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Václav Haisman 813da84442 POSIX barrier implementation, take 3
The attached patch should address all of the review comments.

Modifed change log:

Newlib:

	* libc/include/sys/features.h (_POSIX_BARRIERS): Define for Cygwin.
	* libc/include/sys/types.h (pthread_barrier_t)
	(pthread_barrierattr_t): Do not define for Cygwin.

Cygwin:

	* common.din (pthread_barrierattr_init)
	(pthread_barrierattr_setpshared, pthread_barrierattr_getpshared)
	(pthread_barrierattr_destroy, pthread_barrier_init)
	(pthread_barrier_destroy, pthread_barrier_wait): Export.
	* include/cygwin/types.h (pthread_barrierattr_t)
	(pthread_barrier_t): Declare.
	* include/pthread.h (PTHREAD_BARRIER_SERIAL_THREAD)
	(pthread_barrierattr_init, pthread_barrierattr_setpshared)
	(pthread_barrierattr_getpshared, pthread_barrierattr_destroy)
	(pthread_barrier_init, pthread_barrier_destroy)
	(pthread_barrier_wait): Declare.
	* thread.h (PTHREAD_BARRIER_MAGIC)
	(PTHREAD_BARRIERATTR_MAGIC): Define.
	(class pthread_barrierattr, class pthread_barrier): Declare.
	* thread.cc (delete_and_clear): New local helper function.
	(class pthread_barrierattr, class pthread_barrier): Implement.
	* miscfuncs.h (likely, unlikely): New macros.

--
VH
2016-02-13 16:03:15 +01:00
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