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POSIX barrier implementation, take 3

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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
This commit is contained in:
Václav Haisman
2016-02-12 22:25:59 +01:00
committed by Corinna Vinschen
parent ef64aa4940
commit 813da84442
8 changed files with 328 additions and 4 deletions
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12
winsup/cygwin/include/pthread.h
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@ -62,6 +62,7 @@ extern "C"
/* process is the default */
#define PTHREAD_SCOPE_PROCESS 0
#define PTHREAD_SCOPE_SYSTEM 1
#define PTHREAD_BARRIER_SERIAL_THREAD (-1)
/* Register Fork Handlers */
int pthread_atfork (void (*)(void), void (*)(void), void (*)(void));
@ -133,6 +134,17 @@ int pthread_condattr_init (pthread_condattr_t *);
int pthread_condattr_setclock (pthread_condattr_t *, clockid_t);
int pthread_condattr_setpshared (pthread_condattr_t *, int);
/* Barriers */
int pthread_barrierattr_init (pthread_barrierattr_t *);
int pthread_barrierattr_setpshared (pthread_barrierattr_t *, int);
int pthread_barrierattr_getpshared (const pthread_barrierattr_t *, int *);
int pthread_barrierattr_destroy (pthread_barrierattr_t *);
int pthread_barrier_init (pthread_barrier_t *,
const pthread_barrierattr_t *, unsigned);
int pthread_barrier_destroy (pthread_barrier_t *);
int pthread_barrier_wait (pthread_barrier_t *);
/* Threads */
int pthread_create (pthread_t *, const pthread_attr_t *,
void *(*)(void *), void *);
int pthread_detach (pthread_t);