pthread_barrierattr_getpshared(3)

NAME

pthread_barrierattr_getpshared, pthread_barrierattr_setpshared — get or set the process-shared attribute of the barrier attribute's object

SYNOPSIS

/* -lpthread */
#include <pthread.h>

int
pthread_barrierattr_getpshared(pthread_barrierattr_t *attr, int *pshared);

int
pthread_barrierattr_setpshared(pthread_barrierattr_t *attr, int pshared);

DESCRIPTION

The pthread_barrierattr_getpshared() function writes in pshared the current process-shared attribute value.

The pthread_barrierattr_setpshared() function sets the process-shared attribute as indicated in pshared.

RETURN VALUES

If successful, pthread_barrierattr_getpshared() and pthread_barrierattr_setpshared() will return zero, otherwise an error number will be returned to indicate the error.

ERRORS

pthread_barrierattr_getpshared() will fail if:

[EINVAL]

The value specified by attr is invalid.

pthread_barrierattr_setpshared() will fail if:

[EINVAL]

The value specified by attr is invalid.

[ENOTSUP]

The value specified by pshared is not PTHREAD_PROCESS_PRIVATE.

SEE ALSO

pthread_barrier_init(3), pthread_barrier_wait(3), pthread_barrierattr_init(3)

STANDARDS

pthread_barrierattr_getpshared() and pthread_barrierattr_setpshared() conform to IEEE Std 1003.1-2008 (“POSIX.1”).

BUGS

Currently only private barriers are supported and the pshared attribute is always set that way. Any attempts to change that value will trigger ENOTSUP.