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Merge pull request #323 from layerhq/enhancement/jitter-in-busy-handler

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Add jitter to SQLite Busy handler
This commit is contained in:
August "Gus" Mueller 2014-12-17 15:21:20 -08:00
commit 3d0bbdd679
1 changed files with 5 additions and 1 deletions
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6
src/fmdb/FMDatabase.m
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@ -231,7 +231,11 @@ static int FMDBDatabaseBusyHandler(void *f, int count) {
NSTimeInterval delta = [NSDate timeIntervalSinceReferenceDate] - (self->_startBusyRetryTime);
if (delta < [self maxBusyRetryTimeInterval]) {
sqlite3_sleep(50); // milliseconds
int requestedSleepInMillseconds = arc4random_uniform(50) + 50;
int actualSleepInMilliseconds = sqlite3_sleep(requestedSleepInMillseconds);
if (actualSleepInMilliseconds != requestedSleepInMillseconds) {
NSLog(@"WARNING: Requested sleep of %i milliseconds, but SQLite returned %i. Maybe SQLite wasn't built with HAVE_USLEEP=1?", requestedSleepInMillseconds, actualSleepInMilliseconds);
}
return 1;
}