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/** Signal the condition has become true
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/** Signal the condition has become true
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 *
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 *
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 * Signal the condition has become true
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 * Signal the condition has become true
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 * to the first waiting thread by waking it up.
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 * to the first waiting thread by waking it up.
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 *
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 *
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 * @param Condition variable.
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 * @param cv Condition variable.
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 */
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 */
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void condvar_signal(condvar_t *cv)
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void condvar_signal(condvar_t *cv)
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{
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{
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    waitq_wakeup(&cv->wq, WAKEUP_FIRST);
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    waitq_wakeup(&cv->wq, WAKEUP_FIRST);
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}
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}
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/** Signal the condition has become true
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/** Signal the condition has become true
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 *
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 *
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 * Signal the condition has become true
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 * Signal the condition has become true
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 * to all waiting threads by waking them up.
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 * to all waiting threads by waking them up.
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 *
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 *
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 * @param Condition variable.
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 * @param cv Condition variable.
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 */
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 */
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void condvar_broadcast(condvar_t *cv)
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void condvar_broadcast(condvar_t *cv)
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{
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{
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    waitq_wakeup(&cv->wq, WAKEUP_ALL);
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    waitq_wakeup(&cv->wq, WAKEUP_ALL);
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}
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}
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/** Wait for the condition becoming true
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/** Wait for the condition becoming true
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 *
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 *
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 * Wait for the condition becoming true.
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 * Wait for the condition becoming true.
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 *
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 *
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 * @param Condition variable.
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 * @param cv Condition variable.
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 * @param mtx Mutex.
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 * @param usec Timeout value in microseconds.
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 * @param trywait Blocking versus non-blocking operation mode switch.
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 *
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 * For exact description of possible combinations of
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 * 'usec' and 'trywait', see comment for waitq_sleep_timeout().
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 *
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 * @return See comment for waitq_sleep_timeout().
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 */
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 */
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int _condvar_wait_timeout(condvar_t *cv, mutex_t *mtx, __u32 usec, int trywait)
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int _condvar_wait_timeout(condvar_t *cv, mutex_t *mtx, __u32 usec, int trywait)
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{
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{
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    int rc;
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    int rc;
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