iofunc_attr_unlock()
QNX SDP8.0C Library ReferenceAPIDeveloper
Unlock the attribute structure
Synopsis:
#include <sys/iofunc.h>
int iofunc_attr_unlock( iofunc_attr_t *attr );
Arguments:
- attr
- A pointer to the iofunc_attr_t structure that you want to unlock.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The iofunc_attr_unlock() function unlocks the attribute structure attr, allowing other threads in the resource manager to change information.
Use this function in conjunction with iofunc_attr_lock() or iofunc_attr_trylock(); call iofunc_attr_unlock() after you've made modifications to the attribute structure. You must unlock the structure as many times as you locked it.
Returns:
- EOK
- Success.
- Anything else
- An error occurred. Refer to pthread_mutex_unlock() for a list of possible error returns.
Classification:
| Safety: | |
|---|---|
| Cancellation point | No |
| Signal handler | Yes |
| Thread | Yes |
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