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Commit Graph

6 Commits (39fbcf8f76ff2e7cd8d09307e6aacc70ce8f5fed)

Author	SHA1	Message	Date
Wan-Teh Chang	2170017a1c	avutil: fix data race in av_get_cpu_flags() ... Make the one-time initialization in av_get_cpu_flags() thread-safe. The static variables |flags|, |cpuflags_mask|, and |checked| in libavutil/cpu.c are read and written using normal load and store operations. These are considered as data races. The fix is to use atomic load and store operations. Remove the |checked| variable because the invalid value of -1 for |flags| can be used to indicate the same condition. Rename |flags| to |cpu_flags| and move it to file scope. The fix can be verified by running the libavutil/tests/cpu_init.c test program under ThreadSanitizer: ./configure --toolchain=clang-tsan make libavutil/tests/cpu_init libavutil/tests/cpu_init There should be no warnings from ThreadSanitizer. Co-author: Dmitry Vyukov of Google, who suggested the data race fix. Signed-off-by: Wan-Teh Chang <wtc@google.com>	8 years ago
Anton Khirnov	5cc0057f49	lavu: remove the custom atomic API ... It has been replaced by C11 stdatomic.h and is now unused.	8 years ago
Diego Biurrun	ded4a6543d	xtea-test: Use struct allocation functions from the API	9 years ago
Diego Biurrun	8131bd4c22	blowfish-test: Use struct allocation functions from the API	9 years ago
Diego Biurrun	a86ef80494	blowfish-test: Return different values for different errors	9 years ago
Diego Biurrun	a6a750c7ef	tests: Move all test programs to a subdirectory	9 years ago