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 #include "zend.h" 28 29 #ifndef ZEND_MM_ALIGNMENT 30 # define ZEND_MM_ALIGNMENT Z_UL(8) 31 # define ZEND_MM_ALIGNMENT_LOG2 Z_L(3) 32 #elif ZEND_MM_ALIGNMENT < 4 33 # undef ZEND_MM_ALIGNMENT 34 # undef ZEND_MM_ALIGNMENT_LOG2 35 # define ZEND_MM_ALIGNMENT Z_UL(4) 36 # define ZEND_MM_ALIGNMENT_LOG2 Z_L(2) 37 #endif 38 39 #define ZEND_MM_ALIGNMENT_MASK ~(ZEND_MM_ALIGNMENT - 1) 40 41 #define ZEND_MM_ALIGNED_SIZE(size) (((size) + ZEND_MM_ALIGNMENT - 1) & ZEND_MM_ALIGNMENT_MASK) 42 43 #define ZEND_MM_ALIGNED_SIZE_EX(size, alignment) \ 44 (((size) + ((alignment) - 1)) & ~((alignment) - 1)) 45 46 typedef struct _zend_leak_info { 47 void *addr; 48 size_t size; 49 const char *filename; 50 const char *orig_filename; 51 uint32_t lineno; 52 uint32_t orig_lineno; 53 } zend_leak_info; 54 55 #if ZEND_DEBUG 56 typedef struct _zend_mm_debug_info { 57 size_t size; 58 const char *filename; 59 const char *orig_filename; 60 uint32_t lineno; 61 uint32_t orig_lineno; 62 } zend_mm_debug_info; 63 64 # define ZEND_MM_OVERHEAD ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)) 65 #else 66 # define ZEND_MM_OVERHEAD 0 67 #endif 68 69 BEGIN_EXTERN_C() 70 71 ZEND_API char* ZEND_FASTCALL zend_strndup(const char *s, size_t length) ZEND_ATTRIBUTE_MALLOC; 72 73 ZEND_API void* ZEND_FASTCALL _emalloc(size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_MALLOC ZEND_ATTRIBUTE_ALLOC_SIZE(1); 74 ZEND_API void* ZEND_FASTCALL _safe_emalloc(size_t nmemb, size_t size, size_t offset ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_MALLOC; 75 ZEND_API void* ZEND_FASTCALL _safe_malloc(size_t nmemb, size_t size, size_t offset) ZEND_ATTRIBUTE_MALLOC; 76 ZEND_API void ZEND_FASTCALL _efree(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); 77 ZEND_API void* ZEND_FASTCALL _ecalloc(size_t nmemb, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_MALLOC ZEND_ATTRIBUTE_ALLOC_SIZE2(1,2); 78 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); 79 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); 80 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); 81 ZEND_API void* ZEND_FASTCALL _safe_realloc(void *ptr, size_t nmemb, size_t size, size_t offset); 82 ZEND_API char* ZEND_FASTCALL _estrdup(const char *s ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_MALLOC; 83 ZEND_API char* ZEND_FASTCALL _estrndup(const char *s, size_t length ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_MALLOC; 84 ZEND_API size_t ZEND_FASTCALL _zend_mem_block_size(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); 85 86 #include "zend_alloc_sizes.h" 87 88 /* _emalloc() & _efree() specialization */ 89 #if !ZEND_DEBUG && defined(HAVE_BUILTIN_CONSTANT_P) 90 91 # define _ZEND_BIN_ALLOCATOR_DEF(_num, _size, _elements, _pages, x, y) \ 92 ZEND_API void* ZEND_FASTCALL _emalloc_ ## _size(void) ZEND_ATTRIBUTE_MALLOC; 93 94 ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_DEF, x, y) 95 96 ZEND_API void* ZEND_FASTCALL _emalloc_large(size_t size) ZEND_ATTRIBUTE_MALLOC ZEND_ATTRIBUTE_ALLOC_SIZE(1); 97 ZEND_API void* ZEND_FASTCALL _emalloc_huge(size_t size) ZEND_ATTRIBUTE_MALLOC ZEND_ATTRIBUTE_ALLOC_SIZE(1); 98 99 # define _ZEND_BIN_ALLOCATOR_SELECTOR_START(_num, _size, _elements, _pages, size, y) \ 100 ((size <= _size) ? _emalloc_ ## _size() : 101 # define _ZEND_BIN_ALLOCATOR_SELECTOR_END(_num, _size, _elements, _pages, size, y) \ 102 ) 103 104 # define ZEND_ALLOCATOR(size) \ 105 ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_SELECTOR_START, size, y) \ 106 ((size <= ZEND_MM_MAX_LARGE_SIZE) ? _emalloc_large(size) : _emalloc_huge(size)) \ 107 ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_SELECTOR_END, size, y) 108 109 # define _emalloc(size) \ 110 (__builtin_constant_p(size) ? \ 111 ZEND_ALLOCATOR(size) \ 112 : \ 113 _emalloc(size) \ 114 ) 115 116 # define _ZEND_BIN_DEALLOCATOR_DEF(_num, _size, _elements, _pages, x, y) \ 117 ZEND_API void ZEND_FASTCALL _efree_ ## _size(void *); 118 119 ZEND_MM_BINS_INFO(_ZEND_BIN_DEALLOCATOR_DEF, x, y) 120 121 ZEND_API void ZEND_FASTCALL _efree_large(void *, size_t size); 122 ZEND_API void ZEND_FASTCALL _efree_huge(void *, size_t size); 123 124 # define _ZEND_BIN_DEALLOCATOR_SELECTOR_START(_num, _size, _elements, _pages, ptr, size) \ 125 if (size <= _size) { _efree_ ## _size(ptr); } else 126 127 # define ZEND_DEALLOCATOR(ptr, size) \ 128 ZEND_MM_BINS_INFO(_ZEND_BIN_DEALLOCATOR_SELECTOR_START, ptr, size) \ 129 if (size <= ZEND_MM_MAX_LARGE_SIZE) { _efree_large(ptr, size); } \ 130 else { _efree_huge(ptr, size); } 131 132 # define efree_size(ptr, size) do { \ 133 if (__builtin_constant_p(size)) { \ 134 ZEND_DEALLOCATOR(ptr, size) \ 135 } else { \ 136 _efree(ptr); \ 137 } \ 138 } while (0) 139 # define efree_size_rel(ptr, size) \ 140 efree_size(ptr, size) 141 142 #else 143 144 # define efree_size(ptr, size) \ 145 efree(ptr) 146 # define efree_size_rel(ptr, size) \ 147 efree_rel(ptr) 148 149 #define _emalloc_large _emalloc 150 #define _emalloc_huge _emalloc 151 #define _efree_large _efree 152 #define _efree_huge _efree 153 154 #endif 155 156 /* Standard wrapper macros */ 157 #define emalloc(size) _emalloc((size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 158 #define emalloc_large(size) _emalloc_large((size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 159 #define emalloc_huge(size) _emalloc_huge((size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 160 #define safe_emalloc(nmemb, size, offset) _safe_emalloc((nmemb), (size), (offset) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 161 #define efree(ptr) _efree((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 162 #define efree_large(ptr) _efree_large((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 163 #define efree_huge(ptr) _efree_huge((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 164 #define ecalloc(nmemb, size) _ecalloc((nmemb), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 165 #define erealloc(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 166 #define erealloc2(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 167 #define safe_erealloc(ptr, nmemb, size, offset) _safe_erealloc((ptr), (nmemb), (size), (offset) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 168 #define erealloc_recoverable(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 169 #define erealloc2_recoverable(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 170 #define estrdup(s) _estrdup((s) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 171 #define estrndup(s, length) _estrndup((s), (length) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 172 #define zend_mem_block_size(ptr) _zend_mem_block_size((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 173 174 /* Relay wrapper macros */ 175 #define emalloc_rel(size) _emalloc((size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 176 #define safe_emalloc_rel(nmemb, size, offset) _safe_emalloc((nmemb), (size), (offset) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 177 #define efree_rel(ptr) _efree((ptr) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 178 #define ecalloc_rel(nmemb, size) _ecalloc((nmemb), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 179 #define erealloc_rel(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 180 #define erealloc2_rel(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 181 #define erealloc_recoverable_rel(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 182 #define erealloc2_recoverable_rel(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 183 #define safe_erealloc_rel(ptr, nmemb, size, offset) _safe_erealloc((ptr), (nmemb), (size), (offset) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 184 #define estrdup_rel(s) _estrdup((s) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 185 #define estrndup_rel(s, length) _estrndup((s), (length) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 186 #define zend_mem_block_size_rel(ptr) _zend_mem_block_size((ptr) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 187 188 ZEND_API void * __zend_malloc(size_t len) ZEND_ATTRIBUTE_MALLOC ZEND_ATTRIBUTE_ALLOC_SIZE(1); 189 ZEND_API void * __zend_calloc(size_t nmemb, size_t len) ZEND_ATTRIBUTE_MALLOC ZEND_ATTRIBUTE_ALLOC_SIZE2(1,2); 190 ZEND_API void * __zend_realloc(void *p, size_t len) ZEND_ATTRIBUTE_ALLOC_SIZE(2); 191 192 /* Selective persistent/non persistent allocation macros */ 193 #define pemalloc(size, persistent) ((persistent)?__zend_malloc(size):emalloc(size)) 194 #define safe_pemalloc(nmemb, size, offset, persistent) ((persistent)?_safe_malloc(nmemb, size, offset):safe_emalloc(nmemb, size, offset)) 195 #define pefree(ptr, persistent) ((persistent)?free(ptr):efree(ptr)) 196 #define pefree_size(ptr, size, persistent) do { \ 197 if (persistent) { \ 198 free(ptr); \ 199 } else { \ 200 efree_size(ptr, size);\ 201 } \ 202 } while (0) 203 204 #define pecalloc(nmemb, size, persistent) ((persistent)?__zend_calloc((nmemb), (size)):ecalloc((nmemb), (size))) 205 #define perealloc(ptr, size, persistent) ((persistent)?__zend_realloc((ptr), (size)):erealloc((ptr), (size))) 206 #define perealloc2(ptr, size, copy_size, persistent) ((persistent)?__zend_realloc((ptr), (size)):erealloc2((ptr), (size), (copy_size))) 207 #define safe_perealloc(ptr, nmemb, size, offset, persistent) ((persistent)?_safe_realloc((ptr), (nmemb), (size), (offset)):safe_erealloc((ptr), (nmemb), (size), (offset))) 208 #define perealloc_recoverable(ptr, size, persistent) ((persistent)?realloc((ptr), (size)):erealloc_recoverable((ptr), (size))) 209 #define perealloc2_recoverable(ptr, size, persistent) ((persistent)?realloc((ptr), (size)):erealloc2_recoverable((ptr), (size), (copy_size))) 210 #define pestrdup(s, persistent) ((persistent)?strdup(s):estrdup(s)) 211 #define pestrndup(s, length, persistent) ((persistent)?zend_strndup((s),(length)):estrndup((s),(length))) 212 213 #define pemalloc_rel(size, persistent) ((persistent)?__zend_malloc(size):emalloc_rel(size)) 214 #define pefree_rel(ptr, persistent) ((persistent)?free(ptr):efree_rel(ptr)) 215 #define pecalloc_rel(nmemb, size, persistent) ((persistent)?__zend_calloc((nmemb), (size)):ecalloc_rel((nmemb), (size))) 216 #define perealloc_rel(ptr, size, persistent) ((persistent)?__zend_realloc((ptr), (size)):erealloc_rel((ptr), (size))) 217 #define perealloc2_rel(ptr, size, copy_size, persistent) ((persistent)?__zend_realloc((ptr), (size)):erealloc2_rel((ptr), (size), (copy_size))) 218 #define perealloc_recoverable_rel(ptr, size, persistent) ((persistent)?realloc((ptr), (size)):erealloc_recoverable_rel((ptr), (size))) 219 #define perealloc2_recoverable_rel(ptr, size, copy_size, persistent) ((persistent)?realloc((ptr), (size)):erealloc2_recoverable_rel((ptr), (size), (copy_size))) 220 #define pestrdup_rel(s, persistent) ((persistent)?strdup(s):estrdup_rel(s)) 221 222 ZEND_API zend_result zend_set_memory_limit(size_t memory_limit); 223 ZEND_API bool zend_alloc_in_memory_limit_error_reporting(void); 224 225 ZEND_API void start_memory_manager(void); 226 ZEND_API void shutdown_memory_manager(bool silent, bool full_shutdown); 227 ZEND_API bool is_zend_mm(void); 228 ZEND_API bool is_zend_ptr(const void *ptr); 229 230 ZEND_API size_t zend_memory_usage(bool real_usage); 231 ZEND_API size_t zend_memory_peak_usage(bool real_usage); 232 233 /* fast cache for HashTables */ 234 #define ALLOC_HASHTABLE(ht) \ 235 (ht) = (HashTable *) emalloc(sizeof(HashTable)) 236 237 #define FREE_HASHTABLE(ht) \ 238 efree_size(ht, sizeof(HashTable)) 239 240 #define ALLOC_HASHTABLE_REL(ht) \ 241 (ht) = (HashTable *) emalloc_rel(sizeof(HashTable)) 242 243 #define FREE_HASHTABLE_REL(ht) \ 244 efree_size_rel(ht, sizeof(HashTable)) 245 246 /* Heap functions */ 247 typedef struct _zend_mm_heap zend_mm_heap; 248 249 ZEND_API zend_mm_heap *zend_mm_startup(void); 250 ZEND_API void zend_mm_shutdown(zend_mm_heap *heap, bool full_shutdown, bool silent); 251 ZEND_API void* ZEND_FASTCALL _zend_mm_alloc(zend_mm_heap *heap, size_t size ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_MALLOC; 252 ZEND_API void ZEND_FASTCALL _zend_mm_free(zend_mm_heap *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); 253 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); 254 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); 255 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); 256 257 #define zend_mm_alloc(heap, size) _zend_mm_alloc((heap), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 258 #define zend_mm_free(heap, p) _zend_mm_free((heap), (p) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 259 #define zend_mm_realloc(heap, p, size) _zend_mm_realloc((heap), (p), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 260 #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) 261 #define zend_mm_block_size(heap, p) _zend_mm_block_size((heap), (p) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 262 263 #define zend_mm_alloc_rel(heap, size) _zend_mm_alloc((heap), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 264 #define zend_mm_free_rel(heap, p) _zend_mm_free((heap), (p) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 265 #define zend_mm_realloc_rel(heap, p, size) _zend_mm_realloc((heap), (p), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 266 #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) 267 #define zend_mm_block_size_rel(heap, p) _zend_mm_block_size((heap), (p) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 268 269 ZEND_API zend_mm_heap *zend_mm_set_heap(zend_mm_heap *new_heap); 270 ZEND_API zend_mm_heap *zend_mm_get_heap(void); 271 272 ZEND_API size_t zend_mm_gc(zend_mm_heap *heap); 273 274 #define ZEND_MM_CUSTOM_HEAP_NONE 0 275 #define ZEND_MM_CUSTOM_HEAP_STD 1 276 #define ZEND_MM_CUSTOM_HEAP_DEBUG 2 277 278 ZEND_API bool zend_mm_is_custom_heap(zend_mm_heap *new_heap); 279 ZEND_API void zend_mm_set_custom_handlers(zend_mm_heap *heap, 280 void* (*_malloc)(size_t), 281 void (*_free)(void*), 282 void* (*_realloc)(void*, size_t)); 283 ZEND_API void zend_mm_get_custom_handlers(zend_mm_heap *heap, 284 void* (**_malloc)(size_t), 285 void (**_free)(void*), 286 void* (**_realloc)(void*, size_t)); 287 288 #if ZEND_DEBUG 289 ZEND_API void zend_mm_set_custom_debug_handlers(zend_mm_heap *heap, 290 void* (*_malloc)(size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), 291 void (*_free)(void* ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), 292 void* (*_realloc)(void*, size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)); 293 #endif 294 295 typedef struct _zend_mm_storage zend_mm_storage; 296 297 typedef void* (*zend_mm_chunk_alloc_t)(zend_mm_storage *storage, size_t size, size_t alignment); 298 typedef void (*zend_mm_chunk_free_t)(zend_mm_storage *storage, void *chunk, size_t size); 299 typedef bool (*zend_mm_chunk_truncate_t)(zend_mm_storage *storage, void *chunk, size_t old_size, size_t new_size); 300 typedef bool (*zend_mm_chunk_extend_t)(zend_mm_storage *storage, void *chunk, size_t old_size, size_t new_size); 301 302 typedef struct _zend_mm_handlers { 303 zend_mm_chunk_alloc_t chunk_alloc; 304 zend_mm_chunk_free_t chunk_free; 305 zend_mm_chunk_truncate_t chunk_truncate; 306 zend_mm_chunk_extend_t chunk_extend; 307 } zend_mm_handlers; 308 309 struct _zend_mm_storage { 310 const zend_mm_handlers handlers; 311 void *data; 312 }; 313 314 ZEND_API zend_mm_storage *zend_mm_get_storage(zend_mm_heap *heap); 315 ZEND_API zend_mm_heap *zend_mm_startup_ex(const zend_mm_handlers *handlers, void *data, size_t data_size); 316 317 /* 318 319 // The following example shows how to use zend_mm_heap API with custom storage 320 321 static zend_mm_heap *apc_heap = NULL; 322 static HashTable *apc_ht = NULL; 323 324 typedef struct _apc_data { 325 void *mem; 326 uint32_t free_pages; 327 } apc_data; 328 329 static void *apc_chunk_alloc(zend_mm_storage *storage, size_t size, size_t alignment) 330 { 331 apc_data *data = (apc_data*)(storage->data); 332 size_t real_size = ((size + (ZEND_MM_CHUNK_SIZE-1)) & ~(ZEND_MM_CHUNK_SIZE-1)); 333 uint32_t count = real_size / ZEND_MM_CHUNK_SIZE; 334 uint32_t first, last, i; 335 336 ZEND_ASSERT(alignment == ZEND_MM_CHUNK_SIZE); 337 338 for (first = 0; first < 32; first++) { 339 if (!(data->free_pages & (1 << first))) { 340 last = first; 341 do { 342 if (last - first == count - 1) { 343 for (i = first; i <= last; i++) { 344 data->free_pages |= (1 << i); 345 } 346 return (void *)(((char*)(data->mem)) + ZEND_MM_CHUNK_SIZE * (1 << first)); 347 } 348 last++; 349 } while (last < 32 && !(data->free_pages & (1 << last))); 350 first = last; 351 } 352 } 353 return NULL; 354 } 355 356 static void apc_chunk_free(zend_mm_storage *storage, void *chunk, size_t size) 357 { 358 apc_data *data = (apc_data*)(storage->data); 359 uint32_t i; 360 361 ZEND_ASSERT(((uintptr_t)chunk & (ZEND_MM_CHUNK_SIZE - 1)) == 0); 362 363 i = ((uintptr_t)chunk - (uintptr_t)(data->mem)) / ZEND_MM_CHUNK_SIZE; 364 while (1) { 365 data->free_pages &= ~(1 << i); 366 if (size <= ZEND_MM_CHUNK_SIZE) { 367 break; 368 } 369 size -= ZEND_MM_CHUNK_SIZE; 370 } 371 } 372 373 static void apc_init_heap(void) 374 { 375 zend_mm_handlers apc_handlers = { 376 apc_chunk_alloc, 377 apc_chunk_free, 378 NULL, 379 NULL, 380 }; 381 apc_data tmp_data; 382 zend_mm_heap *old_heap; 383 384 // Preallocate properly aligned SHM chunks (64MB) 385 tmp_data.mem = shm_memalign(ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE * 32); 386 387 // Initialize temporary storage data 388 tmp_data.free_pages = 0; 389 390 // Create heap 391 apc_heap = zend_mm_startup_ex(&apc_handlers, &tmp_data, sizeof(tmp_data)); 392 393 // Allocate some data in the heap 394 old_heap = zend_mm_set_heap(apc_heap); 395 ALLOC_HASHTABLE(apc_ht); 396 zend_hash_init(apc_ht, 64, NULL, ZVAL_PTR_DTOR, 0); 397 zend_mm_set_heap(old_heap); 398 } 399 400 */ 401 402 #ifdef ZTS 403 size_t zend_mm_globals_size(void); 404 #endif 405 406 END_EXTERN_C() 407 408 #endif 409
