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

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FossilOrigin-Name: 44f8e3139aa3ad3fcce9028565dd9ad23bbe62a2
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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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16
src/btree.c
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@@ -9,7 +9,7 @@
** May you share freely, never taking more than you give.
**
*************************************************************************
** $Id: btree.c,v 1.287 2006/01/09 06:29:48 danielk1977 Exp $
** $Id: btree.c,v 1.288 2006/01/09 09:59:49 danielk1977 Exp $
**
** This file implements a external (disk-based) database using BTrees.
** For a detailed discussion of BTrees, refer to
@@ -6504,11 +6504,19 @@ int sqlite3BtreeLockTable(Btree *p, int iTab, u8 isWriteLock){
** Enable the shared pager and schema features.
*/
int sqlite3_enable_shared_cache(int enable){
ThreadData *pTsd = sqlite3ThreadData();
if( pTsd->pPager ){
ThreadData *pTd = sqlite3ThreadData();
/* It is only legal to call sqlite3_enable_shared_cache() when there
** are no currently open b-trees that were opened by the calling thread.
** This condition is only easy to detect if the shared-cache were
** previously enabled (and is being disabled).
*/
if( pTd->pBtree && !enable ){
assert( pTd->useSharedData );
return SQLITE_MISUSE;
}
pTsd->useSharedData = enable;
pTd->useSharedData = enable;
return SQLITE_OK;
}
#endif