| 1 | /* |
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| 2 | * Copyright (C) 2007, 2008 Apple Inc. All rights reserved. |
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| 3 | * Copyright (C) 2007 Justin Haygood (jhaygood@reaktix.com) |
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| 4 | * |
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| 5 | * Redistribution and use in source and binary forms, with or without |
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| 6 | * modification, are permitted provided that the following conditions |
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| 7 | * are met: |
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| 8 | * |
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| 9 | * 1. Redistributions of source code must retain the above copyright |
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| 10 | * notice, this list of conditions and the following disclaimer. |
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| 11 | * 2. Redistributions in binary form must reproduce the above copyright |
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| 12 | * notice, this list of conditions and the following disclaimer in the |
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| 13 | * documentation and/or other materials provided with the distribution. |
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| 14 | * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
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| 15 | * its contributors may be used to endorse or promote products derived |
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| 16 | * from this software without specific prior written permission. |
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| 17 | * |
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| 18 | * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
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| 19 | * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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| 20 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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| 21 | * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
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| 22 | * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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| 23 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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| 24 | * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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| 25 | * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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| 26 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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| 27 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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| 28 | */ |
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| 29 | |
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| 30 | #ifndef MainThread_h |
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| 31 | #define MainThread_h |
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| 32 | |
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| 33 | namespace WTF { |
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| 34 | |
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| 35 | class Mutex; |
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| 36 | |
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| 37 | extern "C" { |
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| 38 | typedef void MainThreadFunction(void*); |
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| 39 | } |
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| 40 | |
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| 41 | void callOnMainThread(MainThreadFunction*, void* context); |
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| 42 | |
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| 43 | // Blocks the thread until the call finishes on the main thread. Misusing this can easily cause deadlocks. |
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| 44 | void callOnMainThreadAndWait(MainThreadFunction*, void* context); |
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| 45 | |
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| 46 | void setMainThreadCallbacksPaused(bool paused); |
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| 47 | |
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| 48 | // Must be called from the main thread (Darwin is an exception to this rule). |
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| 49 | void initializeMainThread(); |
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| 50 | |
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| 51 | // These functions are internal to the callOnMainThread implementation. |
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| 52 | void initializeMainThreadPlatform(); |
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| 53 | void scheduleDispatchFunctionsOnMainThread(); |
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| 54 | Mutex& mainThreadFunctionQueueMutex(); |
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| 55 | void dispatchFunctionsFromMainThread(); |
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| 56 | |
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| 57 | } // namespace WTF |
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| 58 | |
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| 59 | using WTF::callOnMainThread; |
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| 60 | using WTF::callOnMainThreadAndWait; |
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| 61 | using WTF::setMainThreadCallbacksPaused; |
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| 62 | |
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| 63 | #endif // MainThread_h |
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| 64 | |
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