From 40736c5763bf61337c8c14e16d8587db021a87d4 Mon Sep 17 00:00:00 2001 From: Simon Hausmann Date: Fri, 6 Jan 2012 14:44:00 +0100 Subject: Imported WebKit commit 2ea9d364d0f6efa8fa64acf19f451504c59be0e4 (http://svn.webkit.org/repository/webkit/trunk@104285) --- .../wtf/ThreadIdentifierDataPthreads.h | 78 ++++++++++++++++++++++ 1 file changed, 78 insertions(+) create mode 100644 Source/JavaScriptCore/wtf/ThreadIdentifierDataPthreads.h (limited to 'Source/JavaScriptCore/wtf/ThreadIdentifierDataPthreads.h') diff --git a/Source/JavaScriptCore/wtf/ThreadIdentifierDataPthreads.h b/Source/JavaScriptCore/wtf/ThreadIdentifierDataPthreads.h new file mode 100644 index 000000000..84349a0cd --- /dev/null +++ b/Source/JavaScriptCore/wtf/ThreadIdentifierDataPthreads.h @@ -0,0 +1,78 @@ +/* + * Copyright (C) 2009 Google Inc. All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are + * met: + * + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following disclaimer + * in the documentation and/or other materials provided with the + * distribution. + * * Neither the name of Google Inc. nor the names of its + * contributors may be used to endorse or promote products derived from + * this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR + * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT + * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, + * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT + * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE + * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef ThreadIdentifierDataPthreads_h +#define ThreadIdentifierDataPthreads_h + +#include + +namespace WTF { + +// Holds ThreadIdentifier in the thread-specific storage and employs pthreads-specific 2-pass destruction to reliably remove +// ThreadIdentifier from threadMap. It assumes regular ThreadSpecific types don't use multiple-pass destruction. +class ThreadIdentifierData { + WTF_MAKE_NONCOPYABLE(ThreadIdentifierData); +public: + ~ThreadIdentifierData(); + + // One time initialization for this class as a whole. + // This method must be called before initialize() and it is not thread-safe. + static void initializeOnce(); + + // Creates and puts an instance of ThreadIdentifierData into thread-specific storage. + static void initialize(ThreadIdentifier identifier); + + // Returns 0 if thread-specific storage was not initialized. + static ThreadIdentifier identifier(); + +private: + ThreadIdentifierData(ThreadIdentifier identifier) + : m_identifier(identifier) + , m_isDestroyedOnce(false) + { + } + + // This thread-specific destructor is called 2 times when thread terminates: + // - first, when all the other thread-specific destructors are called, it simply remembers it was 'destroyed once' + // and re-sets itself into the thread-specific slot to make Pthreads to call it again later. + // - second, after all thread-specific destructors were invoked, it gets called again - this time, we remove the + // ThreadIdentifier from the threadMap, completing the cleanup. + static void destruct(void* data); + + ThreadIdentifier m_identifier; + bool m_isDestroyedOnce; + static pthread_key_t m_key; +}; + +} // namespace WTF + +#endif // ThreadIdentifierDataPthreads_h + + -- cgit v1.2.1