!)(  (c) 2020 Jonathan Fischoff (c) 2016 Moritz Kiefer (c) 2011-2015 Leon P Smith (c) 2012 Joey AdamsBSD32Moritz Kiefer <moritz.kiefer@purelyfunctional.org>None"#SX_( postgresql-libpq-notify:Options for controlling and instrumenting the behavior of postgresql-libpq-notifyCustom interruptpostgresql-libpq-notifyEvent called if the " is set and returns before the   action returns.postgresql-libpq-notifyEvent called if   action returns before the  action returns.postgresql-libpq-notifyCalled each time ' loops to look for another notificationpostgresql-libpq-notify-Event called before the thread will wait on   action or  returning.postgresql-libpq-notifyDefault configurationpostgresql-libpq-notifyCReturns a single notification. If no notifications are available, " blocks until one arrives. Unlike  ,  takes in an additional ! parameter which provides custom 1 and various event hooks for operational insight.Using a custom ( is necessary if one would like to call  on one thread and NOTIFY- on another thread using the same connection.(To support this behavior one must cause  to return after the call to NOTIFY$ checks it's result from the server.HSee the test file of this package for an example of how to use a custom ._Note that PostgreSQL does not deliver notifications while a connection is inside a transaction. postgresql-libpq-notifyCReturns a single notification. If no notifications are available,   blocks until one arrives.If  0 is called and afterwards on a different thread NOTIFY& is called using the same connection,  * can block even if a notification is sent.&To support this behavior one must use  instead._Note that PostgreSQL does not deliver notifications while a connection is inside a transaction.postgresql-libpq-notifypostgresql-libpq-notify)This is a way to get a connection from a c$. A concrete example would be if c< is 'MVar PQ.Connection' and then this function would be  postgresql-libpq-notifyA type that can used to provide a connection when used with the former argument. Typically a concurrency primitive like 'MVar PQ.Connection' postgresql-libpq-notify)This is a way to get a connection from a c$. A concrete example would be if c< is 'MVar PQ.Connection' and then this function would be  postgresql-libpq-notifyA type that can used to provide a connection when used with the former argument. Typically a concurrency primitive like 'MVar PQ.Connection'     5postgresql-libpq-notify-0.1.0.0-IPa5hV4fpeFfEvlzKEj85 Database.PostgreSQL.LibPQ.NotifyConfig interrupt interruptedthreadWaitReadReturned startLoop beforeWait defaultConfiggetNotificationWithConfiggetNotificationbaseControl.ConcurrentthreadWaitReadSTMControl.Concurrent.MVarwithMVar