pthread_barrier_init(3) - NetBSD Manual Pages

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PTHREAD_BARRIER_INIT(3) NetBSD Library Functions ManualPTHREAD_BARRIER_INIT(3)


NAME

     pthread_barrier_init -- create a barrier


LIBRARY

     POSIX Threads Library (libpthread, -lpthread)


SYNOPSIS

     #include <pthread.h>

     int
     pthread_barrier_init(pthread_barrier_t * restrict barrier,
         const pthread_barrierattr_t * restrict attr, unsigned int count);


DESCRIPTION

     The pthread_barrier_init() function creates a new barrier, with
     attributes specified with attr and count.  The count parameter indicates
     the number of threads which will participate in the barrier.  If attr is
     NULL the default attributes are used.  Barriers are most commonly used in
     the decomposition of parallel loops.


RETURN VALUES

     If successful, pthread_barrier_init() will return zero and put the new
     barrier id into barrier, otherwise an error number will be returned to
     indicate the error.


ERRORS

     pthread_barrier_init() shall fail if:

     [EAGAIN]           The system lacks the resources to initialize another
                        barrier.

     [EINVAL]           The value specified by count is zero.

     [ENOMEM]           Insufficient memory exists to initialize the barrier.

     pthread_barrier_init() may fail if:

     [EBUSY]            The barrier structure has been initialized already.

     [EINVAL]           The value specified by attr is invalid.


SEE ALSO

     pthread_barrier_destroy(3), pthread_barrier_wait(3),
     pthread_barrierattr_destroy(3), pthread_barrierattr_init(3)


STANDARDS

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

NetBSD 5.0.1                   January 30, 2003                   NetBSD 5.0.1