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Initialize a read-write lock
#include <audio_driver.h>
int ado_rwlock_init( pthread_rwlock_t *rwl);
- rwl
- A pointer to the pthread_rwlock_t structure for the
read-write lock.
This macro initializes the given read-write lock.
The ado_rwlock_init() macro is defined as
pthread_rwlock_init(),
or ado_rwlock_init_debug() if ADO_RWLOCK_DEBUG and
ADO_DEBUG are defined.
The debug version uses
ado_debug()
to display a message to help you locate a locking problem in the driver.
For more information, see
“Debugging an audio driver”
in the Organization of a Driver chapter.
Same as
pthread_rwlock_init():
- EOK
- Success.
- EAGAIN
- Insufficient system resources to initialize the read-write lock.
- EBUSY
- The read-write lock rwl has been initialized or unsuccessfully destroyed.
- EFAULT
- A fault occurred when the kernel tried to access rwl or attr.
- EINVAL
- Invalid read-write lock attribute object attr.
QNX Neutrino
Safety: | |
Cancellation point |
No |
Interrupt handler |
No |
Signal handler |
No |
Thread |
Yes |
ado_rwlock_destroy(),
ado_rwlock_rdlock(),
ado_rwlock_unlock(),
ado_rwlock_wrlock()
pthread_rwlock_init()
in the QNX Library Reference
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