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Add a runtime interface to enable memory-management features. (CVS 2894)

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FossilOrigin-Name: 44f8e3139aa3ad3fcce9028565dd9ad23bbe62a2
This commit is contained in:
danielk1977
2006-01-09 09:59:49 +00:00
parent e501b89ada
commit 52622828ce
9 changed files with 156 additions and 68 deletions
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28
src/pager.c
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@@ -18,7 +18,7 @@
** file simultaneously, or one process from reading the database while
** another is writing.
**
** @(#) $Id: pager.c,v 1.232 2006/01/09 06:29:49 danielk1977 Exp $
** @(#) $Id: pager.c,v 1.233 2006/01/09 09:59:49 danielk1977 Exp $
*/
#ifndef SQLITE_OMIT_DISKIO
#include "sqliteInt.h"
@@ -1623,7 +1623,9 @@ int sqlite3pager_open(
int useJournal = (flags & PAGER_OMIT_JOURNAL)==0;
int noReadlock = (flags & PAGER_NO_READLOCK)!=0;
char zTemp[SQLITE_TEMPNAME_SIZE];
#ifndef SQLITE_OMIT_MEMORY_MANAGEMENT
ThreadData *pTsd = sqlite3ThreadData();
#endif
/* If malloc() has already failed return SQLITE_NOMEM. Before even
** testing for this, set *ppPager to NULL so the caller knows the pager
@@ -1723,8 +1725,12 @@ int sqlite3pager_open(
pPager->pBusyHandler = 0;
memset(pPager->aHash, 0, sizeof(pPager->aHash));
*ppPager = pPager;
pPager->pNext = pTsd->pPager;
pTsd->pPager = pPager;
#ifndef SQLITE_OMIT_MEMORY_MANAGEMENT
if( pTsd->useMemoryManagement ){
pPager->pNext = pTsd->pPager;
pTsd->pPager = pPager;
}
#endif
return SQLITE_OK;
}
@@ -2088,14 +2094,16 @@ int sqlite3pager_close(Pager *pPager){
#ifndef SQLITE_OMIT_MEMORY_MANAGEMENT
/* Remove the pager from the linked list of pagers starting at
** ThreadData.pPager.
** ThreadData.pPager if memory-management is enabled.
*/
if( pPager==pTsd->pPager ){
pTsd->pPager = pPager->pNext;
}else{
Pager *pTmp;
for(pTmp = pTsd->pPager; pTmp->pNext!=pPager; pTmp=pTmp->pNext);
pTmp->pNext = pPager->pNext;
if( pTsd->useMemoryManagement ){
if( pPager==pTsd->pPager ){
pTsd->pPager = pPager->pNext;
}else{
Pager *pTmp;
for(pTmp = pTsd->pPager; pTmp->pNext!=pPager; pTmp=pTmp->pNext);
pTmp->pNext = pPager->pNext;
}
}
#endif