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Overview
| Comment: | Allocation the mutex used by the unix VFS only once at initialization, instead of every time it is needed. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: | 5764dc160783f5c4017204b3e26a89d3 |
| User & Date: | drh 2018-02-05 16:39:12 |
Context
|
2018-02-05
| ||
| 20:42 | Allocation the mutex used by the Win32 VFS only once at initialization, instead of every time it is needed. check-in: 535ed0ac user: mistachkin tags: trunk | |
| 16:39 | Allocation the mutex used by the unix VFS only once at initialization, instead of every time it is needed. check-in: 5764dc16 user: drh tags: trunk | |
| 13:42 | Fix another minor problem in walro2.test. check-in: ba0631de user: dan tags: trunk | |
Changes
Changes to src/os_unix.c.
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** is held when required. This function is only used as part of assert()
** statements. e.g.
**
** unixEnterMutex()
** assert( unixMutexHeld() );
** unixEnterLeave()
*/
static void unixEnterMutex(void){
sqlite3_mutex_enter(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_VFS1));
}
static void unixLeaveMutex(void){
sqlite3_mutex_leave(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_VFS1));
}
#ifdef SQLITE_DEBUG
static int unixMutexHeld(void) {
return sqlite3_mutex_held(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_VFS1));
}
#endif
#ifdef SQLITE_HAVE_OS_TRACE
/*
** Helper function for printing out trace information from debugging
................................................................................
** the same instant might all reset the PRNG. But multiple resets
** are harmless.
*/
if( randomnessPid!=osGetpid(0) ){
randomnessPid = osGetpid(0);
sqlite3_randomness(0,0);
}
memset(p, 0, sizeof(unixFile));
if( eType==SQLITE_OPEN_MAIN_DB ){
UnixUnusedFd *pUnused;
pUnused = findReusableFd(zName, flags);
if( pUnused ){
fd = pUnused->fd;
................................................................................
** correctly. See ticket [bb3a86e890c8e96ab] */
assert( ArraySize(aSyscall)==29 );
/* Register all VFSes defined in the aVfs[] array */
for(i=0; i<(sizeof(aVfs)/sizeof(sqlite3_vfs)); i++){
sqlite3_vfs_register(&aVfs[i], i==0);
}
return SQLITE_OK;
}
/*
** Shutdown the operating system interface.
**
** Some operating systems might need to do some cleanup in this routine,
** to release dynamically allocated objects. But not on unix.
** This routine is a no-op for unix.
*/
int sqlite3_os_end(void){
return SQLITE_OK;
}
#endif /* SQLITE_OS_UNIX */
|
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** is held when required. This function is only used as part of assert() ** statements. e.g. ** ** unixEnterMutex() ** assert( unixMutexHeld() ); ** unixEnterLeave() */ static sqlite3_mutex *unixBigLock = 0; static void unixEnterMutex(void){ sqlite3_mutex_enter(unixBigLock); } static void unixLeaveMutex(void){ sqlite3_mutex_leave(unixBigLock); } #ifdef SQLITE_DEBUG static int unixMutexHeld(void) { return sqlite3_mutex_held(unixBigLock); } #endif #ifdef SQLITE_HAVE_OS_TRACE /* ** Helper function for printing out trace information from debugging ................................................................................ ** the same instant might all reset the PRNG. But multiple resets ** are harmless. */ if( randomnessPid!=osGetpid(0) ){ randomnessPid = osGetpid(0); sqlite3_randomness(0,0); } memset(p, 0, sizeof(unixFile)); if( eType==SQLITE_OPEN_MAIN_DB ){ UnixUnusedFd *pUnused; pUnused = findReusableFd(zName, flags); if( pUnused ){ fd = pUnused->fd; ................................................................................ ** correctly. See ticket [bb3a86e890c8e96ab] */ assert( ArraySize(aSyscall)==29 ); /* Register all VFSes defined in the aVfs[] array */ for(i=0; i<(sizeof(aVfs)/sizeof(sqlite3_vfs)); i++){ sqlite3_vfs_register(&aVfs[i], i==0); } unixBigLock = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_VFS1); return SQLITE_OK; } /* ** Shutdown the operating system interface. ** ** Some operating systems might need to do some cleanup in this routine, ** to release dynamically allocated objects. But not on unix. ** This routine is a no-op for unix. */ int sqlite3_os_end(void){ unixBigLock = 0; return SQLITE_OK; } #endif /* SQLITE_OS_UNIX */ |