PTHREAD_MUTEXATTR_INIT(3C) Standard C Library Functions
pthread_mutexattr_init, pthread_mutexattr_destroy - initialize or
destroy mutex attributes object
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);
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.
Upon successful completion, pthread_mutexattr_init() and
pthread_mutexattr_destroy() return 0. Otherwise, an error number is
returned to indicate the error.
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.
See attributes(7) for descriptions of the following attributes:
+--------------------+-----------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-----------------+
|Interface Stability | Standard |
+--------------------+-----------------+
|MT-Level | MT-Safe |
+--------------------+-----------------+
pthread_cond_init(3C), pthread_create(3C), pthread_mutex_init(3C),
pthread_mutexattr_settype(3C), attributes(7), standards(7)
March 23, 2005 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_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(7) 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(7), standards(7)
March 23, 2005 PTHREAD_MUTEXATTR_INIT(3C)