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November 2004
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2004.11.05 00:53 "Re: is libtiff thread-safe?", by Phillip Crews
Another issue is that the pointers to the error and warning handlers are shared by all threads, so different threads cannot set up different error handling routines for different uses. For compilers and platforms that support it, this can be remedied easily in tif_win32.c by adding the appropriate modifier to the definitions (e.g., for win32/VC it's __declspec(thread)). Other than that small issue, I have had no problems running libtiff in an intensive multi-threaded environment. - Phillip