_size, size_t new_size); typedef bool (*zend_mm_chunk_extend_t)(zend_mm_storage *storage, void *chunk, size_t old_size, size_t new_size); typedef struct _zend_mm_handlers { zend_mm_chunk_alloc_t chunk_alloc; zend_mm_chunk_free_t chunk_free; zend_mm_chunk_truncate_t chunk_truncate; zend_mm_chunk_extend_t chunk_extend; } zend_mm_handlers; struct _zend_mm_storage { const zend_mm_handlers handlers; void *data; }; ZEND_API zend_mm_storage *zend_mm_get_storage(zend_mm_heap *heap); ZEND_API zend_mm_heap *zend_mm_startup_ex(const zend_mm_handlers *handlers, void *data, size_t data_size); /* // The following example shows how to use zend_mm_heap API with custom storage static zend_mm_heap *apc_heap = NULL; static HashTable *apc_ht = NULL; typedef struct _apc_data { void *mem; uint32_t free_pages; } apc_data; static void *apc_chunk_alloc(zend_mm_storage *storage, size_t size, size_t alignment) { apc_data *data = (apc_data*)(storage->data); size_t real_size = ((size + (ZEND_MM_CHUNK_SIZE-1)) & ~(ZEND_MM_CHUNK_SIZE-1)); uint32_t count = real_size / ZEND_MM_CHUNK_SIZE; uint32_t first, last, i; ZEND_ASSERT(alignment == ZEND_MM_CHUNK_SIZE); for (first = 0; first < 32; first++) { if (!(data->free_pages & (1 << first))) { last = first; do { if (last - first == count - 1) { for (i = first; i <= last; i++) { data->free_pages |= (1 << i); } return (void *)(((char*)(data->mem)) + ZEND_MM_CHUNK_SIZE * (1 << first)); } last++; } while (last < 32 && !(data->free_pages & (1 << last))); first = last; } } return NULL; } static void apc_chunk_free(zend_mm_storage *storage, void *chunk, size_t size) { apc_data *data = (apc_data*)(storage->data); uint32_t i; ZEND_ASSERT(((uintptr_t)chunk & (ZEND_MM_CHUNK_SIZE - 1)) == 0); i = ((uintptr_t)chunk - (uintptr_t)(data->mem)) / ZEND_MM_CHUNK_SIZE; while (1) { data->free_pages &= ~(1 << i); if (size <= ZEND_MM_CHUNK_SIZE) { break; } size -= ZEND_MM_CHUNK_SIZE; } } static void apc_init_heap(void) { zend_mm_handlers apc_handlers = { apc_chunk_alloc, apc_chunk_free, NULL, NULL, }; apc_data tmp_data; zend_mm_heap *old_heap; // Preallocate properly aligned SHM chunks (64MB) tmp_data.mem = shm_memalign(ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE * 32); // Initialize temporary storage data tmp_data.free_pages = 0; // Create heap apc_heap = zend_mm_startup_ex(&apc_handlers, &tmp_data, sizeof(tmp_data)); // Allocate some data in the heap old_heap = zend_mm_set_heap(apc_heap); ALLOC_HASHTABLE(apc_ht); zend_hash_init(apc_ht, 64, NULL, ZVAL_PTR_DTOR, 0); zend_mm_set_heap(old_heap); } */ #ifdef ZTS size_t zend_mm_globals_size(void); #endif END_EXTERN_C() #endif
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