pthread_barrier_wait(3) - NetBSD Manual Pages

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PTHREAD_BARRIER_WAIT(3) NetBSD Library Functions ManualPTHREAD_BARRIER_WAIT(3)


NAME

     pthread_barrier_wait -- wait for a barrier


LIBRARY

     POSIX Threads Library (libpthread, -lpthread)


SYNOPSIS

     #include <pthread.h>

     int
     pthread_barrier_wait(pthread_barrier_t *barrier);


DESCRIPTION

     The pthread_barrier_wait() function causes the current thread to wait on
     the barrier specified.  Once as many threads as specified by the count
     parameter to the corresponding pthread_barrier_init() call have called
     pthread_barrier_wait(), all threads will wake up, return from their
     respective pthread_barrier_wait() calls and continue execution.


RETURN VALUES

     If successful, pthread_barrier_wait() will return zero for all waiting
     threads except for one.  One thread will receive status
     PTHREAD_BARRIER_SERIAL_THREAD, which is intended to indicate that this
     thread may be used to update shared data.  It is the responsibility of
     this thread to insure the visibility and atomicity of any updates to
     shared data with respect to the other threads participating in the bar-
     rier.  In the case of failure, an error value will be returned.


ERRORS

     pthread_barrier_wait() may fail if:

     [EINVAL]           The value specified by barrier is invalid.


SEE ALSO

     pthread_barrier_destroy(3), pthread_barrier_init(3),
     pthread_barrierattr_destroy(3), pthread_barrierattr_init(3)


STANDARDS

     pthread_barrier_wait() conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

NetBSD 5.1                     January 30, 2003                     NetBSD 5.1