pthread_mutexattr_getpshared(3C) returns the scope of the mutex variable defined by pthread_mutexattr_setpshared().
int pthread_mutexattr_getpshared(pthread_mutexattr_t *restrict mattr, int *restrict pshared);
#include <pthread.h> pthread_mutexattr_t mattr; int pshared, ret; /* get pshared of mutex */ ret = pthread_mutexattr_getpshared(&mattr, &pshared);
Get the current value of pshared for the attribute object mattr. The value is either PTHREAD_PROCESS_SHARED or PTHREAD_PROCESS_PRIVATE.
pthread_mutexattr_getpshared() 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:The value specified by mattr is invalid.