Multithreaded Programming Guide


#include <pthread.h>

int pthread_rwlockattr_init(pthread_rwlockattr_t *attr);

pthread_rwlockattr_init(3THR) 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.

Return Values

If successful, pthread_rwlockattr_init() returns zero. Otherwise, an error number is returned to indicate the error.


Insufficient memory exists to initialize the rwlock attributes object.