1 /* 2 +----------------------------------------------------------------------+ 3 | Zend Engine | 4 +----------------------------------------------------------------------+ 5 | Copyright (c) Zend Technologies Ltd. (http://www.zend.com) | 6 +----------------------------------------------------------------------+ 7 | This source file is subject to version 2.00 of the Zend license, | 8 | that is bundled with this package in the file LICENSE, and is | 9 | available through the world-wide-web at the following url: | 10 | http://www.zend.com/license/2_00.txt. | 11 | If you did not receive a copy of the Zend license and are unable to | 12 | obtain it through the world-wide-web, please send a note to | 13 | license@zend.com so we can mail you a copy immediately. | 14 +----------------------------------------------------------------------+ 15 | Authors: Andi Gutmans <andi@php.net> | 16 | Zeev Suraski <zeev@php.net> | 17 | Dmitry Stogov <dmitry@php.net> | 18 +----------------------------------------------------------------------+ 19 */ 20 21 #ifndef ZEND_ALLOC_H 22 #define ZEND_ALLOC_H 23 24 #include <stdio.h> 25 26 #include "../TSRM/TSRM.h" 27 28 #ifndef ZEND_MM_ALIGNMENT 29 # error "ZEND_MM_ALIGNMENT was not defined during configure" 30 #endif 31 32 #define ZEND_MM_ALIGNMENT_MASK ~(ZEND_MM_ALIGNMENT - 1) 33 34 #define ZEND_MM_ALIGNED_SIZE(size) (((size) + ZEND_MM_ALIGNMENT - 1) & ZEND_MM_ALIGNMENT_MASK) 35 36 #define ZEND_MM_ALIGNED_SIZE_EX(size, alignment) \ 37 (((size) + ((alignment) - 1)) & ~((alignment) - 1)) 38 39 typedef struct _zend_leak_info { 40 void *addr; 41 size_t size; 42 const char *filename; 43 const char *orig_filename; 44 uint32_t lineno; 45 uint32_t orig_lineno; 46 } zend_leak_info; 47 48 #if ZEND_DEBUG 49 typedef struct _zend_mm_debug_info { 50 size_t size; 51 const char *filename; 52 const char *orig_filename; 53 uint32_t lineno; 54 uint32_t orig_lineno; 55 } zend_mm_debug_info; 56 57 # define ZEND_MM_OVERHEAD ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)) 58 #else 59 # define ZEND_MM_OVERHEAD 0 60 #endif 61 62 BEGIN_EXTERN_C() 63 64 ZEND_API ZEND_ATTRIBUTE_MALLOC char* ZEND_FASTCALL zend_strndup(const char *s, size_t length); 65 66 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); 67 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); 68 ZEND_API ZEND_ATTRIBUTE_MALLOC void* ZEND_FASTCALL _safe_malloc(size_t nmemb, size_t size, size_t offset); 69 ZEND_API void ZEND_FASTCALL _efree(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); 70 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); 71 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); 72 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); 73 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); 74 ZEND_API void* ZEND_FASTCALL _safe_realloc(void *ptr, size_t nmemb, size_t size, size_t offset); 75 ZEND_API ZEND_ATTRIBUTE_MALLOC char* ZEND_FASTCALL _estrdup(const char *s ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); 76 ZEND_API ZEND_ATTRIBUTE_MALLOC char* ZEND_FASTCALL _estrndup(const char *s, size_t length ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); 77 ZEND_API size_t ZEND_FASTCALL _zend_mem_block_size(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); 78 79 #include "zend_alloc_sizes.h" 80 81 /* _emalloc() & _efree() specialization */ 82 #if !ZEND_DEBUG && defined(HAVE_BUILTIN_CONSTANT_P) 83 84 # define _ZEND_BIN_ALLOCATOR_DEF(_num, _size, _elements, _pages, x, y) \ 85 ZEND_API ZEND_ATTRIBUTE_MALLOC void* ZEND_FASTCALL _emalloc_ ## _size(void); 86 87 ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_DEF, x, y) 88 89 ZEND_API ZEND_ATTRIBUTE_MALLOC void* ZEND_FASTCALL _emalloc_large(size_t size) ZEND_ATTRIBUTE_ALLOC_SIZE(1); 90 ZEND_API ZEND_ATTRIBUTE_MALLOC void* ZEND_FASTCALL _emalloc_huge(size_t size) ZEND_ATTRIBUTE_ALLOC_SIZE(1); 91 92 # define _ZEND_BIN_ALLOCATOR_SELECTOR_START(_num, _size, _elements, _pages, size, y) \ 93 ((size <= _size) ? _emalloc_ ## _size() : 94 # define _ZEND_BIN_ALLOCATOR_SELECTOR_END(_num, _size, _elements, _pages, size, y) \ 95 ) 96 97 # define ZEND_ALLOCATOR(size) \ 98 ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_SELECTOR_START, size, y) \ 99 ((size <= ZEND_MM_MAX_LARGE_SIZE) ? _emalloc_large(size) : _emalloc_huge(size)) \ 100 ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_SELECTOR_END, size, y) 101 102 # define _emalloc(size) \ 103 (__builtin_constant_p(size) ? \ 104 ZEND_ALLOCATOR(size) \ 105 : \ 106 _emalloc(size) \ 107 ) 108 109 # define _ZEND_BIN_DEALLOCATOR_DEF(_num, _size, _elements, _pages, x, y) \ 110 ZEND_API void ZEND_FASTCALL _efree_ ## _size(void *); 111 112 ZEND_MM_BINS_INFO(_ZEND_BIN_DEALLOCATOR_DEF, x, y) 113 114 ZEND_API void ZEND_FASTCALL _efree_large(void *, size_t size); 115 ZEND_API void ZEND_FASTCALL _efree_huge(void *, size_t size); 116 117 # define _ZEND_BIN_DEALLOCATOR_SELECTOR_START(_num, _size, _elements, _pages, ptr, size) \ 118 if (size <= _size) { _efree_ ## _size(ptr); } else 119 120 # define ZEND_DEALLOCATOR(ptr, size) \ 121 ZEND_MM_BINS_INFO(_ZEND_BIN_DEALLOCATOR_SELECTOR_START, ptr, size) \ 122 if (size <= ZEND_MM_MAX_LARGE_SIZE) { _efree_large(ptr, size); } \ 123 else { _efree_huge(ptr, size); } 124 125 # define efree_size(ptr, size) do { \ 126 if (__builtin_constant_p(size)) { \ 127 ZEND_DEALLOCATOR(ptr, size) \ 128 } else { \ 129 _efree(ptr); \ 130 } \ 131 } while (0) 132 # define efree_size_rel(ptr, size) \ 133 efree_size(ptr, size) 134 135 #else 136 137 # define efree_size(ptr, size) \ 138 efree(ptr) 139 # define efree_size_rel(ptr, size) \ 140 efree_rel(ptr) 141 142 #define _emalloc_large _emalloc 143 #define _emalloc_huge _emalloc 144 #define _efree_large _efree 145 #define _efree_huge _efree 146 147 #endif 148 149 /* Standard wrapper macros */ 150 #define emalloc(size) _emalloc((size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 151 #define emalloc_large(size) _emalloc_large((size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 152 #define emalloc_huge(size) _emalloc_huge((size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 153 #define safe_emalloc(nmemb, size, offset) _safe_emalloc((nmemb), (size), (offset) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 154 #define efree(ptr) _efree((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 155 #define efree_large(ptr) _efree_large((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 156 #define efree_huge(ptr) _efree_huge((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 157 #define ecalloc(nmemb, size) _ecalloc((nmemb), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 158 #define erealloc(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 159 #define erealloc2(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 160 #define safe_erealloc(ptr, nmemb, size, offset) _safe_erealloc((ptr), (nmemb), (size), (offset) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 161 #define erealloc_recoverable(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 162 #define erealloc2_recoverable(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 163 #define estrdup(s) _estrdup((s) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 164 #define estrndup(s, length) _estrndup((s), (length) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 165 #define zend_mem_block_size(ptr) _zend_mem_block_size((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 166 167 /* Relay wrapper macros */ 168 #define emalloc_rel(size) _emalloc((size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 169 #define safe_emalloc_rel(nmemb, size, offset) _safe_emalloc((nmemb), (size), (offset) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 170 #define efree_rel(ptr) _efree((ptr) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 171 #define ecalloc_rel(nmemb, size) _ecalloc((nmemb), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 172 #define erealloc_rel(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 173 #define erealloc2_rel(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 174 #define erealloc_recoverable_rel(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 175 #define erealloc2_recoverable_rel(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 176 #define safe_erealloc_rel(ptr, nmemb, size, offset) _safe_erealloc((ptr), (nmemb), (size), (offset) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 177 #define estrdup_rel(s) _estrdup((s) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 178 #define estrndup_rel(s, length) _estrndup((s), (length) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 179 #define zend_mem_block_size_rel(ptr) _zend_mem_block_size((ptr) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 180 181 ZEND_API ZEND_ATTRIBUTE_MALLOC void * __zend_malloc(size_t len) ZEND_ATTRIBUTE_ALLOC_SIZE(1); 182 ZEND_API ZEND_ATTRIBUTE_MALLOC void * __zend_calloc(size_t nmemb, size_t len) ZEND_ATTRIBUTE_ALLOC_SIZE2(1,2); 183 ZEND_API void * __zend_realloc(void *p, size_t len) ZEND_ATTRIBUTE_ALLOC_SIZE(2); 184 ZEND_API ZEND_ATTRIBUTE_MALLOC char * __zend_strdup(const char *s); 185 186 /* Selective persistent/non persistent allocation macros */ 187 #define pemalloc(size, persistent) ((persistent)?__zend_malloc(size):emalloc(size)) 188 #define safe_pemalloc(nmemb, size, offset, persistent) ((persistent)?_safe_malloc(nmemb, size, offset):safe_emalloc(nmemb, size, offset)) 189 #define pefree(ptr, persistent) ((persistent)?free(ptr):efree(ptr)) 190 #define pefree_size(ptr, size, persistent) do { \ 191 if (persistent) { \ 192 free(ptr); \ 193 } else { \ 194 efree_size(ptr, size);\ 195 } \ 196 } while (0) 197 198 #define pecalloc(nmemb, size, persistent) ((persistent)?__zend_calloc((nmemb), (size)):ecalloc((nmemb), (size))) 199 #define perealloc(ptr, size, persistent) ((persistent)?__zend_realloc((ptr), (size)):erealloc((ptr), (size))) 200 #define perealloc2(ptr, size, copy_size, persistent) ((persistent)?__zend_realloc((ptr), (size)):erealloc2((ptr), (size), (copy_size))) 201 #define safe_perealloc(ptr, nmemb, size, offset, persistent) ((persistent)?_safe_realloc((ptr), (nmemb), (size), (offset)):safe_erealloc((ptr), (nmemb), (size), (offset))) 202 #define perealloc_recoverable(ptr, size, persistent) ((persistent)?realloc((ptr), (size)):erealloc_recoverable((ptr), (size))) 203 #define perealloc2_recoverable(ptr, size, persistent) ((persistent)?realloc((ptr), (size)):erealloc2_recoverable((ptr), (size), (copy_size))) 204 #define pestrdup(s, persistent) ((persistent)?__zend_strdup(s):estrdup(s)) 205 #define pestrndup(s, length, persistent) ((persistent)?zend_strndup((s),(length)):estrndup((s),(length))) 206 207 #define pemalloc_rel(size, persistent) ((persistent)?__zend_malloc(size):emalloc_rel(size)) 208 #define pefree_rel(ptr, persistent) ((persistent)?free(ptr):efree_rel(ptr)) 209 #define pecalloc_rel(nmemb, size, persistent) ((persistent)?__zend_calloc((nmemb), (size)):ecalloc_rel((nmemb), (size))) 210 #define perealloc_rel(ptr, size, persistent) ((persistent)?__zend_realloc((ptr), (size)):erealloc_rel((ptr), (size))) 211 #define perealloc2_rel(ptr, size, copy_size, persistent) ((persistent)?__zend_realloc((ptr), (size)):erealloc2_rel((ptr), (size), (copy_size))) 212 #define perealloc_recoverable_rel(ptr, size, persistent) ((persistent)?realloc((ptr), (size)):erealloc_recoverable_rel((ptr), (size))) 213 #define perealloc2_recoverable_rel(ptr, size, copy_size, persistent) ((persistent)?realloc((ptr), (size)):erealloc2_recoverable_rel((ptr), (size), (copy_size))) 214 #define pestrdup_rel(s, persistent) ((persistent)?strdup(s):estrdup_rel(s)) 215 216 ZEND_API zend_result zend_set_memory_limit(size_t memory_limit); 217 ZEND_API bool zend_alloc_in_memory_limit_error_reporting(void); 218 219 ZEND_API void start_memory_manager(void); 220 ZEND_API void shutdown_memory_manager(bool silent, bool full_shutdown); 221 ZEND_API bool is_zend_mm(void); 222 ZEND_API bool is_zend_ptr(const void *ptr); 223 224 ZEND_API size_t zend_memory_usage(bool real_usage); 225 ZEND_API size_t zend_memory_peak_usage(bool real_usage); 226 ZEND_API void zend_memory_reset_peak_usage(void); 227 228 /* fast cache for HashTables */ 229 #define ALLOC_HASHTABLE(ht) \ 230 (ht) = (HashTable *) emalloc(sizeof(HashTable)) 231 232 #define FREE_HASHTABLE(ht) \ 233 efree_size(ht, sizeof(HashTable)) 234 235 #define ALLOC_HASHTABLE_REL(ht) \ 236 (ht) = (HashTable *) emalloc_rel(sizeof(HashTable)) 237 238 #define FREE_HASHTABLE_REL(ht) \ 239 efree_size_rel(ht, sizeof(HashTable)) 240 241 /* Heap functions */ 242 typedef struct _zend_mm_heap zend_mm_heap; 243 244 ZEND_API zend_mm_heap *zend_mm_startup(void); 245 ZEND_API void zend_mm_shutdown(zend_mm_heap *heap, bool full_shutdown, bool silent); 246 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); 247 ZEND_API void ZEND_FASTCALL _zend_mm_free(zend_mm_heap *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); 248 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); 249 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); 250 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); 251 252 #define zend_mm_alloc(heap, size) _zend_mm_alloc((heap), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 253 #define zend_mm_free(heap, p) _zend_mm_free((heap), (p) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 254 #define zend_mm_realloc(heap, p, size) _zend_mm_realloc((heap), (p), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 255 #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) 256 #define zend_mm_block_size(heap, p) _zend_mm_block_size((heap), (p) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 257 258 #define zend_mm_alloc_rel(heap, size) _zend_mm_alloc((heap), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 259 #define zend_mm_free_rel(heap, p) _zend_mm_free((heap), (p) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 260 #define zend_mm_realloc_rel(heap, p, size) _zend_mm_realloc((heap), (p), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 261 #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) 262 #define zend_mm_block_size_rel(heap, p) _zend_mm_block_size((heap), (p) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 263 264 ZEND_API zend_mm_heap *zend_mm_set_heap(zend_mm_heap *new_heap); 265 ZEND_API zend_mm_heap *zend_mm_get_heap(void); 266 267 ZEND_API size_t zend_mm_gc(zend_mm_heap *heap); 268 269 #define ZEND_MM_CUSTOM_HEAP_NONE 0 270 #define ZEND_MM_CUSTOM_HEAP_STD 1 271 #define ZEND_MM_CUSTOM_HEAP_DEBUG 2 272 273 ZEND_API bool zend_mm_is_custom_heap(zend_mm_heap *new_heap); 274 ZEND_API void zend_mm_set_custom_handlers(zend_mm_heap *heap, 275 void* (*_malloc)(size_t), 276 void (*_free)(void*), 277 void* (*_realloc)(void*, size_t)); 278 ZEND_API void zend_mm_get_custom_handlers(zend_mm_heap *heap, 279 void* (**_malloc)(size_t), 280 void (**_free)(void*), 281 void* (**_realloc)(void*, size_t)); 282 283 #if ZEND_DEBUG 284 ZEND_API void zend_mm_set_custom_debug_handlers(zend_mm_heap *heap, 285 void* (*_malloc)(size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), 286 void (*_free)(void* ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), 287 void* (*_realloc)(void*, size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)); 288 #endif 289 290 typedef struct _zend_mm_storage zend_mm_storage; 291 292 typedef void* (*zend_mm_chunk_alloc_t)(zend_mm_storage *storage, size_t size, size_t alignment); 293 typedef void (*zend_mm_chunk_free_t)(zend_mm_storage *storage, void *chunk, size_t size); 294 typedef bool (*zend_mm_chunk_truncate_t)(zend_mm_storage *storage, void *chunk, size_t old_size, size_t new_size); 295 typedef bool (*zend_mm_chunk_extend_t)(zend_mm_storage *storage, void *chunk, size_t old_size, size_t new_size); 296 297 typedef struct _zend_mm_handlers { 298 zend_mm_chunk_alloc_t chunk_alloc; 299 zend_mm_chunk_free_t chunk_free; 300 zend_mm_chunk_truncate_t chunk_truncate; 301 zend_mm_chunk_extend_t chunk_extend; 302 } zend_mm_handlers; 303 304 struct _zend_mm_storage { 305 const zend_mm_handlers handlers; 306 void *data; 307 }; 308 309 ZEND_API zend_mm_storage *zend_mm_get_storage(zend_mm_heap *heap); 310 ZEND_API zend_mm_heap *zend_mm_startup_ex(const zend_mm_handlers *handlers, void *data, size_t data_size); 311 312 /* 313 314 // The following example shows how to use zend_mm_heap API with custom storage 315 316 static zend_mm_heap *apc_heap = NULL; 317 static HashTable *apc_ht = NULL; 318 319 typedef struct _apc_data { 320 void *mem; 321 uint32_t free_pages; 322 } apc_data; 323 324 static void *apc_chunk_alloc(zend_mm_storage *storage, size_t size, size_t alignment) 325 { 326 apc_data *data = (apc_data*)(storage->data); 327 size_t real_size = ((size + (ZEND_MM_CHUNK_SIZE-1)) & ~(ZEND_MM_CHUNK_SIZE-1)); 328 uint32_t count = real_size / ZEND_MM_CHUNK_SIZE; 329 uint32_t first, last, i; 330 331 ZEND_ASSERT(alignment == ZEND_MM_CHUNK_SIZE); 332 333 for (first = 0; first < 32; first++) { 334 if (!(data->free_pages & (1 << first))) { 335 last = first; 336 do { 337 if (last - first == count - 1) { 338 for (i = first; i <= last; i++) { 339 data->free_pages |= (1 << i); 340 } 341 return (void *)(((char*)(data->mem)) + ZEND_MM_CHUNK_SIZE * (1 << first)); 342 } 343 last++; 344 } while (last < 32 && !(data->free_pages & (1 << last))); 345 first = last; 346 } 347 } 348 return NULL; 349 } 350 351 static void apc_chunk_free(zend_mm_storage *storage, void *chunk, size_t size) 352 { 353 apc_data *data = (apc_data*)(storage->data); 354 uint32_t i; 355 356 ZEND_ASSERT(((uintptr_t)chunk & (ZEND_MM_CHUNK_SIZE - 1)) == 0); 357 358 i = ((uintptr_t)chunk - (uintptr_t)(data->mem)) / ZEND_MM_CHUNK_SIZE; 359 while (1) { 360 data->free_pages &= ~(1 << i); 361 if (size <= ZEND_MM_CHUNK_SIZE) { 362 break; 363 } 364 size -= ZEND_MM_CHUNK_SIZE; 365 } 366 } 367 368 static void apc_init_heap(void) 369 { 370 zend_mm_handlers apc_handlers = { 371 apc_chunk_alloc, 372 apc_chunk_free, 373 NULL, 374 NULL, 375 }; 376 apc_data tmp_data; 377 zend_mm_heap *old_heap; 378 379 // Preallocate properly aligned SHM chunks (64MB) 380 tmp_data.mem = shm_memalign(ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE * 32); 381 382 // Initialize temporary storage data 383 tmp_data.free_pages = 0; 384 385 // Create heap 386 apc_heap = zend_mm_startup_ex(&apc_handlers, &tmp_data, sizeof(tmp_data)); 387 388 // Allocate some data in the heap 389 old_heap = zend_mm_set_heap(apc_heap); 390 ALLOC_HASHTABLE(apc_ht); 391 zend_hash_init(apc_ht, 64, NULL, ZVAL_PTR_DTOR, 0); 392 zend_mm_set_heap(old_heap); 393 } 394 395 */ 396 397 #ifdef ZTS 398 size_t zend_mm_globals_size(void); 399 #endif 400 401 END_EXTERN_C() 402 403 #endif 404
