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.Dd June 12, 2016 .Dt PTHREAD_BARRIERATTR 3 .Os .Sh NAME .Nm pthread_barrierattr_init , .Nm pthread_barrierattr_destroy , .Nm pthread_barrierattr_getpshared , .Nm pthread_barrierattr_setpshared .Nd barrier attribute operations .Sh LIBRARY .Lb libpthread .Sh SYNOPSIS n pthread.h .Ft int .Fn pthread_barrierattr_init "pthread_barrierattr_t *attr" .Ft int .Fn pthread_barrierattr_destroy "pthread_barrierattr_t *attr" .Ft int .Fn pthread_barrierattr_getpshared "const pthread_barrierattr_t * __restrict attr" "int * __restrict pshared" .Ft int .Fn pthread_barrierattr_setpshared "pthread_barrierattr_t * attr" "int pshared" .Sh DESCRIPTION Barrier attributes are used to specify parameters to be used with .Xr pthread_barrier_init 3 . One attribute object can be used in multiple calls to .Fn pthread_barrier_init , with or without modifications between calls.
p The .Fn pthread_barrierattr_init function initializes .Fa attr with the default barrier attributes.
p The .Fn pthread_barrierattr_destroy function destroys .Fa attr .
p The .Fn pthread_barrierattr_getpshared function shall obtain the value of the process-shared attribute from the attributes object referenced by .Fa attr .
p The .Fn pthread_barrierattr_setpshared function shall set the process-shared attribute in an initialized attributes object referenced by .Fa attr . .Sh RETURN VALUES If successful, these functions return 0. Otherwise, an error number is returned to indicate the error. .Sh ERRORS No error codes are defined for .Fn pthread_barrierattr_init .
p The .Fn pthread_barrierattr_destroy function may fail if: l -tag -width Er t Bq Er EINVAL The value specified by .Fa attr is invalid. .El
p The .Fn pthread_barrierattr_getpshared and .Fn pthread_barrierattr_setpshared functions may fail if: l -tag -width Er t Bq Er EINVAL The value specified by .Fa attr is invalid. .El .Sh SEE ALSO .Xr pthread_barrier_init 3 .Sh STANDARDS These functions conform to .St -p1003.1-2001 . .Sh BUGS The .Fn pthread_barrierattr_getpshared and .Fn pthread_barrierattr_setpshared functions are hidden by default since only thread shared attributes are supported.