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Overview
Comment:Improved memory barrier that should work with MinGW on older versions of Windows.
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SHA1: 47dc24bd1e8f76eb17ba53a883b8984b3e1b2934
User & Date: drh 2015-09-06 10:31:37.987
Context
2015-09-07
02:23
Improved "Parser Statistics" output (the -s option) for the Lemon parser generator. (check-in: 809503e4ef user: drh tags: trunk)
2015-09-06
10:31
Improved memory barrier that should work with MinGW on older versions of Windows. (check-in: 47dc24bd1e user: drh tags: trunk)
02:51
Add a memory barrier to the mutex initialization logic, try to work around an issue reported by WebKit. (check-in: 11a9a786ec user: drh tags: trunk)
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/mutex_unix.c.
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}
#endif

/*
** Try to provide a memory barrier operation, needed for initialization only.
*/
void sqlite3MemoryBarrier(void){


#if defined(__GNUC__)
  __sync_synchronize();
#endif
#ifdef SQLITE_MEMORY_BARRIER
  SQLITE_MEMORY_BARRIER;
#endif
}

/*
** Initialize and deinitialize the mutex subsystem.
*/
static int pthreadMutexInit(void){ return SQLITE_OK; }








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}
#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();



#endif
}

/*
** Initialize and deinitialize the mutex subsystem.
*/
static int pthreadMutexInit(void){ return SQLITE_OK; }
︙︙
Changes to src/mutex_w32.c.
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}
#endif

/*
** Try to provide a memory barrier operation, needed for initialization only.
*/
void sqlite3MemoryBarrier(void){





  MemoryBarrier();

}

/*
** Initialize and deinitialize the mutex subsystem.
*/
static sqlite3_mutex winMutex_staticMutexes[] = {
  SQLITE3_MUTEX_INITIALIZER,








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}
#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
  MemoryBarrier();
#endif
}

/*
** Initialize and deinitialize the mutex subsystem.
*/
static sqlite3_mutex winMutex_staticMutexes[] = {
  SQLITE3_MUTEX_INITIALIZER,
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