SQLite C 接口
互斥量类型
#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 */
sqlite3_mutex_alloc()接口采用单个参数，该参数是这些整数常量之一 。
一组静态互斥量可能会从一个 SQLite 版本到下一个版本发生变化。覆盖内置互斥锁逻辑的应用程序必须准备好容纳额外的静态互斥锁。