pthread_mutexattr_init(3C) Standard C Library Functions pthread_mutexattr_init(3C)
NAME
pthread_mutexattr_init, pthread_mutexattr_destroy - initialize or destroy mutex attributes object
SYNOPSIS
cc -mt [ flag... ] file... -lpthread [ library... ]
#include <pthread.h>
int pthread_mutexattr_init(pthread_mutexattr_t *attr);
int pthread_mutexattr_destroy(pthread_mutexattr_t *attr);
DESCRIPTION
The pthread_mutexattr_init() function initializes a mutex attributes object attr with the default value for all of the attributes defined
by the implementation.
The effect of initializing an already initialized mutex attributes object is undefined.
After a mutex attributes object has been used to initialize one or more mutexes, any function affecting the attributes object (including
destruction) does not affect any previously initialized mutexes.
The pthread_mutexattr_destroy() function destroys a mutex attributes object; the object becomes, in effect, uninitialized. An implementa-
tion may cause pthread_mutexattr_destroy() to set the object referenced by attr to an invalid value. A destroyed mutex attributes object
can be re-initialized using pthread_mutexattr_init(); the results of otherwise referencing the object after it has been destroyed are
undefined.
RETURN VALUES
Upon successful completion, pthread_mutexattr_init() and pthread_mutexattr_destroy() return 0. Otherwise, an error number is returned to
indicate the error.
ERRORS
The pthread_mutexattr_init() function may fail if:
ENOMEM Insufficient memory exists to initialize the mutex attributes object.
The pthread_mutexattr_destroy() function may fail if:
EINVAL The value specified by attr is invalid.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
|MT-Level |MT-Safe |
+-----------------------------+-----------------------------+
SEE ALSO
pthread_cond_init(3C), pthread_create(3C), pthread_mutex_init(3C), pthread_mutexattr_settype(3C), attributes(5), standards(5)
SunOS 5.11 23 Mar 2005 pthread_mutexattr_init(3C)