PTHREAD_RWLOCK_INIT(3) | Library Functions Manual | PTHREAD_RWLOCK_INIT(3) |
pthread_rwlock_init
—
initialize a read/write lock
#include
<pthread.h>
int
pthread_rwlock_init
(pthread_rwlock_t
*lock, const
pthread_rwlockattr_t *attr);
The
pthread_rwlock_init
()
function is used to initialize a read/write lock, with attributes specified
by attr. If attr is NULL, the
default read/write lock attributes are used.
The results of calling
pthread_rwlock_init
()
with an already initialized lock are undefined.
If successful, the pthread_rwlock_init
()
function will return zero. Otherwise an error number will be returned to
indicate the error.
The pthread_rwlock_init
() function will
fail if:
EAGAIN
]ENOMEM
]EPERM
]The pthread_rwlock_init
() function may
fail if:
pthread_rwlock_destroy(3), pthread_rwlockattr_init(3), pthread_rwlockattr_setpshared(3)
The pthread_rwlock_init
() function is
expected to conform to Version 2 of the Single UNIX
Specification (“SUSv2”).
The pthread_rwlock_init
() function first
appeared in FreeBSD 3.0.
The PTHREAD_PROCESS_SHARED attribute is not supported.
August 4, 1998 | macOS 14.6 |