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## SQLite C Interface

## Set A Busy Timeout

>     int sqlite3_busy_timeout(sqlite3*, int ms);

This routine sets a busy handler that sleeps for a specified amount of time when a table is locked. The handler will sleep multiple times until at least "ms" milliseconds of sleeping have accumulated. After "ms" milliseconds of sleeping, the handler returns 0 which causes sqlite3_step() to return SQLITE_BUSY or SQLITE_IOERR_BLOCKED.

Calling this routine with an argument less than or equal to zero turns off all busy handlers.

There can only be a single busy handler for a particular database connection any any given moment. If another busy handler was defined (using sqlite3_busy_handler()) prior to calling this routine, that other busy handler is cleared.

### Invariants:

H12341 | The sqlite3_busy_timeout() function shall override any prior sqlite3_busy_timeout() or sqlite3_busy_handler() setting on the same database connection.
H12343 | If the 2nd parameter to sqlite3_busy_timeout() is less than or equal to zero, then the busy handler shall be cleared so that all subsequent locking events immediately return SQLITE_BUSY.
H12344 | If the 2nd parameter to sqlite3_busy_timeout() is a positive number N, then a busy handler shall be set that repeatedly calls the xSleep() method in the VFS interface until either the lock clears or until the cumulative sleep time reported back by xSleep() exceeds N milliseconds.

See also lists of Objects, Constants, and Functions.

This page last modified 2008/08/11 17:57:43 UTC