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*/
31static void *sqlite3MemMalloc(int nByte){ return 0; }
32static void sqlite3MemFree(void *pPrior){ return; }
33static void *sqlite3MemRealloc(void *pPrior, int nByte){ return 0; }
34static int sqlite3MemSize(void *pPrior){ return 0; }
35static int sqlite3MemRoundup(int n){ return n; }
36static int sqlite3MemInit(void *NotUsed){ return SQLITE_OK; }
37static 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*/
45void 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 */
60