Name
NAME
pthread_rwlockattr_destroy, pthread_rwlockattr_init — destroy and initialize the read-write lock attributes object
SYNOPSIS
THR #include <pthread.h> int pthread_rwlockattr_destroy(pthread_rwlockattr_t*attr
); int pthread_rwlockattr_init (pthread_rwlockattr_t*attr
);
DESCRIPTION
The pthread_rwlockattr_destroy() function shall destroy a read-write lock attributes object. A destroyed attr attributes object can be reinitialized using pthread_rwlockattr_init(); the results of otherwise referencing the object after it has been destroyed are undefined. An implementation may cause pthread_rwlockattr_destroy () to set the object referenced by attr to an invalid value.
The pthread_rwlockattr_init() function shall initialize 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 attr 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) shall not affect any previously initialized read-write locks.
RETURN VALUE
If successful, the pthread_rwlockattr_destroy() and pthread_rwlockattr_init() functions shall return zero; otherwise, an error number shall be returned to indicate the error.
ERRORS
The pthread_rwlockattr_destroy () function may fail if:
[EINVAL] | The value specified by attr is invalid. |
The pthread_rwlockattr_init ...
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