PTHREAD_MUTEXATTR_INIT(3C)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 implementation
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_mutex‐
attr_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 ALSOpthread_cond_init(3C), pthread_create(3C), pthread_mutex_init(3C),
pthread_mutexattr_settype(3C), attributes(5), standards(5)
Mar 23, 2005 PTHREAD_MUTEXATTR_INIT(3C)
