wakeup.c (6791e36c4a40e8930e08669e60077eea6770c429) wakeup.c (7483b4a4d9abf9dcf1ffe6e805ead2847ec3264e)
1/*
2 * drivers/base/power/wakeup.c - System wakeup events framework
3 *
4 * Copyright (c) 2010 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
5 *
6 * This file is released under the GPLv2.
7 */
8

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655 }
656 spin_unlock_irqrestore(&events_lock, flags);
657 return ret;
658}
659
660/**
661 * pm_get_wakeup_count - Read the number of registered wakeup events.
662 * @count: Address to store the value at.
1/*
2 * drivers/base/power/wakeup.c - System wakeup events framework
3 *
4 * Copyright (c) 2010 Rafael J. Wysocki <rjw@sisk.pl>, Novell Inc.
5 *
6 * This file is released under the GPLv2.
7 */
8

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655 }
656 spin_unlock_irqrestore(&events_lock, flags);
657 return ret;
658}
659
660/**
661 * pm_get_wakeup_count - Read the number of registered wakeup events.
662 * @count: Address to store the value at.
663 * @block: Whether or not to block.
663 *
664 *
664 * Store the number of registered wakeup events at the address in @count. Block
665 * if the current number of wakeup events being processed is nonzero.
665 * Store the number of registered wakeup events at the address in @count. If
666 * @block is set, block until the current number of wakeup events being
667 * processed is zero.
666 *
668 *
667 * Return 'false' if the wait for the number of wakeup events being processed to
668 * drop down to zero has been interrupted by a signal (and the current number
669 * of wakeup events being processed is still nonzero). Otherwise return 'true'.
669 * Return 'false' if the current number of wakeup events being processed is
670 * nonzero. Otherwise return 'true'.
670 */
671 */
671bool pm_get_wakeup_count(unsigned int *count)
672bool pm_get_wakeup_count(unsigned int *count, bool block)
672{
673 unsigned int cnt, inpr;
673{
674 unsigned int cnt, inpr;
674 DEFINE_WAIT(wait);
675
675
676 for (;;) {
677 prepare_to_wait(&wakeup_count_wait_queue, &wait,
678 TASK_INTERRUPTIBLE);
679 split_counters(&cnt, &inpr);
680 if (inpr == 0 || signal_pending(current))
681 break;
676 if (block) {
677 DEFINE_WAIT(wait);
682
678
683 schedule();
679 for (;;) {
680 prepare_to_wait(&wakeup_count_wait_queue, &wait,
681 TASK_INTERRUPTIBLE);
682 split_counters(&cnt, &inpr);
683 if (inpr == 0 || signal_pending(current))
684 break;
685
686 schedule();
687 }
688 finish_wait(&wakeup_count_wait_queue, &wait);
684 }
689 }
685 finish_wait(&wakeup_count_wait_queue, &wait);
686
687 split_counters(&cnt, &inpr);
688 *count = cnt;
689 return !inpr;
690}
691
692/**
693 * pm_save_wakeup_count - Save the current number of registered wakeup events.

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691 split_counters(&cnt, &inpr);
692 *count = cnt;
693 return !inpr;
694}
695
696/**
697 * pm_save_wakeup_count - Save the current number of registered wakeup events.

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