Multithreaded Programming Guide


pthread_mutexattr_getpshared(3T) returns the scope of the mutex variable defined by pthread_mutexattr_setpshared().

int	pthread_mutexattr_getpshared(pthread_mutexattr_t *mattr,
    int *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. It is either PTHREAD_PROCESS_SHARED or PTHREAD_PROCESS_PRIVATE.

Return Values

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


The value specified by mattr is invalid.