Adriaan van Os via fpc-pascal <fpc-pascal@lists.freepascal.org> schrieb am Mi., 9. Okt. 2024, 16:44:
> I have a program on MacOS that calls CoreAudio which calls the application > back in a so-called > AURendererCallback in a separate (com.apple.audio.IOThread.client) thread. > This is a pthread > created by the system software, not by the FreePascal RTL. > > In that thread, a FreePascal try except block doesn't catch an exception. > A globally installed > TExceptProc does. if I look in the RTL code, it looks like a thread > created with BeginThread does > some extra things, like calling SysAllocateThreadVars. A comment notes > that exception handling > depends on it. > > So, it seems plausible that SysAllocateThreadVars (or the > AllocateThreadVars method of the current > TThreadManager) must be called once for pthreads created by the system > software ? How ? Obviously > I couldn't use a threadvar that tells me whether AllocateThreadVars has > been called already ? > You already wrote that you might have found a different cause, but nevertheless to clarify: the RTL initialization for the thread (which includes AllocateThreadVars) should already be done transparently by the RTL through hooks provided by pthread. Regards, Sven >
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