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| 1 /* | |
| 2 * Copyright (C) 2006 Apple Computer, 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 COMPUTER, INC. ``AS IS'' AND ANY | |
| 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE | |
| 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | |
| 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR | |
| 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | |
| 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | |
| 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | |
| 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY | |
| 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 24 */ | |
| 25 | |
| 26 #include "config.h" | |
| 27 #include "SharedTimer.h" | |
| 28 | |
| 29 #include "Page.h" | |
| 30 #include "Settings.h" | |
| 31 #include "WebCoreInstanceHandle.h" | |
| 32 #include "Widget.h" | |
| 33 #include <wtf/Assertions.h> | |
| 34 #include <wtf/CurrentTime.h> | |
| 35 | |
| 36 #include "WindowsExtras.h" | |
| 37 #include <mmsystem.h> | |
| 38 | |
| 39 #if PLATFORM(WIN) | |
| 40 #include "PluginView.h" | |
| 41 #endif | |
| 42 | |
| 43 // These aren't in winuser.h with the MSVS 2003 Platform SDK, | |
| 44 // so use default values in that case. | |
| 45 #ifndef USER_TIMER_MINIMUM | |
| 46 #define USER_TIMER_MINIMUM 0x0000000A | |
| 47 #endif | |
| 48 | |
| 49 #ifndef USER_TIMER_MAXIMUM | |
| 50 #define USER_TIMER_MAXIMUM 0x7FFFFFFF | |
| 51 #endif | |
| 52 | |
| 53 #ifndef QS_RAWINPUT | |
| 54 #define QS_RAWINPUT 0x0400 | |
| 55 #endif | |
| 56 | |
| 57 namespace WebCore { | |
| 58 | |
| 59 static UINT timerID; | |
| 60 static void (*sharedTimerFiredFunction)(); | |
| 61 | |
| 62 static HANDLE timer; | |
| 63 static HWND timerWindowHandle = 0; | |
| 64 const LPCWSTR kTimerWindowClassName = L"TimerWindowClass"; | |
| 65 | |
| 66 #if !OS(WINCE) | |
| 67 static UINT timerFiredMessage = 0; | |
| 68 static HANDLE timerQueue; | |
| 69 static bool highResTimerActive; | |
| 70 static bool processingCustomTimerMessage = false; | |
| 71 static LONG pendingTimers; | |
| 72 | |
| 73 const int timerResolution = 1; // To improve timer resolution, we call timeBegin
Period/timeEndPeriod with this value to increase timer resolution to 1ms. | |
| 74 const int highResolutionThresholdMsec = 16; // Only activate high-res timer for
sub-16ms timers (Windows can fire timers at 16ms intervals without changing the
system resolution). | |
| 75 const int stopHighResTimerInMsec = 300; // Stop high-res timer after 0.3 seconds
to lessen power consumption (we don't use a smaller time since oscillating betw
een high and low resolution breaks timer accuracy on XP). | |
| 76 #endif | |
| 77 | |
| 78 enum { | |
| 79 sharedTimerID = 1000, | |
| 80 endHighResTimerID = 1001, | |
| 81 }; | |
| 82 | |
| 83 LRESULT CALLBACK TimerWindowWndProc(HWND hWnd, UINT message, WPARAM wParam, LPAR
AM lParam) | |
| 84 { | |
| 85 #if PLATFORM(WIN) | |
| 86 // Windows Media Player has a modal message loop that will deliver messages | |
| 87 // to us at inappropriate times and we will crash if we handle them when | |
| 88 // they are delivered. We repost all messages so that we will get to handle | |
| 89 // them once the modal loop exits. | |
| 90 if (PluginView::isCallingPlugin()) { | |
| 91 PostMessage(hWnd, message, wParam, lParam); | |
| 92 return 0; | |
| 93 } | |
| 94 #endif | |
| 95 | |
| 96 if (message == WM_TIMER) { | |
| 97 if (wParam == sharedTimerID) { | |
| 98 KillTimer(timerWindowHandle, sharedTimerID); | |
| 99 sharedTimerFiredFunction(); | |
| 100 } | |
| 101 #if !OS(WINCE) | |
| 102 else if (wParam == endHighResTimerID) { | |
| 103 KillTimer(timerWindowHandle, endHighResTimerID); | |
| 104 highResTimerActive = false; | |
| 105 timeEndPeriod(timerResolution); | |
| 106 } | |
| 107 } else if (message == timerFiredMessage) { | |
| 108 InterlockedExchange(&pendingTimers, 0); | |
| 109 processingCustomTimerMessage = true; | |
| 110 sharedTimerFiredFunction(); | |
| 111 processingCustomTimerMessage = false; | |
| 112 #endif | |
| 113 } else | |
| 114 return DefWindowProc(hWnd, message, wParam, lParam); | |
| 115 | |
| 116 return 0; | |
| 117 } | |
| 118 | |
| 119 static void initializeOffScreenTimerWindow() | |
| 120 { | |
| 121 if (timerWindowHandle) | |
| 122 return; | |
| 123 | |
| 124 #if OS(WINCE) | |
| 125 WNDCLASS wcex; | |
| 126 memset(&wcex, 0, sizeof(WNDCLASS)); | |
| 127 #else | |
| 128 WNDCLASSEX wcex; | |
| 129 memset(&wcex, 0, sizeof(WNDCLASSEX)); | |
| 130 wcex.cbSize = sizeof(WNDCLASSEX); | |
| 131 #endif | |
| 132 | |
| 133 wcex.lpfnWndProc = TimerWindowWndProc; | |
| 134 wcex.hInstance = WebCore::instanceHandle(); | |
| 135 wcex.lpszClassName = kTimerWindowClassName; | |
| 136 #if OS(WINCE) | |
| 137 RegisterClass(&wcex); | |
| 138 #else | |
| 139 RegisterClassEx(&wcex); | |
| 140 #endif | |
| 141 | |
| 142 timerWindowHandle = CreateWindow(kTimerWindowClassName, 0, 0, | |
| 143 CW_USEDEFAULT, 0, CW_USEDEFAULT, 0, HWND_MESSAGE, 0, WebCore::instanceHan
dle(), 0); | |
| 144 | |
| 145 #if !OS(WINCE) | |
| 146 timerFiredMessage = RegisterWindowMessage(L"com.apple.WebKit.TimerFired"); | |
| 147 #endif | |
| 148 } | |
| 149 | |
| 150 void setSharedTimerFiredFunction(void (*f)()) | |
| 151 { | |
| 152 sharedTimerFiredFunction = f; | |
| 153 } | |
| 154 | |
| 155 #if !OS(WINCE) | |
| 156 static void NTAPI queueTimerProc(PVOID, BOOLEAN) | |
| 157 { | |
| 158 if (InterlockedIncrement(&pendingTimers) == 1) | |
| 159 PostMessage(timerWindowHandle, timerFiredMessage, 0, 0); | |
| 160 } | |
| 161 #endif | |
| 162 | |
| 163 void setSharedTimerFireInterval(double interval) | |
| 164 { | |
| 165 ASSERT(sharedTimerFiredFunction); | |
| 166 | |
| 167 unsigned intervalInMS; | |
| 168 interval *= 1000; | |
| 169 if (interval > USER_TIMER_MAXIMUM) | |
| 170 intervalInMS = USER_TIMER_MAXIMUM; | |
| 171 else | |
| 172 intervalInMS = static_cast<unsigned>(interval); | |
| 173 | |
| 174 initializeOffScreenTimerWindow(); | |
| 175 bool timerSet = false; | |
| 176 | |
| 177 #if !OS(WINCE) | |
| 178 if (Settings::shouldUseHighResolutionTimers()) { | |
| 179 if (interval < highResolutionThresholdMsec) { | |
| 180 if (!highResTimerActive) { | |
| 181 highResTimerActive = true; | |
| 182 timeBeginPeriod(timerResolution); | |
| 183 } | |
| 184 SetTimer(timerWindowHandle, endHighResTimerID, stopHighResTimerInMse
c, 0); | |
| 185 } | |
| 186 | |
| 187 DWORD queueStatus = LOWORD(GetQueueStatus(QS_PAINT | QS_MOUSEBUTTON | QS
_KEY | QS_RAWINPUT)); | |
| 188 | |
| 189 // Win32 has a tri-level queue with application messages > user input >
WM_PAINT/WM_TIMER. | |
| 190 | |
| 191 // If the queue doesn't contains input events, we use a higher priorty t
imer event posting mechanism. | |
| 192 if (!(queueStatus & (QS_MOUSEBUTTON | QS_KEY | QS_RAWINPUT))) { | |
| 193 if (intervalInMS < USER_TIMER_MINIMUM && !processingCustomTimerMessa
ge && !(queueStatus & QS_PAINT)) { | |
| 194 // Call PostMessage immediately if the timer is already expired,
unless a paint is pending. | |
| 195 // (we prioritize paints over timers) | |
| 196 if (InterlockedIncrement(&pendingTimers) == 1) | |
| 197 PostMessage(timerWindowHandle, timerFiredMessage, 0, 0); | |
| 198 timerSet = true; | |
| 199 } else { | |
| 200 // Otherwise, delay the PostMessage via a CreateTimerQueueTimer | |
| 201 if (!timerQueue) | |
| 202 timerQueue = CreateTimerQueue(); | |
| 203 if (timer) | |
| 204 DeleteTimerQueueTimer(timerQueue, timer, 0); | |
| 205 timerSet = CreateTimerQueueTimer(&timer, timerQueue, queueTimerP
roc, 0, intervalInMS, 0, WT_EXECUTEINTIMERTHREAD | WT_EXECUTEONLYONCE); | |
| 206 } | |
| 207 } | |
| 208 } | |
| 209 #endif // !OS(WINCE) | |
| 210 | |
| 211 if (timerSet) { | |
| 212 if (timerID) { | |
| 213 KillTimer(timerWindowHandle, timerID); | |
| 214 timerID = 0; | |
| 215 } | |
| 216 } else { | |
| 217 timerID = SetTimer(timerWindowHandle, sharedTimerID, intervalInMS, 0); | |
| 218 timer = 0; | |
| 219 } | |
| 220 } | |
| 221 | |
| 222 void stopSharedTimer() | |
| 223 { | |
| 224 #if !OS(WINCE) | |
| 225 if (timerQueue && timer) { | |
| 226 DeleteTimerQueueTimer(timerQueue, timer, 0); | |
| 227 timer = 0; | |
| 228 } | |
| 229 #endif | |
| 230 | |
| 231 if (timerID) { | |
| 232 KillTimer(timerWindowHandle, timerID); | |
| 233 timerID = 0; | |
| 234 } | |
| 235 } | |
| 236 | |
| 237 } | |
| OLD | NEW |
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Chromium Code Reviews
Issue 13642009:
WebCore: Remove PLATFORM(WIN) files we do not use. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk