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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "base/message_pump_win.h" | 5 #include "base/message_loop/message_pump_win.h" |
| 6 | 6 |
| 7 #include <math.h> | 7 #include <math.h> |
| 8 | 8 |
| 9 #include "base/debug/trace_event.h" | 9 #include "base/debug/trace_event.h" |
| 10 #include "base/message_loop.h" | 10 #include "base/message_loop/message_loop.h" |
| 11 #include "base/metrics/histogram.h" | 11 #include "base/metrics/histogram.h" |
| 12 #include "base/process_util.h" | 12 #include "base/process_util.h" |
| 13 #include "base/stringprintf.h" | 13 #include "base/stringprintf.h" |
| 14 #include "base/win/wrapped_window_proc.h" | 14 #include "base/win/wrapped_window_proc.h" |
| 15 | 15 |
| 16 namespace base { |
| 17 |
| 16 namespace { | 18 namespace { |
| 17 | 19 |
| 18 enum MessageLoopProblems { | 20 enum MessageLoopProblems { |
| 19 MESSAGE_POST_ERROR, | 21 MESSAGE_POST_ERROR, |
| 20 COMPLETION_POST_ERROR, | 22 COMPLETION_POST_ERROR, |
| 21 SET_TIMER_ERROR, | 23 SET_TIMER_ERROR, |
| 22 MESSAGE_LOOP_PROBLEM_MAX, | 24 MESSAGE_LOOP_PROBLEM_MAX, |
| 23 }; | 25 }; |
| 24 | 26 |
| 25 } // namespace | 27 } // namespace |
| 26 | 28 |
| 27 namespace base { | |
| 28 | |
| 29 static const wchar_t kWndClassFormat[] = L"Chrome_MessagePumpWindow_%p"; | 29 static const wchar_t kWndClassFormat[] = L"Chrome_MessagePumpWindow_%p"; |
| 30 | 30 |
| 31 // Message sent to get an additional time slice for pumping (processing) another | 31 // Message sent to get an additional time slice for pumping (processing) another |
| 32 // task (a series of such messages creates a continuous task pump). | 32 // task (a series of such messages creates a continuous task pump). |
| 33 static const int kMsgHaveWork = WM_USER + 1; | 33 static const int kMsgHaveWork = WM_USER + 1; |
| 34 | 34 |
| 35 //----------------------------------------------------------------------------- | 35 //----------------------------------------------------------------------------- |
| 36 // MessagePumpWin public: | 36 // MessagePumpWin public: |
| 37 | 37 |
| 38 void MessagePumpWin::AddObserver(MessagePumpObserver* observer) { | 38 void MessagePumpWin::AddObserver(MessagePumpObserver* observer) { |
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| 98 | 98 |
| 99 MessagePumpForUI::MessagePumpForUI() | 99 MessagePumpForUI::MessagePumpForUI() |
| 100 : atom_(0), | 100 : atom_(0), |
| 101 message_filter_(new MessageFilter) { | 101 message_filter_(new MessageFilter) { |
| 102 InitMessageWnd(); | 102 InitMessageWnd(); |
| 103 } | 103 } |
| 104 | 104 |
| 105 MessagePumpForUI::~MessagePumpForUI() { | 105 MessagePumpForUI::~MessagePumpForUI() { |
| 106 DestroyWindow(message_hwnd_); | 106 DestroyWindow(message_hwnd_); |
| 107 UnregisterClass(MAKEINTATOM(atom_), | 107 UnregisterClass(MAKEINTATOM(atom_), |
| 108 base::GetModuleFromAddress(&WndProcThunk)); | 108 GetModuleFromAddress(&WndProcThunk)); |
| 109 } | 109 } |
| 110 | 110 |
| 111 void MessagePumpForUI::ScheduleWork() { | 111 void MessagePumpForUI::ScheduleWork() { |
| 112 if (InterlockedExchange(&have_work_, 1)) | 112 if (InterlockedExchange(&have_work_, 1)) |
| 113 return; // Someone else continued the pumping. | 113 return; // Someone else continued the pumping. |
| 114 | 114 |
| 115 // Make sure the MessagePump does some work for us. | 115 // Make sure the MessagePump does some work for us. |
| 116 BOOL ret = PostMessage(message_hwnd_, kMsgHaveWork, | 116 BOOL ret = PostMessage(message_hwnd_, kMsgHaveWork, |
| 117 reinterpret_cast<WPARAM>(this), 0); | 117 reinterpret_cast<WPARAM>(this), 0); |
| 118 if (ret) | 118 if (ret) |
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| 264 | 264 |
| 265 if (more_work_is_plausible) | 265 if (more_work_is_plausible) |
| 266 continue; | 266 continue; |
| 267 | 267 |
| 268 WaitForWork(); // Wait (sleep) until we have work to do again. | 268 WaitForWork(); // Wait (sleep) until we have work to do again. |
| 269 } | 269 } |
| 270 } | 270 } |
| 271 | 271 |
| 272 void MessagePumpForUI::InitMessageWnd() { | 272 void MessagePumpForUI::InitMessageWnd() { |
| 273 // Generate a unique window class name. | 273 // Generate a unique window class name. |
| 274 string16 class_name = base::StringPrintf(kWndClassFormat, this); | 274 string16 class_name = StringPrintf(kWndClassFormat, this); |
| 275 | 275 |
| 276 HINSTANCE instance = base::GetModuleFromAddress(&WndProcThunk); | 276 HINSTANCE instance = GetModuleFromAddress(&WndProcThunk); |
| 277 WNDCLASSEX wc = {0}; | 277 WNDCLASSEX wc = {0}; |
| 278 wc.cbSize = sizeof(wc); | 278 wc.cbSize = sizeof(wc); |
| 279 wc.lpfnWndProc = base::win::WrappedWindowProc<WndProcThunk>; | 279 wc.lpfnWndProc = base::win::WrappedWindowProc<WndProcThunk>; |
| 280 wc.hInstance = instance; | 280 wc.hInstance = instance; |
| 281 wc.lpszClassName = class_name.c_str(); | 281 wc.lpszClassName = class_name.c_str(); |
| 282 atom_ = RegisterClassEx(&wc); | 282 atom_ = RegisterClassEx(&wc); |
| 283 DCHECK(atom_); | 283 DCHECK(atom_); |
| 284 | 284 |
| 285 message_hwnd_ = CreateWindow(MAKEINTATOM(atom_), 0, 0, 0, 0, 0, 0, | 285 message_hwnd_ = CreateWindow(MAKEINTATOM(atom_), 0, 0, 0, 0, 0, 0, |
| 286 HWND_MESSAGE, 0, instance, 0); | 286 HWND_MESSAGE, 0, instance, 0); |
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| 677 | 677 |
| 678 // static | 678 // static |
| 679 MessagePumpForIO::IOHandler* MessagePumpForIO::KeyToHandler( | 679 MessagePumpForIO::IOHandler* MessagePumpForIO::KeyToHandler( |
| 680 ULONG_PTR key, | 680 ULONG_PTR key, |
| 681 bool* has_valid_io_context) { | 681 bool* has_valid_io_context) { |
| 682 *has_valid_io_context = ((key & 1) == 0); | 682 *has_valid_io_context = ((key & 1) == 0); |
| 683 return reinterpret_cast<IOHandler*>(key & ~static_cast<ULONG_PTR>(1)); | 683 return reinterpret_cast<IOHandler*>(key & ~static_cast<ULONG_PTR>(1)); |
| 684 } | 684 } |
| 685 | 685 |
| 686 } // namespace base | 686 } // namespace base |
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