Manual Pages  — PTHREAD_MUTEXATTR_GETKIND_NP

pthread_mutexattr_getkind_np, pthread_mutexattr_setkind_np – mutex attribute operations (legacy)

LIBRARY SYNOPSIS DESCRIPTION RETURN VALUES ERRORS SEE ALSO

POSIX Threads Library (libpthread, -lpthread)

#include <pthread_np.h>

int
pthread_mutexattr_getkind_np(pthread_mutexattr_t attr);

int
pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind);

The pthread_mutexattr_getkind_np() function returns a positive value representing the "kind" of the mutex attribute attr if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

The pthread_mutexattr_setkind_np function returns the value 0 if successful; otherwise the value -1 is returned and the global variable errno is set to indicate the error.

The pthread_mutexattr_getkind_np() and pthread_mutexattr_setkind_np() functions will fail if:

[EINVAL]
	The value specified by attr is invalid.