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Overview
| Comment: | Fix comments. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | mutexInitCmpSwap |
| Files: | files | file ages | folders |
| SHA1: |
de3fa51e931d34f341fc3432bfdf9739 |
| User & Date: | mistachkin 2015-09-12 04:22:01 |
Context
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2015-09-12
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| 16:59 | Merge updates from trunk. check-in: 48597789 user: mistachkin tags: mutexInitCmpSwap | |
| 04:22 | Fix comments. check-in: de3fa51e user: mistachkin tags: mutexInitCmpSwap | |
| 04:19 | Specifying an invalid mutex implementation (via SQLITE_CONFIG_MUTEX) should cause the default one to be used instead. check-in: 1a97bc81 user: mistachkin tags: mutexInitCmpSwap | |
Changes
Changes to src/mutex.c.
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*/ static SQLITE_WSD int mutexIsInit = 0; #endif /* SQLITE_DEBUG && !defined(SQLITE_MUTEX_OMIT) */ #ifndef SQLITE_MUTEX_OMIT /* ** This structure is for use by sqlite3MutexInit() only. It represents an ** invalid mutex implementation (i.e. one where all the function pointers ** are null). */ static const sqlite3_mutex_methods mutexNullMethods = { 0, /* xMutexInit */ 0, /* xMutexEnd */ 0, /* xMutexAlloc */ ................................................................................ /* ** Initialize the mutex system. */ int sqlite3MutexInit(void){ int rc; if( sqlite3CompareAndSwap((void * volatile *)&sqlite3GlobalConfig.pMutex, 0, &sqlite3GlobalConfig.mutex)==0 || mutexIsInvalid() ){ /* If the xMutexAlloc method has not been set, then the user did not ** install a mutex implementation via sqlite3_config() prior to ** sqlite3_initialize() being called. This block copies pointers to ** the default implementation into the sqlite3GlobalConfig structure. */ sqlite3_mutex_methods const *pFrom; if( sqlite3GlobalConfig.bCoreMutex ){ pFrom = sqlite3DefaultMutex(); }else{ pFrom = sqlite3NoopMutex(); |
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*/ static SQLITE_WSD int mutexIsInit = 0; #endif /* SQLITE_DEBUG && !defined(SQLITE_MUTEX_OMIT) */ #ifndef SQLITE_MUTEX_OMIT /* ** This structure is for use by mutexIsInvalid() only. It represents an ** invalid mutex implementation (i.e. one where all the function pointers ** are null). */ static const sqlite3_mutex_methods mutexNullMethods = { 0, /* xMutexInit */ 0, /* xMutexEnd */ 0, /* xMutexAlloc */ ................................................................................ /* ** Initialize the mutex system. */ int sqlite3MutexInit(void){ int rc; if( sqlite3CompareAndSwap((void * volatile *)&sqlite3GlobalConfig.pMutex, 0, &sqlite3GlobalConfig.mutex)==0 || mutexIsInvalid() ){ /* If the mutex implementation pointer has not been set, then the user ** did not install a mutex implementation via sqlite3_config() prior to ** sqlite3_initialize() being called. This block copies the pointers ** for the default implementation into the sqlite3GlobalConfig structure. */ sqlite3_mutex_methods const *pFrom; if( sqlite3GlobalConfig.bCoreMutex ){ pFrom = sqlite3DefaultMutex(); }else{ pFrom = sqlite3NoopMutex(); |