WebSVN – HelenOS – Diff – /trunk/kernel/generic/src/synch/condvar.c



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

Subversion Repositories HelenOS

(root)/trunk/kernel/generic/src/synch/condvar.c @ 2071 – Rev 2089 → 3186

Rev 2089		Rev 3186
Line 41...		Line 41...
41	#include <synch/synch.h>	41	#include <synch/synch.h>
42	#include <arch.h>	42	#include <arch.h>
43		43
44	/** Initialize condition variable.	44	/** Initialize condition variable.
45	*	45	*
46	* @param cv Condition variable.	46	* @param cv Condition variable.
47	*/	47	*/
48	void condvar_initialize(condvar_t *cv)	48	void condvar_initialize(condvar_t *cv)
49	{	49	{
50	waitq_initialize(&cv->wq);	50	waitq_initialize(&cv->wq);
51	}	51	}
52		52
53	/**	-
54	* Signal the condition has become true	53	/** Signal the condition has become true to the first waiting thread by waking
55	* to the first waiting thread by waking it up.	54	* it up.
56	*	55	*
57	* @param cv Condition variable.	56	* @param cv Condition variable.
58	*/	57	*/
59	void condvar_signal(condvar_t *cv)	58	void condvar_signal(condvar_t *cv)
60	{	59	{
61	waitq_wakeup(&cv->wq, WAKEUP_FIRST);	60	waitq_wakeup(&cv->wq, WAKEUP_FIRST);
62	}	61	}
63		62
64	/**	-
65	* Signal the condition has become true	63	/** Signal the condition has become true to all waiting threads by waking
66	* to all waiting threads by waking them up.	64	* them up.
67	*	65	*
68	* @param cv Condition variable.	66	* @param cv Condition variable.
69	*/	67	*/
70	void condvar_broadcast(condvar_t *cv)	68	void condvar_broadcast(condvar_t *cv)
71	{	69	{
72	waitq_wakeup(&cv->wq, WAKEUP_ALL);	70	waitq_wakeup(&cv->wq, WAKEUP_ALL);
73	}	71	}
74		72
75	/** Wait for the condition becoming true.	73	/** Wait for the condition becoming true.
76	*	74	*
77	* @param cv Condition variable.	75	* @param cv Condition variable.
78	* @param mtx Mutex.	76	* @param mtx Mutex.
79	* @param usec Timeout value in microseconds.	77	* @param usec Timeout value in microseconds.
80	* @param flags Select mode of operation.	78	* @param flags Select mode of operation.
81	*	79	*
82	* For exact description of meaning of possible combinations	80	* For exact description of meaning of possible combinations of usec and flags,
83	* of usec and flags, see comment for waitq_sleep_timeout().	81	* see comment for waitq_sleep_timeout(). Note that when
84	* Note that when SYNCH_FLAGS_NON_BLOCKING is specified here,	82	* SYNCH_FLAGS_NON_BLOCKING is specified here, ESYNCH_WOULD_BLOCK is always
85	* ESYNCH_WOULD_BLOCK is always returned.	83	* returned.
86	*	84	*
87	* @return See comment for waitq_sleep_timeout().	85	* @return See comment for waitq_sleep_timeout().
88	*/	86	*/
89	int _condvar_wait_timeout(condvar_t cv, mutex_t mtx, uint32_t usec, int flags)	87	int _condvar_wait_timeout(condvar_t cv, mutex_t mtx, uint32_t usec, int flags)
90	{	88	{
91	int rc;	89	int rc;
92	ipl_t ipl;	90	ipl_t ipl;