Richard, Im getting some mixed signals here, on the one hand i am being told that it should be ok to use a single transaction and connection across multiple threads (assuming that it is correctly synchronised). But on the other hand i am reading statements like that as part of a list of things which may cause a sqlite misuse error.
"Trying to use the same SQLite database connection from two or more threads at the same time." Anyway, the sqlite_step() problem certainly explains one of the crashes that i saw so that will save me some debugging. Thanks to those who have suggested alternative designs and strategies. I am currently adapting the single thread does all the database work solution. The documentation sources i have been looking at regarding threading are (in addition to various discussions in this mailing list) here; http://www.sqlite.org/cvstrac/wiki?p=MultiThreading http://www.sqlite.org/lang_transaction.html http://www.sqlite.org/lockingv3.html http://www.sqlite.org/faq.html#q8 "With that and subsequent versions, it is safe to move a connection handle across threads as long as the connection is not holding any fcntl() locks. You can safely assume that no locks are being held if no transaction is pending and all statements have been finalized." The above statement regarding transactions was one of the things which led me to believe that it was not possible to have the single transaction, single connection and multiple thread arrangement. Emerson On 12/30/06, [EMAIL PROTECTED] <[EMAIL PROTECTED]> wrote:
Joe Wilson <[EMAIL PROTECTED]> wrote: > --- [EMAIL PROTECTED] wrote: > > SQLite allows you to have multiple queries running at the > > same time in multiple threads, as long as no two threads are > > running sqlite3_step() at the same moment. > > Do you mean "as long as no two threads are running sqlite3_step() > _for the same sqlite3* connection_ at the same moment"? > Yes. -- D. Richard Hipp <[EMAIL PROTECTED]> ----------------------------------------------------------------------------- To unsubscribe, send email to [EMAIL PROTECTED] -----------------------------------------------------------------------------
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