int
pthread_rwlock_wrlock(
pthread_rwlock_t *lock
)
int
pthread_rwlock_timedwrlock(
pthread_rwlock_t * restrict lock
, const struct timespec * restrict abstime
)
int
pthread_rwlock_trywrlock(
pthread_rwlock_t *lock
)
)
function blocks until a write lock can be acquired against
lock
.
The
pthread_rwlock_timedwrlock()
performs the same action, but will not wait beyond
abstime
to obtain the lock before returning.
The
pthread_rwlock_trywrlock()
function performs the same action as
pthread_rwlock_wrlock(
),
but does not block if the lock cannot be immediately obtained.
The results are undefined if the calling thread already holds the lock at the time the call is made.
),
pthread_rwlock_timedwrlock(
),
and
pthread_rwlock_trywrlock(
)
functions will return zero.
Otherwise an error number will be returned to indicate the error.
)
function shall fail if:
EBUSY
]
The
pthread_rwlock_timedrdlock()
function shall fail if:
ETIMEDOUT
]
abstime
was reached before the lock could be obtained.
The
pthread_rwlock_wrlock(),
pthread_rwlock_timedwrlock(
),
and
pthread_rwlock_trywrlock(
)
functions may fail if:
EDEADLK
]
EINVAL
]
lock
is invalid.
),
pthread_rwlock_timedwrlock(
),
and
pthread_rwlock_trywrlock(
)
conform to
ISO/IEC 9945-1:1996 (``POSIX.1'') .