Recently, I am working on developing a Calc extension for showing dynamic streaming data, such as Bloomberg and Reuters real time data. The extension is written in C++ for Windows OS and contains add-in functions for retrieving dynamic financial data. Based on the OpenOffice/LibreOffice developer's guide, the function returns XVolatileResult derived data type.
There are two threads. The main thread deals with spreadsheet, such as calling functions. The second thread gets the streaming messages, processes them and notify spreadsheet (the main thread) data changes via Reference<XResultListener> -> modified(EventResult) function within XVolatileResult derived object. The deadlock scenario is that the spreadsheet called the functions many times and was showing dynamical financial data. Then I closed the spreadsheet window. The window quit immediately, but the soffice.bin and soffice.exe were still in task manager. I had to kill these processes manually. From the log file, I saw that main thread hung at destruction process, trying to close the second thread, and the second thread hang at Reference<XResultLisenter> -> modified(), trying to update the spreadsheet. After doing some research, I suspect that the deadlock is because of SolarMutex. The main thread starts termination process, acquires SolarMutex, and tries to close the second thread. But the second thread can not complete if the Listener->modified() function is waiting for SolarMutex too. This is a multi-threads issue. I saw a similar bug report at http://nabble.documentfoundation.org/Base-hangs-when-trying-to-close-it-td3798832.html A patch tried to solve the above bug: https://bugs.freedesktop.org/attachment.cgi?id=58176. However, this patch is reverted from release version LibreOffice 3.6.0 : http://wiki.documentfoundation.org/Releases/3.6.0/RC2 (do#47021 revert "attempt fix of hang on base close, due to solarmutex deadlock on join" [Michael Stahl]) . I am wondering if there is a signal which I can detect when the termination process starts. If yes, then I can prepare for the termination in the extension. Or if I can release the Solarmutex in my code to let thread 2 complete the modified() function? Any other suggestions? Thank you for your kind help. -- View this message in context: http://nabble.documentfoundation.org/Solarmutex-Deadlock-when-Closing-Calc-which-contains-functions-with-XVolatileResult-return-values-tp3998056.html Sent from the Dev mailing list archive at Nabble.com. _______________________________________________ LibreOffice mailing list LibreOffice@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/libreoffice
