kernel/time/sleep_timeout.c

3  *  Kernel internal schedule timeout and sleeping functions
25 	struct process_timer *timeout = timer_container_of(timeout, t, timer);
27 	wake_up_process(timeout->task);
31  * schedule_timeout - sleep until timeout
32  * @timeout: timeout value in jiffies
34  * Make the current task sleep until @timeout jiffies have elapsed.
42  * %TASK_UNINTERRUPTIBLE - at least @timeout jiffies are guaranteed to
53  * Specifying a @timeout value of %MAX_SCHEDULE_TIMEOUT will schedule
54  * the CPU away without a bound on the timeout. In this case the return
61 signed long __sched schedule_timeout(signed long timeout)
66 	switch (timeout) {
85 		if (timeout < 0) {
86 			pr_err("%s: wrong timeout value %lx\n", __func__, timeout);
93 	expire = timeout + jiffies;
105 	timeout = expire - jiffies;
108 	return timeout < 0 ? 0 : timeout;
118  * schedule_timeout_interruptible - sleep until timeout (interruptible)
119  * @timeout: timeout value in jiffies
123  * Task state is set to TASK_INTERRUPTIBLE before starting the timeout.
125 signed long __sched schedule_timeout_interruptible(signed long timeout)
128 	return schedule_timeout(timeout);
133  * schedule_timeout_killable - sleep until timeout (killable)
134  * @timeout: timeout value in jiffies
138  * Task state is set to TASK_KILLABLE before starting the timeout.
140 signed long __sched schedule_timeout_killable(signed long timeout)
143 	return schedule_timeout(timeout);
148  * schedule_timeout_uninterruptible - sleep until timeout (uninterruptible)
149  * @timeout: timeout value in jiffies
153  * Task state is set to TASK_UNINTERRUPTIBLE before starting the timeout.
155 signed long __sched schedule_timeout_uninterruptible(signed long timeout)
158 	return schedule_timeout(timeout);
163  * schedule_timeout_idle - sleep until timeout (idle)
164  * @timeout: timeout value in jiffies
168  * Task state is set to TASK_IDLE before starting the timeout. It is similar to
172 signed long __sched schedule_timeout_idle(signed long timeout)
175 	return schedule_timeout(timeout);
180  * schedule_hrtimeout_range_clock - sleep until timeout
181  * @expires:	timeout value (ktime_t)
182  * @delta:	slack in expires timeout (ktime_t)
195 	 * Optimize when a zero timeout value is given. It does not
228  * schedule_hrtimeout_range - sleep until timeout
229  * @expires:	timeout value (ktime_t)
230  * @delta:	slack in expires timeout (ktime_t)
245  * %TASK_UNINTERRUPTIBLE - at least @timeout time is guaranteed to
269  * schedule_hrtimeout - sleep until timeout
270  * @expires:	timeout value (ktime_t)
315 	unsigned long timeout = msecs_to_jiffies(msecs);
317 	while (timeout)
318 		timeout = schedule_timeout_uninterruptible(timeout);
336 	unsigned long timeout = msecs_to_jiffies(msecs);
338 	while (timeout && !signal_pending(current))
339 		timeout = schedule_timeout_interruptible(timeout);
340 	return jiffies_to_msecs(timeout);