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https://github.com/darlinghq/darling-WTF.git
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58 lines
2.2 KiB
C++
58 lines
2.2 KiB
C++
/*
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* Copyright (C) 2016 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
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* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include <wtf/PrintStream.h>
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#include <wtf/RecursiveLockAdapter.h>
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#include <wtf/WordLock.h>
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namespace WTF {
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// Makes every call to print() atomic.
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class LockedPrintStream final : public PrintStream {
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public:
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LockedPrintStream(std::unique_ptr<PrintStream> target);
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~LockedPrintStream() final;
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void vprintf(const char* format, va_list) final WTF_ATTRIBUTE_PRINTF(2, 0);
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void flush() final;
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private:
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PrintStream& begin() final;
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void end() final;
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// This needs to be a recursive lock because a printInternal or dump method could assert,
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// and that assert might want to log. Better to let it. This needs to be a WordLock so that
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// LockedPrintStream (i.e. cataLog) can be used to debug ParkingLot and Lock.
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RecursiveLockAdapter<WordLock> m_lock;
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std::unique_ptr<PrintStream> m_target;
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};
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} // namespace WTF
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using WTF::LockedPrintStream;
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