Annotation of embedaddon/sqlite3/src/mem0.c, revision 1.1.1.1
1.1 misho 1: /*
2: ** 2008 October 28
3: **
4: ** The author disclaims copyright to this source code. In place of
5: ** a legal notice, here is a blessing:
6: **
7: ** May you do good and not evil.
8: ** May you find forgiveness for yourself and forgive others.
9: ** May you share freely, never taking more than you give.
10: **
11: *************************************************************************
12: **
13: ** This file contains a no-op memory allocation drivers for use when
14: ** SQLITE_ZERO_MALLOC is defined. The allocation drivers implemented
15: ** here always fail. SQLite will not operate with these drivers. These
16: ** are merely placeholders. Real drivers must be substituted using
17: ** sqlite3_config() before SQLite will operate.
18: */
19: #include "sqliteInt.h"
20:
21: /*
22: ** This version of the memory allocator is the default. It is
23: ** used when no other memory allocator is specified using compile-time
24: ** macros.
25: */
26: #ifdef SQLITE_ZERO_MALLOC
27:
28: /*
29: ** No-op versions of all memory allocation routines
30: */
31: static void *sqlite3MemMalloc(int nByte){ return 0; }
32: static void sqlite3MemFree(void *pPrior){ return; }
33: static void *sqlite3MemRealloc(void *pPrior, int nByte){ return 0; }
34: static int sqlite3MemSize(void *pPrior){ return 0; }
35: static int sqlite3MemRoundup(int n){ return n; }
36: static int sqlite3MemInit(void *NotUsed){ return SQLITE_OK; }
37: static void sqlite3MemShutdown(void *NotUsed){ return; }
38:
39: /*
40: ** This routine is the only routine in this file with external linkage.
41: **
42: ** Populate the low-level memory allocation function pointers in
43: ** sqlite3GlobalConfig.m with pointers to the routines in this file.
44: */
45: void sqlite3MemSetDefault(void){
46: static const sqlite3_mem_methods defaultMethods = {
47: sqlite3MemMalloc,
48: sqlite3MemFree,
49: sqlite3MemRealloc,
50: sqlite3MemSize,
51: sqlite3MemRoundup,
52: sqlite3MemInit,
53: sqlite3MemShutdown,
54: 0
55: };
56: sqlite3_config(SQLITE_CONFIG_MALLOC, &defaultMethods);
57: }
58:
59: #endif /* SQLITE_ZERO_MALLOC */
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