cnd_init()
QNX SDP8.0C Library ReferenceAPIDeveloper
Initialize a condition variable
Synopsis:
#include <threads.h>
int cnd_init(cnd_t *cond );
Arguments:
- cond
- A pointer to the cnd_t object that you want to initialize.
Note:It's always safe, and typically faster, to assure that cond is 32-bit aligned.
Library:
libc
Use the -l c option to qcc to link against this library. This library is usually included automatically.
Description:
The cnd_init() function initializes the condition variable cond.
CAUTION:
You should allocate synchronization objects only in normal memory mappings.
On certain processors, atomic operations such as calls to
mtx_lock()
will cause a fault if the control structure is allocated in uncached memory.
Returns:
- thrd_nomem
- All kernel synchronization objects are in use, or there wasn't enough memory to initialize the condvar.
- thrd_success
- Success.
- thrd_error
- An error occurred.
Classification:
| Safety: | |
|---|---|
| Cancellation point | No |
| Signal handler | Yes |
| Thread | Yes |
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