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Overview
| Comment: | When SQLITE_OMIT_LOOKASIDE is set, do not allocate any lookaside memory since it will never be used. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
0ffd499f2374f2b191080b9952acfed5 |
| User & Date: | drh 2015-07-23 17:16:27 |
Context
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2015-07-23
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| 20:44 | Change the name of the OTA extension to RBU: Resumable Bulk Update. (check-in: 017c5019 user: drh tags: trunk) | |
| 17:16 | When SQLITE_OMIT_LOOKASIDE is set, do not allocate any lookaside memory since it will never be used. (check-in: 0ffd499f user: drh tags: trunk) | |
| 16:39 | The sqlite3ExprCodeGetColumn() is not guaranteed to put the result in the register requested. Fix the skip-scan code generator for WITHOUT ROWID tables so that it always checks the register and copies the result if it lands in the wrong register. Fix for ticket [8fd39115d8f46ece70e7d4b3]. (check-in: 793e206f user: drh tags: trunk) | |
Changes
Changes to src/main.c.
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** The sz parameter is the number of bytes in each lookaside slot.
** The cnt parameter is the number of slots. If pStart is NULL the
** space for the lookaside memory is obtained from sqlite3_malloc().
** If pStart is not NULL then it is sz*cnt bytes of memory to use for
** the lookaside memory.
*/
static int setupLookaside(sqlite3 *db, void *pBuf, int sz, int cnt){
void *pStart;
if( db->lookaside.nOut ){
return SQLITE_BUSY;
}
/* Free any existing lookaside buffer for this handle before
** allocating a new one so we don't have to have space for
** both at the same time.
................................................................................
db->lookaside.bMalloced = pBuf==0 ?1:0;
}else{
db->lookaside.pStart = db;
db->lookaside.pEnd = db;
db->lookaside.bEnabled = 0;
db->lookaside.bMalloced = 0;
}
return SQLITE_OK;
}
/*
** Return the mutex associated with a database connection.
*/
sqlite3_mutex *sqlite3_db_mutex(sqlite3 *db){
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** The sz parameter is the number of bytes in each lookaside slot.
** The cnt parameter is the number of slots. If pStart is NULL the
** space for the lookaside memory is obtained from sqlite3_malloc().
** If pStart is not NULL then it is sz*cnt bytes of memory to use for
** the lookaside memory.
*/
static int setupLookaside(sqlite3 *db, void *pBuf, int sz, int cnt){
#ifndef SQLITE_OMIT_LOOKASIDE
void *pStart;
if( db->lookaside.nOut ){
return SQLITE_BUSY;
}
/* Free any existing lookaside buffer for this handle before
** allocating a new one so we don't have to have space for
** both at the same time.
................................................................................
db->lookaside.bMalloced = pBuf==0 ?1:0;
}else{
db->lookaside.pStart = db;
db->lookaside.pEnd = db;
db->lookaside.bEnabled = 0;
db->lookaside.bMalloced = 0;
}
#endif /* SQLITE_OMIT_LOOKASIDE */
return SQLITE_OK;
}
/*
** Return the mutex associated with a database connection.
*/
sqlite3_mutex *sqlite3_db_mutex(sqlite3 *db){
|