2415 typedef struct sqlite3_vfs sqlite3_vfs;  typedef
2417 struct sqlite3_vfs {  struct
2421   sqlite3_vfs *pNext;      /* Next registered VFS */  argument
2424   int (*xOpen)(sqlite3_vfs*, const char *zName, sqlite3_file*,  argument
2426   int (*xDelete)(sqlite3_vfs*, const char *zName, int syncDir);  argument
2427   int (*xAccess)(sqlite3_vfs*, const char *zName, int flags, int *pResOut);  argument
2428   int (*xFullPathname)(sqlite3_vfs*, const char *zName, int nOut, char *zOut);  argument
2429   void *(*xDlOpen)(sqlite3_vfs*, const char *zFilename);  argument
2430   void (*xDlError)(sqlite3_vfs*, int nByte, char *zErrMsg);  argument
2431   void (*(*xDlSym)(sqlite3_vfs*,void*, const char *zSymbol))(void);  argument
2432   void (*xDlClose)(sqlite3_vfs*, void*);  argument
2433   int (*xRandomness)(sqlite3_vfs*, int nByte, char *zOut);  argument
2434   int (*xSleep)(sqlite3_vfs*, int microseconds);  argument
2435   int (*xCurrentTime)(sqlite3_vfs*, double*);  argument
2436   int (*xGetLastError)(sqlite3_vfs*, int, char *);  argument
2441   int (*xCurrentTimeInt64)(sqlite3_vfs*, sqlite3_int64*);  argument
2446   int (*xSetSystemCall)(sqlite3_vfs*, const char *zName, sqlite3_syscall_ptr);  argument
2447   sqlite3_syscall_ptr (*xGetSystemCall)(sqlite3_vfs*, const char *zName);  argument
2448   const char *(*xNextSystemCall)(sqlite3_vfs*, const char *zName);  argument