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Overview
| Comment: | Minor clean-up of previous mem5 allocator fix. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
3643842316239ff7859f0ec522736a2b |
| User & Date: | shaneh 2011-03-10 03:54:55 |
Context
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2011-03-10
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| 21:13 | Skip unique constraint enforcement if compiled with SQLITE_OMIT_UNIQUE_ENFORCEMENT. check-in: ba85bf8c user: shaneh tags: trunk | |
| 03:54 | Minor clean-up of previous mem5 allocator fix. check-in: 36438423 user: shaneh tags: trunk | |
|
2011-03-09
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| 21:36 | Fix issue with mem5 allocator when min request size is larger thatn 2^30. check-in: d7dae06f user: shaneh tags: trunk | |
Changes
Changes to src/mem5.c.
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** memsys5Log(4) -> 2
** memsys5Log(5) -> 3
** memsys5Log(8) -> 3
** memsys5Log(9) -> 4
*/
static int memsys5Log(int iValue){
int iLog;
for(iLog=0; (iLog<((sizeof(int)*8)-2)) && (1<<iLog)<iValue; iLog++);
return iLog;
}
/*
** Initialize the memory allocator.
**
** This routine is not threadsafe. The caller must be holding a mutex
................................................................................
assert( (sizeof(Mem5Link)&(sizeof(Mem5Link)-1))==0 );
nByte = sqlite3GlobalConfig.nHeap;
zByte = (u8*)sqlite3GlobalConfig.pHeap;
assert( zByte!=0 ); /* sqlite3_config() does not allow otherwise */
/* boundaries on sqlite3GlobalConfig.mnReq are enforced in sqlite3_config() */
nMinLog = sqlite3GlobalConfig.mnReq;
assert( nMinLog>0 && nMinLog<=(1<<12) );
nMinLog = memsys5Log(nMinLog);
mem5.szAtom = (1<<nMinLog);
while( (int)sizeof(Mem5Link)>mem5.szAtom ){
mem5.szAtom = mem5.szAtom << 1;
}
mem5.nBlock = (nByte / (mem5.szAtom+sizeof(u8)));
mem5.zPool = zByte;
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** memsys5Log(4) -> 2
** memsys5Log(5) -> 3
** memsys5Log(8) -> 3
** memsys5Log(9) -> 4
*/
static int memsys5Log(int iValue){
int iLog;
for(iLog=0; (iLog<((sizeof(int)*8)-1)) && (1<<iLog)<iValue; iLog++);
return iLog;
}
/*
** Initialize the memory allocator.
**
** This routine is not threadsafe. The caller must be holding a mutex
................................................................................
assert( (sizeof(Mem5Link)&(sizeof(Mem5Link)-1))==0 );
nByte = sqlite3GlobalConfig.nHeap;
zByte = (u8*)sqlite3GlobalConfig.pHeap;
assert( zByte!=0 ); /* sqlite3_config() does not allow otherwise */
/* boundaries on sqlite3GlobalConfig.mnReq are enforced in sqlite3_config() */
nMinLog = memsys5Log(sqlite3GlobalConfig.mnReq);
mem5.szAtom = (1<<nMinLog);
while( (int)sizeof(Mem5Link)>mem5.szAtom ){
mem5.szAtom = mem5.szAtom << 1;
}
mem5.nBlock = (nByte / (mem5.szAtom+sizeof(u8)));
mem5.zPool = zByte;
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