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Overview
| Comment: | Small size reduction and performance increase for releaseMemArray(). |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
24cd32d681df58f687b2afbe4b13d579 |
| User & Date: | drh 2014-09-19 16:13:12 |
Context
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2014-09-19
| ||
| 16:56 | Remove a local variable from the OP_Column implementation, resulting in a modest size reduction and a performance increase. check-in: 6199760d user: drh tags: trunk | |
| 16:13 | Small size reduction and performance increase for releaseMemArray(). check-in: 24cd32d6 user: drh tags: trunk | |
| 16:02 | Updates to comments. No code changes. check-in: 9b42c3da user: drh tags: trunk | |
Changes
Changes to src/vdbeaux.c.
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#endif
/*
** Release an array of N Mem elements
*/
static void releaseMemArray(Mem *p, int N){
if( p && N ){
Mem *pEnd;
sqlite3 *db = p->db;
u8 malloc_failed = db->mallocFailed;
if( db->pnBytesFreed ){
for(pEnd=&p[N]; p<pEnd; p++){
if( p->szMalloc ) sqlite3DbFree(db, p->zMalloc);
}
return;
}
for(pEnd=&p[N]; p<pEnd; p++){
assert( (&p[1])==pEnd || p[0].db==p[1].db );
assert( sqlite3VdbeCheckMemInvariants(p) );
/* This block is really an inlined version of sqlite3VdbeMemRelease()
** that takes advantage of the fact that the memory cell value is
** being set to NULL after releasing any dynamic resources.
**
................................................................................
sqlite3VdbeMemRelease(p);
}else if( p->szMalloc ){
sqlite3DbFree(db, p->zMalloc);
p->szMalloc = 0;
}
p->flags = MEM_Undefined;
}
db->mallocFailed = malloc_failed;
}
}
/*
** Delete a VdbeFrame object and its contents. VdbeFrame objects are
** allocated by the OP_Program opcode in sqlite3VdbeExec().
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#endif
/*
** Release an array of N Mem elements
*/
static void releaseMemArray(Mem *p, int N){
if( p && N ){
Mem *pEnd = &p[N];
sqlite3 *db = p->db;
u8 malloc_failed = db->mallocFailed;
if( db->pnBytesFreed ){
do{
if( p->szMalloc ) sqlite3DbFree(db, p->zMalloc);
}while( (++p)<pEnd );
return;
}
do{
assert( (&p[1])==pEnd || p[0].db==p[1].db );
assert( sqlite3VdbeCheckMemInvariants(p) );
/* This block is really an inlined version of sqlite3VdbeMemRelease()
** that takes advantage of the fact that the memory cell value is
** being set to NULL after releasing any dynamic resources.
**
................................................................................
sqlite3VdbeMemRelease(p);
}else if( p->szMalloc ){
sqlite3DbFree(db, p->zMalloc);
p->szMalloc = 0;
}
p->flags = MEM_Undefined;
}while( (++p)<pEnd );
db->mallocFailed = malloc_failed;
}
}
/*
** Delete a VdbeFrame object and its contents. VdbeFrame objects are
** allocated by the OP_Program opcode in sqlite3VdbeExec().
|