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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
In 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.
Pp
The
Fn pthread_barrierattr_init
function initializes
Fa attr
with the default barrier attributes.
Pp
The
Fn pthread_barrierattr_destroy
function destroys
Fa attr .
Pp
The
Fn pthread_barrierattr_getpshared
function shall obtain the value of the process-shared attribute
from the attributes object referenced by
Fa attr .
Pp
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 .
Pp
The
Fn pthread_barrierattr_destroy
function may fail if:
Bl -tag -width Er
It Bq Er EINVAL
The value specified by
Fa attr
is invalid.
El
Pp
The
Fn pthread_barrierattr_getpshared
and
Fn pthread_barrierattr_setpshared
functions may fail if:
Bl -tag -width Er
It 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.

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