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