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#include <synch/synch.h>
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#include <synch/synch.h>
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#include <arch.h>
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#include <arch.h>
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/** Initialize condition variable.
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/** Initialize condition variable.
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 *
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 *
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 * @param cv Condition variable.
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 * @param cv        Condition variable.
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 */
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 */
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void condvar_initialize(condvar_t *cv)
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void condvar_initialize(condvar_t *cv)
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{
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{
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    waitq_initialize(&cv->wq);
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    waitq_initialize(&cv->wq);
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}
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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 to the first waiting thread by waking
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 * to the first waiting thread by waking it up.
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 * it up.
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 *
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 *
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 * @param cv 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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/**
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 * Signal the condition has become true
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/** Signal the condition has become true to all waiting threads by waking
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 * to all waiting threads by waking them up.
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 * them up.
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 *
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 *
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 * @param cv 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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 * @param cv Condition variable.
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 * @param cv        Condition variable.
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 * @param mtx Mutex.
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 * @param mtx       Mutex.
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 * @param usec Timeout value in microseconds.
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 * @param usec      Timeout value in microseconds.
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 * @param flags Select mode of operation.
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 * @param flags     Select mode of operation.
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 *
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 *
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 * For exact description of meaning of possible combinations
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 * For exact description of meaning of possible combinations of usec and flags,
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 * of usec and flags, see comment for waitq_sleep_timeout().
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 * see comment for waitq_sleep_timeout().  Note that when
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 * Note that when SYNCH_FLAGS_NON_BLOCKING is specified here,
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 * SYNCH_FLAGS_NON_BLOCKING is specified here, ESYNCH_WOULD_BLOCK is always
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 * ESYNCH_WOULD_BLOCK is always returned.
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 * returned.
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 *
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 *
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 * @return See comment for waitq_sleep_timeout().
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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, uint32_t usec, int flags)
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int _condvar_wait_timeout(condvar_t *cv, mutex_t *mtx, uint32_t usec, int flags)
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{
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{
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    int rc;
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    int rc;
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    ipl_t ipl;
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    ipl_t ipl;