Setting a Barrier Process-Shared Attribute

The pthread_barrierattr_setpshared() function sets the process-shared attribute in an initialized attributes object referenced by attr. The process-shared attribute can have the following values:

PTHREAD_PROCESS_PRIVATE

The barrier can only be operated upon by threads created within the same process as the thread that initialized the barrier. This is the default value of the process-shared attribute.

PTHREAD_PROCESS_SHARED

The barrier can be operated upon by any thread that has access to the memory where the barrier is allocated.

pthread_barrierattr_setpshared() Syntax

int pthread_barrierattr_setpshared(pthread_barrierattr_t *attr, int pshared);

pthread_barrierattr_setpshared() Return Values

pthread_barrierattr_setpshared() returns zero after completing successfully. Any other return value indicates that an error occurred. If the following condition occurs, the function fails and returns the corresponding value.

EINVAL

Description:

Indicates that the value of attr was not valid, or the new value specified for the pshared is not valid.