fbclient executes callback function twice on two different threads
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Key: CORE-4795
URL: http://tracker.firebirdsql.org/browse/CORE-4795
Project: Firebird Core
Issue Type: Bug
Components: API / Client Library
Affects Versions: 3.0 Beta 2
Environment: Windows 8.1 64 bit, Firebird 3.0.0.31839_x64 fbclient.dll
against Firebird 3.0.0.31839_x64 server
Reporter: Mark Rotteveel
The firebird 3.0.0.31839 fbclient invokes the callback function twice for each
triggered event and for cancellation. For example the Jaybird
TestFBEventManager.testWaitForEventWithOccurrence() shows the following (when
code is added to show the thread identity):
Queue invoked from Thread: Thread[Thread-2,5,main]
Callback invoked from Thread: Thread[Thread-3,5,main]
Queue invoked from Thread: Thread[Thread-3,5,main]
Callback invoked from Thread: Thread[Thread-4,5,main]
Callback invoked from Thread: Thread[Thread-5,5,main]
Queue invoked from Thread: Thread[Thread-5,5,main]
Cancel invoked from Thread: Thread[Thread-2,5,main]
Callback invoked from Thread: Thread[Thread-6,5,main]
Callback invoked from Thread: Thread[Thread-2,5,main]
As you can see the initial queue gets one callback (as expected), but the
second queue receives two callbacks, and the cancel also receives two callbacks.
The same code with the 2.5.4 fbclient shows:
Queue invoked from Thread: Thread[Thread-2,5,main]
Callback invoked from Thread: Thread[Thread-3,5,main]
Queue invoked from Thread: Thread[Thread-3,5,main]
Callback invoked from Thread: Thread[Thread-4,5,main]
Queue invoked from Thread: Thread[Thread-4,5,main]
Cancel invoked from Thread: Thread[Thread-2,5,main]
Callback invoked from Thread: Thread[Thread-2,5,main]
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