pthread_mutexattr_getkind_np3
Mutex attribute operations (legacy)
Usage
#include <pthread_np.h>
int
pthread_mutexattr_getkind_np(pthread_mutexattr_t attr);
int
pthread_mutexattr_setkind_np(pthread_mutexattr_t *attr, int kind);
Library
POSIX Threads Library (libpthread, -lpthread)
Overview
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.
Releases
59 releases since FreeBSD 4.8-RELEASE; the text changed 36 times.