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Overview
| Comment: | Allocation the mutex used by the Win32 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: |
535ed0ac5e8728ec91fc0a4cb54b8209 |
| User & Date: | mistachkin 2018-02-05 20:42:50 |
Context
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2018-02-05
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| 21:02 | Adjust the previous check-in, which modified the Win32 VFS, so that it works with SQLITE_OMIT_WAL. check-in: 36c2e67e user: mistachkin tags: trunk | |
| 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 | |
Changes
Changes to src/os_win.c.
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** is held when required. This function is only used as part of assert()
** statements. e.g.
**
** winShmEnterMutex()
** assert( winShmMutexHeld() );
** winShmLeaveMutex()
*/
static void winShmEnterMutex(void){
sqlite3_mutex_enter(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_VFS1));
}
static void winShmLeaveMutex(void){
sqlite3_mutex_leave(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_VFS1));
}
#ifndef NDEBUG
static int winShmMutexHeld(void) {
return sqlite3_mutex_held(sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_VFS1));
}
#endif
/*
** Object used to represent a single file opened and mmapped to provide
** shared memory. When multiple threads all reference the same
** log-summary, each thread has its own winFile object, but they all
................................................................................
sqlite3_vfs_register(&winNolockVfs, 0);
#if defined(SQLITE_WIN32_HAS_WIDE)
sqlite3_vfs_register(&winLongPathNolockVfs, 0);
#endif
return SQLITE_OK;
}
int sqlite3_os_end(void){
#if SQLITE_OS_WINRT
if( sleepObj!=NULL ){
osCloseHandle(sleepObj);
sleepObj = NULL;
}
#endif
return SQLITE_OK;
}
#endif /* SQLITE_OS_WIN */
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** is held when required. This function is only used as part of assert() ** statements. e.g. ** ** winShmEnterMutex() ** assert( winShmMutexHeld() ); ** winShmLeaveMutex() */ static sqlite3_mutex *winBigLock = 0; static void winShmEnterMutex(void){ sqlite3_mutex_enter(winBigLock); } static void winShmLeaveMutex(void){ sqlite3_mutex_leave(winBigLock); } #ifndef NDEBUG static int winShmMutexHeld(void) { return sqlite3_mutex_held(winBigLock); } #endif /* ** Object used to represent a single file opened and mmapped to provide ** shared memory. When multiple threads all reference the same ** log-summary, each thread has its own winFile object, but they all ................................................................................ sqlite3_vfs_register(&winNolockVfs, 0); #if defined(SQLITE_WIN32_HAS_WIDE) sqlite3_vfs_register(&winLongPathNolockVfs, 0); #endif winBigLock = sqlite3MutexAlloc(SQLITE_MUTEX_STATIC_VFS1); return SQLITE_OK; } int sqlite3_os_end(void){ #if SQLITE_OS_WINRT if( sleepObj!=NULL ){ osCloseHandle(sleepObj); sleepObj = NULL; } #endif winBigLock = 0; return SQLITE_OK; } #endif /* SQLITE_OS_WIN */ |