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https://github.com/juce-framework/JUCE.git
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Windows: Added an overflow buffer to the event loop to catch messages posted after hitting the PostMessage() limit
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1fe5e49980
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2 changed files with 200 additions and 120 deletions
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@ -25,110 +25,90 @@ namespace juce
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extern HWND juce_messageWindowHandle;
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#if JUCE_MODULE_AVAILABLE_juce_audio_plugin_client && JucePlugin_Build_Unity
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bool juce_isRunningInUnity();
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#endif
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#if JUCE_MODULE_AVAILABLE_juce_gui_extra
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LRESULT juce_offerEventToActiveXControl (::MSG&);
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#endif
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using CheckEventBlockedByModalComps = bool (*)(const MSG&);
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CheckEventBlockedByModalComps isEventBlockedByModalComps = nullptr;
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using SettingChangeCallbackFunc = void (*)(void);
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SettingChangeCallbackFunc settingChangeCallback = nullptr;
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#if JUCE_MODULE_AVAILABLE_juce_audio_plugin_client && JucePlugin_Build_Unity
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bool juce_isRunningInUnity();
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#endif
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//==============================================================================
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namespace WindowsMessageHelpers
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class InternalMessageQueue
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{
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const unsigned int customMessageID = WM_USER + 123;
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const unsigned int broadcastMessageMagicNumber = 0xc403;
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const TCHAR messageWindowName[] = _T("JUCEWindow");
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std::unique_ptr<HiddenMessageWindow> messageWindow;
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void dispatchMessageFromLParam (LPARAM lParam)
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public:
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InternalMessageQueue()
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{
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if (auto message = reinterpret_cast<MessageManager::MessageBase*> (lParam))
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{
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JUCE_TRY
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{
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message->messageCallback();
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}
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JUCE_CATCH_EXCEPTION
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message->decReferenceCount();
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}
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messageWindow = std::make_unique<HiddenMessageWindow> (messageWindowName, (WNDPROC) messageWndProc);
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juce_messageWindowHandle = messageWindow->getHWND();
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}
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BOOL CALLBACK broadcastEnumWindowProc (HWND hwnd, LPARAM lParam)
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~InternalMessageQueue()
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{
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if (hwnd != juce_messageWindowHandle)
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{
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TCHAR windowName[64] = { 0 }; // no need to read longer strings than this
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GetWindowText (hwnd, windowName, 63);
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if (String (windowName) == messageWindowName)
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reinterpret_cast<Array<HWND>*> (lParam)->add (hwnd);
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juce_messageWindowHandle = 0;
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clearSingletonInstance();
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}
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return TRUE;
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}
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void handleBroadcastMessage (const COPYDATASTRUCT* data)
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{
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if (data != nullptr && data->dwData == broadcastMessageMagicNumber)
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{
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struct BroadcastMessage : public CallbackMessage
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{
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BroadcastMessage (CharPointer_UTF32 text, size_t length) : message (text, length) {}
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void messageCallback() override { MessageManager::getInstance()->deliverBroadcastMessage (message); }
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String message;
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};
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(new BroadcastMessage (CharPointer_UTF32 ((const CharPointer_UTF32::CharType*) data->lpData),
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data->cbData / sizeof (CharPointer_UTF32::CharType)))
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->post();
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}
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}
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JUCE_DECLARE_SINGLETON (InternalMessageQueue, false)
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//==============================================================================
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LRESULT CALLBACK messageWndProc (HWND h, UINT message, WPARAM wParam, LPARAM lParam) noexcept
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void broadcastMessage (const String& message)
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{
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if (h == juce_messageWindowHandle)
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auto localCopy = message;
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Array<HWND> windows;
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EnumWindows (&broadcastEnumWindowProc, (LPARAM) &windows);
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for (int i = windows.size(); --i >= 0;)
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{
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if (message == customMessageID)
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{
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// (These are trapped early in our dispatch loop, but must also be checked
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// here in case some 3rd-party code is running the dispatch loop).
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dispatchMessageFromLParam (lParam);
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return 0;
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COPYDATASTRUCT data;
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data.dwData = broadcastMessageMagicNumber;
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data.cbData = (localCopy.length() + 1) * sizeof (CharPointer_UTF32::CharType);
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data.lpData = (void*) localCopy.toUTF32().getAddress();
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DWORD_PTR result;
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SendMessageTimeout (windows.getUnchecked (i), WM_COPYDATA,
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(WPARAM) juce_messageWindowHandle,
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(LPARAM) &data,
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SMTO_BLOCK | SMTO_ABORTIFHUNG, 8000, &result);
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}
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}
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if (message == WM_COPYDATA)
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bool postMessage (MessageManager::MessageBase* message)
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{
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handleBroadcastMessage (reinterpret_cast<const COPYDATASTRUCT*> (lParam));
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return 0;
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message->incReferenceCount();
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#if JUCE_MODULE_AVAILABLE_juce_audio_plugin_client && JucePlugin_Build_Unity
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if (juce_isRunningInUnity())
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return SendNotifyMessage (juce_messageWindowHandle, customMessageID, 0, (LPARAM) message) != 0;
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#endif
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if (PostMessage (juce_messageWindowHandle, customMessageID, 0, (LPARAM) message) != 0)
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return true;
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if (GetLastError() == ERROR_NOT_ENOUGH_QUOTA)
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{
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const ScopedLock sl (lock);
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overflowQueue.add (message);
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message->decReferenceCount();
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return true;
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}
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if (message == WM_SETTINGCHANGE)
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if (settingChangeCallback != nullptr)
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settingChangeCallback();
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return false;
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}
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return DefWindowProc (h, message, wParam, lParam);
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}
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}
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#if JUCE_MODULE_AVAILABLE_juce_gui_extra
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LRESULT juce_offerEventToActiveXControl (::MSG&);
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#endif
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//==============================================================================
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bool MessageManager::dispatchNextMessageOnSystemQueue (bool returnIfNoPendingMessages)
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{
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using namespace WindowsMessageHelpers;
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bool dispatchNextMessage (bool returnIfNoPendingMessages)
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{
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MSG m;
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if (returnIfNoPendingMessages && ! PeekMessage (&m, (HWND) 0, 0, 0, PM_NOREMOVE))
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if (returnIfNoPendingMessages && ! PeekMessage (&m, (HWND) 0, 0, 0, PM_NOREMOVE) && overflowQueue.size() == 0)
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return false;
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if (GetMessage (&m, (HWND) 0, 0, 0) >= 0)
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@ -165,57 +145,157 @@ bool MessageManager::dispatchNextMessageOnSystemQueue (bool returnIfNoPendingMes
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}
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}
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dispatchOverflowMessages();
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return true;
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}
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private:
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//==============================================================================
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static LRESULT CALLBACK messageWndProc (HWND h, UINT message, WPARAM wParam, LPARAM lParam) noexcept
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{
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if (h == juce_messageWindowHandle)
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{
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if (message == customMessageID)
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{
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// (These are trapped early in our dispatch loop, but must also be checked
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// here in case some 3rd-party code is running the dispatch loop).
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dispatchMessageFromLParam (lParam);
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if (auto* queue = InternalMessageQueue::getInstanceWithoutCreating())
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queue->dispatchOverflowMessages();
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return 0;
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}
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if (message == WM_COPYDATA)
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{
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handleBroadcastMessage (reinterpret_cast<const COPYDATASTRUCT*> (lParam));
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return 0;
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}
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if (message == WM_SETTINGCHANGE)
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if (settingChangeCallback != nullptr)
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settingChangeCallback();
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}
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return DefWindowProc (h, message, wParam, lParam);
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}
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static BOOL CALLBACK broadcastEnumWindowProc (HWND hwnd, LPARAM lParam)
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{
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if (hwnd != juce_messageWindowHandle)
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{
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TCHAR windowName[64] = { 0 }; // no need to read longer strings than this
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GetWindowText (hwnd, windowName, 63);
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if (String (windowName) == messageWindowName)
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reinterpret_cast<Array<HWND>*> (lParam)->add (hwnd);
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}
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return TRUE;
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}
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static void dispatchMessageFromLParam (LPARAM lParam)
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{
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if (auto message = reinterpret_cast<MessageManager::MessageBase*> (lParam))
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{
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JUCE_TRY
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{
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message->messageCallback();
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}
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JUCE_CATCH_EXCEPTION
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message->decReferenceCount();
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}
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}
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static void handleBroadcastMessage (const COPYDATASTRUCT* data)
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{
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if (data != nullptr && data->dwData == broadcastMessageMagicNumber)
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{
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struct BroadcastMessage : public CallbackMessage
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{
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BroadcastMessage (CharPointer_UTF32 text, size_t length) : message (text, length) {}
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void messageCallback() override { MessageManager::getInstance()->deliverBroadcastMessage (message); }
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String message;
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};
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(new BroadcastMessage (CharPointer_UTF32 ((const CharPointer_UTF32::CharType*) data->lpData),
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data->cbData / sizeof (CharPointer_UTF32::CharType)))
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->post();
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}
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}
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void dispatchOverflowMessages()
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{
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const ScopedLock sl (lock);
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for (int i = 0; i < overflowQueue.size(); ++i)
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{
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auto message = overflowQueue.getUnchecked (i);
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message->incReferenceCount();
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dispatchMessageFromLParam ((LPARAM) message.get());
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}
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overflowQueue.clear();
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}
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//==============================================================================
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static constexpr unsigned int customMessageID = WM_USER + 123;
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static constexpr unsigned int broadcastMessageMagicNumber = 0xc403;
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static const TCHAR messageWindowName[];
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std::unique_ptr<HiddenMessageWindow> messageWindow;
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CriticalSection lock;
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ReferenceCountedArray<MessageManager::MessageBase> overflowQueue;
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//==============================================================================
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (InternalMessageQueue)
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};
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JUCE_IMPLEMENT_SINGLETON (InternalMessageQueue)
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const TCHAR InternalMessageQueue::messageWindowName[] = _T("JUCEWindow");
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//==============================================================================
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bool MessageManager::dispatchNextMessageOnSystemQueue (bool returnIfNoPendingMessages)
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{
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if (auto* queue = InternalMessageQueue::getInstanceWithoutCreating())
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return queue->dispatchNextMessage (returnIfNoPendingMessages);
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return false;
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}
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bool MessageManager::postMessageToSystemQueue (MessageManager::MessageBase* const message)
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{
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message->incReferenceCount();
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if (auto* queue = InternalMessageQueue::getInstanceWithoutCreating())
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{
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queue->postMessage (message);
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return true;
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}
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#if JUCE_MODULE_AVAILABLE_juce_audio_plugin_client && JucePlugin_Build_Unity
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if (juce_isRunningInUnity())
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return SendNotifyMessage (juce_messageWindowHandle, WindowsMessageHelpers::customMessageID, 0, (LPARAM) message) != 0;
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#endif
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return PostMessage (juce_messageWindowHandle, WindowsMessageHelpers::customMessageID, 0, (LPARAM) message) != 0;
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return false;
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}
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void MessageManager::broadcastMessage (const String& value)
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{
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auto localCopy = value;
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Array<HWND> windows;
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EnumWindows (&WindowsMessageHelpers::broadcastEnumWindowProc, (LPARAM) &windows);
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for (int i = windows.size(); --i >= 0;)
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{
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COPYDATASTRUCT data;
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data.dwData = WindowsMessageHelpers::broadcastMessageMagicNumber;
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data.cbData = (localCopy.length() + 1) * sizeof (CharPointer_UTF32::CharType);
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data.lpData = (void*) localCopy.toUTF32().getAddress();
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DWORD_PTR result;
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SendMessageTimeout (windows.getUnchecked (i), WM_COPYDATA,
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(WPARAM) juce_messageWindowHandle,
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(LPARAM) &data,
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SMTO_BLOCK | SMTO_ABORTIFHUNG, 8000, &result);
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}
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if (auto* queue = InternalMessageQueue::getInstanceWithoutCreating())
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queue->broadcastMessage (value);
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}
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//==============================================================================
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void MessageManager::doPlatformSpecificInitialisation()
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{
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OleInitialize (0);
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using namespace WindowsMessageHelpers;
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messageWindow.reset (new HiddenMessageWindow (messageWindowName, (WNDPROC) messageWndProc));
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juce_messageWindowHandle = messageWindow->getHWND();
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InternalMessageQueue::getInstance();
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}
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void MessageManager::doPlatformSpecificShutdown()
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{
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WindowsMessageHelpers::messageWindow = nullptr;
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InternalMessageQueue::deleteInstance();
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OleUninitialize();
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}
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@ -56,7 +56,7 @@ extern void juce_repeatLastProcessPriority();
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extern void juce_checkCurrentlyFocusedTopLevelWindow(); // in juce_TopLevelWindow.cpp
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extern bool juce_isRunningInWine();
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typedef bool (*CheckEventBlockedByModalComps) (const MSG&);
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using CheckEventBlockedByModalComps = bool (*)(const MSG&);
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extern CheckEventBlockedByModalComps isEventBlockedByModalComps;
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static bool shouldDeactivateTitleBar = true;
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@ -496,7 +496,7 @@ static double getGlobalDPI()
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#endif
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//==============================================================================
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typedef void (*SettingChangeCallbackFunc) (void);
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using SettingChangeCallbackFunc = void (*)(void);
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extern SettingChangeCallbackFunc settingChangeCallback;
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//==============================================================================
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