106 lines
3.0 KiB
C++
106 lines
3.0 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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The code included in this file is provided under the terms of the ISC license
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http://www.isc.org/downloads/software-support-policy/isc-license. Permission
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To use, copy, modify, and/or distribute this software for any purpose with or
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without fee is hereby granted provided that the above copyright notice and
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this permission notice appear in all copies.
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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namespace juce
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{
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//==============================================================================
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/* An internal message pump class used in OSX and iOS. */
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class MessageQueue
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{
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public:
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MessageQueue()
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{
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#if JUCE_IOS
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runLoop = CFRunLoopGetCurrent();
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#else
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runLoop = CFRunLoopGetMain();
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#endif
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CFRunLoopSourceContext sourceContext;
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zerostruct (sourceContext); // (can't use "= { 0 }" on this object because it's typedef'ed as a C struct)
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sourceContext.info = this;
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sourceContext.perform = runLoopSourceCallback;
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runLoopSource = CFRunLoopSourceCreate (kCFAllocatorDefault, 1, &sourceContext);
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CFRunLoopAddSource (runLoop, runLoopSource, kCFRunLoopCommonModes);
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}
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~MessageQueue() noexcept
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{
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CFRunLoopRemoveSource (runLoop, runLoopSource, kCFRunLoopCommonModes);
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CFRunLoopSourceInvalidate (runLoopSource);
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CFRelease (runLoopSource);
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}
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void post (MessageManager::MessageBase* const message)
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{
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messages.add (message);
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wakeUp();
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}
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private:
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ReferenceCountedArray<MessageManager::MessageBase, CriticalSection> messages;
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CFRunLoopRef runLoop;
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CFRunLoopSourceRef runLoopSource;
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void wakeUp() noexcept
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{
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CFRunLoopSourceSignal (runLoopSource);
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CFRunLoopWakeUp (runLoop);
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}
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bool deliverNextMessage()
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{
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const MessageManager::MessageBase::Ptr nextMessage (messages.removeAndReturn (0));
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if (nextMessage == nullptr)
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return false;
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JUCE_AUTORELEASEPOOL
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{
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JUCE_TRY
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{
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nextMessage->messageCallback();
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}
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JUCE_CATCH_EXCEPTION
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}
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return true;
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}
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void runLoopCallback() noexcept
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{
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for (int i = 4; --i >= 0;)
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if (! deliverNextMessage())
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return;
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wakeUp();
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}
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static void runLoopSourceCallback (void* info) noexcept
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{
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static_cast<MessageQueue*> (info)->runLoopCallback();
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}
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};
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} // namespace juce
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