1 /* 2 +----------------------------------------------------------------------+ 3 | Zend Engine | 4 +----------------------------------------------------------------------+ 5 | Copyright (c) 1998-2017 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@zend.com> | 16 | Zeev Suraski <zeev@zend.com> | 17 | Dmitry Stogov <dmitry@zend.com> | 18 +----------------------------------------------------------------------+ 19 */ 20 21 /* $Id$ */ 22 23 #ifndef ZEND_ALLOC_H 24 #define ZEND_ALLOC_H 25 26 #include <stdio.h> 27 28 #include "../TSRM/TSRM.h" 29 #include "zend.h" 30 31 #ifndef ZEND_MM_ALIGNMENT 32 # define ZEND_MM_ALIGNMENT Z_L(8) 33 # define ZEND_MM_ALIGNMENT_LOG2 Z_L(3) 34 #elif ZEND_MM_ALIGNMENT < 4 35 # undef ZEND_MM_ALIGNMENT 36 # undef ZEND_MM_ALIGNMENT_LOG2 37 # define ZEND_MM_ALIGNMENT Z_L(4) 38 # define ZEND_MM_ALIGNMENT_LOG2 Z_L(2) 39 #endif 40 41 #define ZEND_MM_ALIGNMENT_MASK ~(ZEND_MM_ALIGNMENT - Z_L(1)) 42 43 #define ZEND_MM_ALIGNED_SIZE(size) (((size) + ZEND_MM_ALIGNMENT - Z_L(1)) & ZEND_MM_ALIGNMENT_MASK) 44 45 #define ZEND_MM_ALIGNED_SIZE_EX(size, alignment) \ 46 (((size) + ((alignment) - Z_L(1))) & ~((alignment) - Z_L(1))) 47 48 typedef struct _zend_leak_info { 49 void *addr; 50 size_t size; 51 const char *filename; 52 const char *orig_filename; 53 uint lineno; 54 uint orig_lineno; 55 } zend_leak_info; 56 57 #if ZEND_DEBUG 58 typedef struct _zend_mm_debug_info { 59 size_t size; 60 const char *filename; 61 const char *orig_filename; 62 uint lineno; 63 uint orig_lineno; 64 } zend_mm_debug_info; 65 66 # define ZEND_MM_OVERHEAD ZEND_MM_ALIGNED_SIZE(sizeof(zend_mm_debug_info)) 67 #else 68 # define ZEND_MM_OVERHEAD 0 69 #endif 70 71 BEGIN_EXTERN_C() 72 73 ZEND_API char* ZEND_FASTCALL zend_strndup(const char *s, size_t length) ZEND_ATTRIBUTE_MALLOC; 74 75 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); 76 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; 77 ZEND_API void* ZEND_FASTCALL _safe_malloc(size_t nmemb, size_t size, size_t offset) ZEND_ATTRIBUTE_MALLOC; 78 ZEND_API void ZEND_FASTCALL _efree(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); 79 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); 80 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); 81 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); 82 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); 83 ZEND_API void* ZEND_FASTCALL _safe_realloc(void *ptr, size_t nmemb, size_t size, size_t offset); 84 ZEND_API char* ZEND_FASTCALL _estrdup(const char *s ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_MALLOC; 85 ZEND_API char* ZEND_FASTCALL _estrndup(const char *s, size_t length ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC) ZEND_ATTRIBUTE_MALLOC; 86 ZEND_API size_t ZEND_FASTCALL _zend_mem_block_size(void *ptr ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); 87 88 #include "zend_alloc_sizes.h" 89 90 /* _emalloc() & _efree() specialization */ 91 #if !ZEND_DEBUG && defined(HAVE_BUILTIN_CONSTANT_P) 92 93 # define _ZEND_BIN_ALLOCATOR_DEF(_num, _size, _elements, _pages, x, y) \ 94 ZEND_API void* ZEND_FASTCALL _emalloc_ ## _size(void) ZEND_ATTRIBUTE_MALLOC; 95 96 ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_DEF, x, y) 97 98 ZEND_API void* ZEND_FASTCALL _emalloc_large(size_t size) ZEND_ATTRIBUTE_MALLOC ZEND_ATTRIBUTE_ALLOC_SIZE(1); 99 ZEND_API void* ZEND_FASTCALL _emalloc_huge(size_t size) ZEND_ATTRIBUTE_MALLOC ZEND_ATTRIBUTE_ALLOC_SIZE(1); 100 101 # define _ZEND_BIN_ALLOCATOR_SELECTOR_START(_num, _size, _elements, _pages, size, y) \ 102 ((size <= _size) ? _emalloc_ ## _size() : 103 # define _ZEND_BIN_ALLOCATOR_SELECTOR_END(_num, _size, _elements, _pages, size, y) \ 104 ) 105 106 # define ZEND_ALLOCATOR(size) \ 107 ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_SELECTOR_START, size, y) \ 108 ((size <= ZEND_MM_MAX_LARGE_SIZE) ? _emalloc_large(size) : _emalloc_huge(size)) \ 109 ZEND_MM_BINS_INFO(_ZEND_BIN_ALLOCATOR_SELECTOR_END, size, y) 110 111 # define _emalloc(size) \ 112 (__builtin_constant_p(size) ? \ 113 ZEND_ALLOCATOR(size) \ 114 : \ 115 _emalloc(size) \ 116 ) 117 118 # define _ZEND_BIN_DEALLOCATOR_DEF(_num, _size, _elements, _pages, x, y) \ 119 ZEND_API void ZEND_FASTCALL _efree_ ## _size(void *); 120 121 ZEND_MM_BINS_INFO(_ZEND_BIN_DEALLOCATOR_DEF, x, y) 122 123 ZEND_API void ZEND_FASTCALL _efree_large(void *, size_t size); 124 ZEND_API void ZEND_FASTCALL _efree_huge(void *, size_t size); 125 126 # define _ZEND_BIN_DEALLOCATOR_SELECTOR_START(_num, _size, _elements, _pages, ptr, size) \ 127 if (size <= _size) { _efree_ ## _size(ptr); } else 128 129 # define ZEND_DEALLOCATOR(ptr, size) \ 130 ZEND_MM_BINS_INFO(_ZEND_BIN_DEALLOCATOR_SELECTOR_START, ptr, size) \ 131 if (size <= ZEND_MM_MAX_LARGE_SIZE) { _efree_large(ptr, size); } \ 132 else { _efree_huge(ptr, size); } 133 134 # define efree_size(ptr, size) do { \ 135 if (__builtin_constant_p(size)) { \ 136 ZEND_DEALLOCATOR(ptr, size) \ 137 } else { \ 138 _efree(ptr); \ 139 } \ 140 } while (0) 141 # define efree_size_rel(ptr, size) \ 142 efree_size(ptr, size) 143 144 #else 145 146 # define efree_size(ptr, size) \ 147 efree(ptr) 148 # define efree_size_rel(ptr, size) \ 149 efree_rel(ptr) 150 151 #define _emalloc_large _emalloc 152 #define _emalloc_huge _emalloc 153 #define _efree_large _efree 154 #define _efree_huge _efree 155 156 #endif 157 158 /* Standard wrapper macros */ 159 #define emalloc(size) _emalloc((size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 160 #define emalloc_large(size) _emalloc_large((size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 161 #define emalloc_huge(size) _emalloc_huge((size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 162 #define safe_emalloc(nmemb, size, offset) _safe_emalloc((nmemb), (size), (offset) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 163 #define efree(ptr) _efree((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 164 #define efree_large(ptr) _efree_large((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 165 #define efree_huge(ptr) _efree_huge((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 166 #define ecalloc(nmemb, size) _ecalloc((nmemb), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 167 #define erealloc(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 168 #define erealloc2(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 169 #define safe_erealloc(ptr, nmemb, size, offset) _safe_erealloc((ptr), (nmemb), (size), (offset) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 170 #define erealloc_recoverable(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 171 #define erealloc2_recoverable(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 172 #define estrdup(s) _estrdup((s) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 173 #define estrndup(s, length) _estrndup((s), (length) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 174 #define zend_mem_block_size(ptr) _zend_mem_block_size((ptr) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 175 176 /* Relay wrapper macros */ 177 #define emalloc_rel(size) _emalloc((size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 178 #define safe_emalloc_rel(nmemb, size, offset) _safe_emalloc((nmemb), (size), (offset) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 179 #define efree_rel(ptr) _efree((ptr) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 180 #define ecalloc_rel(nmemb, size) _ecalloc((nmemb), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 181 #define erealloc_rel(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 182 #define erealloc2_rel(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 183 #define erealloc_recoverable_rel(ptr, size) _erealloc((ptr), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 184 #define erealloc2_recoverable_rel(ptr, size, copy_size) _erealloc2((ptr), (size), (copy_size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 185 #define safe_erealloc_rel(ptr, nmemb, size, offset) _safe_erealloc((ptr), (nmemb), (size), (offset) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 186 #define estrdup_rel(s) _estrdup((s) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 187 #define estrndup_rel(s, length) _estrndup((s), (length) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 188 #define zend_mem_block_size_rel(ptr) _zend_mem_block_size((ptr) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 189 190 ZEND_API void * __zend_malloc(size_t len) ZEND_ATTRIBUTE_MALLOC ZEND_ATTRIBUTE_ALLOC_SIZE(1); 191 ZEND_API void * __zend_calloc(size_t nmemb, size_t len) ZEND_ATTRIBUTE_MALLOC ZEND_ATTRIBUTE_ALLOC_SIZE2(1,2); 192 ZEND_API void * __zend_realloc(void *p, size_t len) ZEND_ATTRIBUTE_ALLOC_SIZE(2); 193 194 /* Selective persistent/non persistent allocation macros */ 195 #define pemalloc(size, persistent) ((persistent)?__zend_malloc(size):emalloc(size)) 196 #define safe_pemalloc(nmemb, size, offset, persistent) ((persistent)?_safe_malloc(nmemb, size, offset):safe_emalloc(nmemb, size, offset)) 197 #define pefree(ptr, persistent) ((persistent)?free(ptr):efree(ptr)) 198 #define pefree_size(ptr, size, persistent) ((persistent)?free(ptr):efree_size(ptr, size)) 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)?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 int zend_set_memory_limit(size_t memory_limit); 218 219 ZEND_API void start_memory_manager(void); 220 ZEND_API void shutdown_memory_manager(int silent, int full_shutdown); 221 ZEND_API int is_zend_mm(void); 222 223 ZEND_API size_t zend_memory_usage(int real_usage); 224 ZEND_API size_t zend_memory_peak_usage(int real_usage); 225 226 /* fast cache for HashTables */ 227 #define ALLOC_HASHTABLE(ht) \ 228 (ht) = (HashTable *) emalloc(sizeof(HashTable)) 229 230 #define FREE_HASHTABLE(ht) \ 231 efree_size(ht, sizeof(HashTable)) 232 233 #define ALLOC_HASHTABLE_REL(ht) \ 234 (ht) = (HashTable *) emalloc_rel(sizeof(HashTable)) 235 236 #define FREE_HASHTABLE_REL(ht) \ 237 efree_size_rel(ht, sizeof(HashTable)) 238 239 /* Heap functions */ 240 typedef struct _zend_mm_heap zend_mm_heap; 241 242 ZEND_API zend_mm_heap *zend_mm_startup(void); 243 ZEND_API void zend_mm_shutdown(zend_mm_heap *heap, int full_shutdown, int silent); 244 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; 245 ZEND_API void ZEND_FASTCALL _zend_mm_free(zend_mm_heap *heap, void *p ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC); 246 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); 247 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); 248 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); 249 250 #define zend_mm_alloc(heap, size) _zend_mm_alloc((heap), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 251 #define zend_mm_free(heap, p) _zend_mm_free((heap), (p) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 252 #define zend_mm_realloc(heap, p, size) _zend_mm_realloc((heap), (p), (size) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 253 #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) 254 #define zend_mm_block_size(heap, p) _zend_mm_block_size((heap), (p) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 255 256 #define zend_mm_alloc_rel(heap, size) _zend_mm_alloc((heap), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 257 #define zend_mm_free_rel(heap, p) _zend_mm_free((heap), (p) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 258 #define zend_mm_realloc_rel(heap, p, size) _zend_mm_realloc((heap), (p), (size) ZEND_FILE_LINE_RELAY_CC ZEND_FILE_LINE_CC) 259 #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) 260 #define zend_mm_block_size_rel(heap, p) _zend_mm_block_size((heap), (p) ZEND_FILE_LINE_CC ZEND_FILE_LINE_EMPTY_CC) 261 262 ZEND_API zend_mm_heap *zend_mm_set_heap(zend_mm_heap *new_heap); 263 ZEND_API zend_mm_heap *zend_mm_get_heap(void); 264 265 ZEND_API size_t zend_mm_gc(zend_mm_heap *heap); 266 267 #define ZEND_MM_CUSTOM_HEAP_NONE 0 268 #define ZEND_MM_CUSTOM_HEAP_STD 1 269 #define ZEND_MM_CUSTOM_HEAP_DEBUG 2 270 271 ZEND_API int zend_mm_is_custom_heap(zend_mm_heap *new_heap); 272 ZEND_API void zend_mm_set_custom_handlers(zend_mm_heap *heap, 273 void* (*_malloc)(size_t), 274 void (*_free)(void*), 275 void* (*_realloc)(void*, size_t)); 276 ZEND_API void zend_mm_get_custom_handlers(zend_mm_heap *heap, 277 void* (**_malloc)(size_t), 278 void (**_free)(void*), 279 void* (**_realloc)(void*, size_t)); 280 281 #if ZEND_DEBUG 282 ZEND_API void zend_mm_set_custom_debug_handlers(zend_mm_heap *heap, 283 void* (*_malloc)(size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), 284 void (*_free)(void* ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC), 285 void* (*_realloc)(void*, size_t ZEND_FILE_LINE_DC ZEND_FILE_LINE_ORIG_DC)); 286 #endif 287 288 typedef struct _zend_mm_storage zend_mm_storage; 289 290 typedef void* (*zend_mm_chunk_alloc_t)(zend_mm_storage *storage, size_t size, size_t alignment); 291 typedef void (*zend_mm_chunk_free_t)(zend_mm_storage *storage, void *chunk, size_t size); 292 typedef int (*zend_mm_chunk_truncate_t)(zend_mm_storage *storage, void *chunk, size_t old_size, size_t new_size); 293 typedef int (*zend_mm_chunk_extend_t)(zend_mm_storage *storage, void *chunk, size_t old_size, size_t new_size); 294 295 typedef struct _zend_mm_handlers { 296 zend_mm_chunk_alloc_t chunk_alloc; 297 zend_mm_chunk_free_t chunk_free; 298 zend_mm_chunk_truncate_t chunk_truncate; 299 zend_mm_chunk_extend_t chunk_extend; 300 } zend_mm_handlers; 301 302 struct _zend_mm_storage { 303 const zend_mm_handlers handlers; 304 void *data; 305 }; 306 307 ZEND_API zend_mm_storage *zend_mm_get_storage(zend_mm_heap *heap); 308 ZEND_API zend_mm_heap *zend_mm_startup_ex(const zend_mm_handlers *handlers, void *data, size_t data_size); 309 310 /* 311 312 // The following example shows how to use zend_mm_heap API with custom storage 313 314 static zend_mm_heap *apc_heap = NULL; 315 static HashTable *apc_ht = NULL; 316 317 typedef struct _apc_data { 318 void *mem; 319 uint32_t free_pages; 320 } apc_data; 321 322 static void *apc_chunk_alloc(zend_mm_storage *storage, size_t size, size_t alignment) 323 { 324 apc_data *data = (apc_data*)(storage->data); 325 size_t real_size = ((size + (ZEND_MM_CHUNK_SIZE-1)) & ~(ZEND_MM_CHUNK_SIZE-1)); 326 uint32_t count = real_size / ZEND_MM_CHUNK_SIZE; 327 uint32_t first, last, i; 328 329 ZEND_ASSERT(alignment == ZEND_MM_CHUNK_SIZE); 330 331 for (first = 0; first < 32; first++) { 332 if (!(data->free_pages & (1 << first))) { 333 last = first; 334 do { 335 if (last - first == count - 1) { 336 for (i = first; i <= last; i++) { 337 data->free_pages |= (1 << i); 338 } 339 return (void *)(((char*)(data->mem)) + ZEND_MM_CHUNK_SIZE * (1 << first)); 340 } 341 last++; 342 } while (last < 32 && !(data->free_pages & (1 << last))); 343 first = last; 344 } 345 } 346 return NULL; 347 } 348 349 static void apc_chunk_free(zend_mm_storage *storage, void *chunk, size_t size) 350 { 351 apc_data *data = (apc_data*)(storage->data); 352 uint32_t i; 353 354 ZEND_ASSERT(((uintptr_t)chunk & (ZEND_MM_CHUNK_SIZE - 1)) == 0); 355 356 i = ((uintptr_t)chunk - (uintptr_t)(data->mem)) / ZEND_MM_CHUNK_SIZE; 357 while (1) { 358 data->free_pages &= ~(1 << i); 359 if (size <= ZEND_MM_CHUNK_SIZE) { 360 break; 361 } 362 size -= ZEND_MM_CHUNK_SIZE; 363 } 364 } 365 366 static void apc_init_heap(void) 367 { 368 zend_mm_handlers apc_handlers = { 369 apc_chunk_alloc, 370 apc_chunk_free, 371 NULL, 372 NULL, 373 }; 374 apc_data tmp_data; 375 zend_mm_heap *old_heap; 376 377 // Preallocate properly aligned SHM chunks (64MB) 378 tmp_data.mem = shm_memalign(ZEND_MM_CHUNK_SIZE, ZEND_MM_CHUNK_SIZE * 32); 379 380 // Initialize temporary storage data 381 tmp_data.free_pages = 0; 382 383 // Create heap 384 apc_heap = zend_mm_startup_ex(&apc_handlers, &tmp_data, sizeof(tmp_data)); 385 386 // Allocate some data in the heap 387 old_heap = zend_mm_set_heap(apc_heap); 388 ALLOC_HASHTABLE(apc_ht); 389 zend_hash_init(apc_ht, 64, NULL, ZVAL_PTR_DTOR, 0); 390 zend_mm_set_heap(old_heap); 391 } 392 393 */ 394 395 END_EXTERN_C() 396 397 #endif 398 399 /* 400 * Local variables: 401 * tab-width: 4 402 * c-basic-offset: 4 403 * indent-tabs-mode: t 404 * End: 405 */ 406