Mutex Types
\ #define SQLITE_MUTEX_FAST 0\ #define SQLITE_MUTEX_RECURSIVE 1\ #define SQLITE_MUTEX_STATIC_MAIN 2\ #define SQLITE_MUTEX_STATIC_MEM 3 /* sqlite3_malloc() */\ #define SQLITE_MUTEX_STATIC_MEM2 4 /* NOT USED */\ #define SQLITE_MUTEX_STATIC_OPEN 4 /* sqlite3BtreeOpen() */\ #define SQLITE_MUTEX_STATIC_PRNG 5 /* sqlite3_randomness() */\ #define SQLITE_MUTEX_STATIC_LRU 6 /* lru page list */\ #define SQLITE_MUTEX_STATIC_LRU2 7 /* NOT USED */\ #define SQLITE_MUTEX_STATIC_PMEM 7 /* sqlite3PageMalloc() */\ #define SQLITE_MUTEX_STATIC_APP1 8 /* For use by application */\ #define SQLITE_MUTEX_STATIC_APP2 9 /* For use by application */\ #define SQLITE_MUTEX_STATIC_APP3 10 /* For use by application */\ #define SQLITE_MUTEX_STATIC_VFS1 11 /* For use by built-in VFS */\ #define SQLITE_MUTEX_STATIC_VFS2 12 /* For use by extension VFS */\ #define SQLITE_MUTEX_STATIC_VFS3 13 /* For use by application VFS */\
The sqlite3_mutex_alloc() interface takes a single argument which is one of these integer constants.
The set of static mutexes may change from one SQLite release to the next. Applications that override the built-in mutex logic must be prepared to accommodate additional static mutexes.