pthread_rwlockattr_init(3C) Standard C Library Functions pthread_rwlockattr_init(3C)
NAME
pthread_rwlockattr_init, pthread_rwlockattr_destroy - initialize or destroy read-write lock attributes object
SYNOPSIS
cc -mt [ flag... ] file... -lpthread [ library... ]
#include <pthread.h>
int pthread_rwlockattr_init(pthread_rwlockattr_t *attr);
int pthread_rwlockattr_destroy(pthread_rwlockattr_t *attr);
DESCRIPTION
The pthread_rwlockattr_init() function initializes a read-write lock attributes object attr with the default value for all of the
attributes defined by the implementation.
Results are undefined if pthread_rwlockattr_init() is called specifying an already initialized read-write lock attributes object.
After a read-write lock attributes object has been used to initialize one or more read-write locks, any function affecting the attributes
object (including destruction) does not affect any previously initialized read-write locks.
The pthread_rwlockattr_destroy() function destroys a read-write lock attributes object. The effect of subsequent use of the object is unde-
fined until the object is re-initialized by another call to pthread_rwlockattr_init(). An implementation can cause pthread_rwlock-
attr_destroy() to set the object referenced by attr to an invalid value.
RETURN VALUES
If successful, the pthread_rwlockattr_init() and pthread_rwlockattr_destroy() functions return 0. Otherwise, an error number is returned to
indicate the error.
ERRORS
The pthread_rwlockattr_init() function will fail if:
ENOMEM Insufficient memory exists to initialize the read-write lock attributes object.
The pthread_rwlockattr_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_rwlock_init(3C), pthread_rwlock_rdlock(3C), pthread_rwlock_unlock(3C), pthread_rwlock_wrlock(3C), pthread_rwlockattr_getp-
shared(3C), attributes(5), standards(5)
SunOS 5.11 23 Mar 2005 pthread_rwlockattr_init(3C)