Originální popis anglicky:
pthread_rwlockattr_destroy, pthread_rwlockattr_init - destroy and initialize the
read-write lock attributes object
Návod, kniha: POSIX Programmer's Manual
#include <pthread.h>
int pthread_rwlockattr_destroy(pthread_rwlockattr_t
*attr);
int pthread_rwlockattr_init(pthread_rwlockattr_t
*attr);
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.
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.
The
pthread_rwlockattr_destroy() function may fail if:
- EINVAL
- The value specified by attr is invalid.
The
pthread_rwlockattr_init() function shall fail if:
- ENOMEM
- Insufficient memory exists to initialize the read-write
lock attributes object.
These functions shall not return an error code of [EINTR].
The following sections are informative.
None.
None.
None.
None.
pthread_rwlock_destroy() ,
pthread_rwlockattr_getpshared() ,
pthread_rwlockattr_setpshared() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<pthread.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 by the Institute of Electrical and Electronics
Engineers, Inc and The Open Group. In the event of any discrepancy between
this version and the original IEEE and The Open Group Standard, the original
IEEE and The Open Group Standard is the referee document. The original
Standard can be obtained online at http://www.opengroup.org/unix/online.html
.
