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Overview
| Comment: | When an assignment occurs in a boolean, always test the result using "!=0" to avoid confusion and make it clear that assignment is intended, not an equality test. Ticket #3491. (CVS 5879) |
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| Downloads: | Tarball | ZIP archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
89ee5295bdea6f2c093eb6a44d69917d |
| User & Date: | drh 2008-11-11 00:36:17.000 |
Context
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2008-11-11
| ||
| 15:48 | Avoid signed/unsigned comparison warnings in bitvec.c by changing the types of loop variables to unsigned int. (CVS 5880) (check-in: da869446c5 user: drh tags: trunk) | |
| 00:36 | When an assignment occurs in a boolean, always test the result using "!=0" to avoid confusion and make it clear that assignment is intended, not an equality test. Ticket #3491. (CVS 5879) (check-in: 89ee5295bd user: drh tags: trunk) | |
| 00:30 | Fix the CLI so that it does not terminate input when an Oracle or MS-SQL command terminator mark is seen in the middle of a string literal. Ticket #3490. (CVS 5878) (check-in: 68662e3b48 user: drh tags: trunk) | |
Changes
Changes to src/pcache.c.
1 2 3 4 5 6 7 8 9 10 11 12 13 | /* ** 2008 August 05 ** ** The author disclaims copyright to this source code. In place of ** a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** This file implements that page cache. ** | | | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 | /* ** 2008 August 05 ** ** The author disclaims copyright to this source code. In place of ** a legal notice, here is a blessing: ** ** May you do good and not evil. ** May you find forgiveness for yourself and forgive others. ** May you share freely, never taking more than you give. ** ************************************************************************* ** This file implements that page cache. ** ** @(#) $Id: pcache.c,v 1.35 2008/11/11 00:36:17 drh Exp $ */ #include "sqliteInt.h" /* ** A complete page cache is an instance of this structure. ** ** A cache may only be deleted by its owner and while holding the |
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** A pointer to the recycled page is returned, or NULL if no page is
** eligible for recycling.
*/
static PgHdr *pcacheRecyclePage(void){
PgHdr *p = 0;
assert( sqlite3_mutex_held(pcache_g.mutex) );
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** A pointer to the recycled page is returned, or NULL if no page is
** eligible for recycling.
*/
static PgHdr *pcacheRecyclePage(void){
PgHdr *p = 0;
assert( sqlite3_mutex_held(pcache_g.mutex) );
if( (p=pcache_g.pLruTail)!=0 ){
assert( (p->flags&PGHDR_DIRTY)==0 );
pcacheRemoveFromLruList(p);
pcacheRemoveFromHash(p);
pcacheRemoveFromList(&p->pCache->pClean, p);
}
return p;
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/*
** If there are currently more than pcache.nMaxPage pages allocated, try
** to recycle pages to reduce the number allocated to pcache.nMaxPage.
*/
static void pcacheEnforceMaxPage(void){
PgHdr *p;
assert( sqlite3_mutex_held(pcache_g.mutex) );
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/*
** If there are currently more than pcache.nMaxPage pages allocated, try
** to recycle pages to reduce the number allocated to pcache.nMaxPage.
*/
static void pcacheEnforceMaxPage(void){
PgHdr *p;
assert( sqlite3_mutex_held(pcache_g.mutex) );
while( pcache_g.nCurrentPage>pcache_g.nMaxPage
&& (p = pcacheRecyclePage())!=0 ){
pcachePageFree(p);
}
}
/*
** Close a cache.
*/
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