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Overview
| Comment: | Expand the header comment to clarify the purpose for the sqlite3MemoryBarrier() function. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
b89495ae09aa0e9652475b2ba1943dfd |
| User & Date: | drh 2015-09-26 03:23:29 |
Context
|
2015-09-26
| ||
| 03:31 | Fix the title of the documentation on sqlite3_value_subtype(). This is a comment change only. check-in: b7902354 user: drh tags: trunk | |
| 03:23 | Expand the header comment to clarify the purpose for the sqlite3MemoryBarrier() function. check-in: b89495ae user: drh tags: trunk | |
| 01:28 | Remove an assert in the windows worker-thread logic that can fail in a race condition. check-in: d7bfb960 user: drh tags: trunk | |
Changes
Changes to src/mutex_unix.c.
77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 |
}
static int pthreadMutexNotheld(sqlite3_mutex *p){
return p->nRef==0 || pthread_equal(p->owner, pthread_self())==0;
}
#endif
/*
** Try to provide a memory barrier operation, needed for initialization only.
*/
void sqlite3MemoryBarrier(void){
#if defined(SQLITE_MEMORY_BARRIER)
SQLITE_MEMORY_BARRIER;
#elif defined(__GNUC__) && GCC_VERSION>=4001000
__sync_synchronize();
#endif
|
| > > |
77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 |
}
static int pthreadMutexNotheld(sqlite3_mutex *p){
return p->nRef==0 || pthread_equal(p->owner, pthread_self())==0;
}
#endif
/*
** Try to provide a memory barrier operation, needed for initialization
** and also for the implementation of xShmBarrier in the VFS in cases
** where SQLite is compiled without mutexes.
*/
void sqlite3MemoryBarrier(void){
#if defined(SQLITE_MEMORY_BARRIER)
SQLITE_MEMORY_BARRIER;
#elif defined(__GNUC__) && GCC_VERSION>=4001000
__sync_synchronize();
#endif
|
Changes to src/mutex_w32.c.
74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 |
static int winMutexNotheld(sqlite3_mutex *p){
DWORD tid = GetCurrentThreadId();
return winMutexNotheld2(p, tid);
}
#endif
/*
** Try to provide a memory barrier operation, needed for initialization only.
*/
void sqlite3MemoryBarrier(void){
#if defined(SQLITE_MEMORY_BARRIER)
SQLITE_MEMORY_BARRIER;
#elif defined(__GNUC__)
__sync_synchronize();
#else
|
| > > |
74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 |
static int winMutexNotheld(sqlite3_mutex *p){
DWORD tid = GetCurrentThreadId();
return winMutexNotheld2(p, tid);
}
#endif
/*
** Try to provide a memory barrier operation, needed for initialization
** and also for the xShmBarrier method of the VFS in cases when SQLite is
** compiled without mutexes (SQLITE_THREADSAFE=0).
*/
void sqlite3MemoryBarrier(void){
#if defined(SQLITE_MEMORY_BARRIER)
SQLITE_MEMORY_BARRIER;
#elif defined(__GNUC__)
__sync_synchronize();
#else
|