1/*
2 * Copyright (C) 2006, 2010, 2011, 2013 Apple Inc.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1.  Redistributions of source code must retain the above copyright
8 *     notice, this list of conditions and the following disclaimer.
9 * 2.  Redistributions in binary form must reproduce the above copyright
10 *     notice, this list of conditions and the following disclaimer in the
11 *     documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
16 * DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
17 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
18 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
19 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
20 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
22 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 */
24
25#import "config.h"
26#import "SharedTimer.h"
27
28#import "WebCoreThread.h"
29#import "WebCoreThreadRun.h"
30#import <wtf/Assertions.h>
31
32using namespace WebCore;
33
34namespace WebCore {
35static CFRunLoopTimerRef sharedTimer;
36static void timerFired(CFRunLoopTimerRef, void*);
37
38static void applicationDidBecomeActive(CFNotificationCenterRef, void*, CFStringRef, const void*, CFDictionaryRef)
39{
40    WebThreadRun(^{
41        if (!sharedTimer)
42            return;
43
44        stopSharedTimer();
45        timerFired(0, 0);
46    });
47}
48
49typedef void (*SharedTimerFiredFunction)();
50static SharedTimerFiredFunction sharedTimerFiredFunction;
51
52void setSharedTimerFiredFunction(SharedTimerFiredFunction function)
53{
54    ASSERT(!sharedTimerFiredFunction || sharedTimerFiredFunction == function);
55
56    sharedTimerFiredFunction = function;
57}
58
59static void timerFired(CFRunLoopTimerRef, void*)
60{
61    @autoreleasepool {
62        sharedTimerFiredFunction();
63    }
64}
65
66void setSharedTimerFireInterval(double interval)
67{
68    ASSERT(sharedTimerFiredFunction);
69
70    if (sharedTimer) {
71        CFRunLoopTimerInvalidate(sharedTimer);
72        CFRelease(sharedTimer);
73    }
74
75    CFAbsoluteTime fireDate = CFAbsoluteTimeGetCurrent() + interval;
76    sharedTimer = CFRunLoopTimerCreate(0, fireDate, 0, 0, 0, timerFired, 0);
77    CFRunLoopAddTimer(WebThreadRunLoop(), sharedTimer, kCFRunLoopCommonModes);
78
79    static bool registeredForApplicationNotification = false;
80    if (!registeredForApplicationNotification) {
81        registeredForApplicationNotification = true;
82        CFNotificationCenterRef notificationCenter = CFNotificationCenterGetLocalCenter();
83        CFNotificationCenterAddObserver(notificationCenter, 0, applicationDidBecomeActive, CFSTR("UIApplicationDidBecomeActiveNotification"), NULL, CFNotificationSuspensionBehaviorCoalesce);
84    }
85}
86
87void stopSharedTimer()
88{
89    if (!sharedTimer)
90        return;
91
92    CFRunLoopTimerInvalidate(sharedTimer);
93    CFRelease(sharedTimer);
94    sharedTimer = 0;
95}
96
97} // namespace WebCore
98