NAME

pthread_mutexattr_getkind_np, pthread_mutexattr_setkind_np —

mutex attribute operations (legacy)

LIBRARY

POSIX Threads Library (libpthread, -lpthread)

SYNOPSIS

#include <pthread_np.h>

int
pthread_mutexattr_getkind_np(pthread_mutexattr_t attr);

int
pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind);

DESCRIPTION

These functions are deprecated and non-portable implementation of the mutex type manipulation.

It is recommended to use the pthread_mutexattr_gettype(3) and pthread_mutexattr_settype(3) functions instead.

RETURN VALUES

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.

ERRORS

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

[EINVAL]: The value specified by attr is invalid.