_POSIX_READER_WRITER_LOCKS  437 native_client_sdk/src/libraries/third_party/pthreads-win32/pthread.h #undef _POSIX_READER_WRITER_LOCKS
_POSIX_READER_WRITER_LOCKS  438 native_client_sdk/src/libraries/third_party/pthreads-win32/pthread.h #define _POSIX_READER_WRITER_LOCKS 200809L