diff options
author | Steve Block <steveblock@google.com> | 2011-05-06 11:45:16 +0100 |
---|---|---|
committer | Steve Block <steveblock@google.com> | 2011-05-12 13:44:10 +0100 |
commit | cad810f21b803229eb11403f9209855525a25d57 (patch) | |
tree | 29a6fd0279be608e0fe9ffe9841f722f0f4e4269 /Source/WebCore/fileapi/FileThread.cpp | |
parent | 121b0cf4517156d0ac5111caf9830c51b69bae8f (diff) | |
download | external_webkit-cad810f21b803229eb11403f9209855525a25d57.zip external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.gz external_webkit-cad810f21b803229eb11403f9209855525a25d57.tar.bz2 |
Merge WebKit at r75315: Initial merge by git.
Change-Id: I570314b346ce101c935ed22a626b48c2af266b84
Diffstat (limited to 'Source/WebCore/fileapi/FileThread.cpp')
-rw-r--r-- | Source/WebCore/fileapi/FileThread.cpp | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/Source/WebCore/fileapi/FileThread.cpp b/Source/WebCore/fileapi/FileThread.cpp new file mode 100644 index 0000000..4d55630 --- /dev/null +++ b/Source/WebCore/fileapi/FileThread.cpp @@ -0,0 +1,119 @@ +/* + * Copyright (C) 2010 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. + */ + +#include "config.h" + +#if ENABLE(BLOB) || ENABLE(FILE_SYSTEM) + +#include "FileThread.h" + +#include "AutodrainedPool.h" +#include "Logging.h" + +namespace WebCore { + +FileThread::FileThread() + : m_threadID(0) +{ + m_selfRef = this; +} + +FileThread::~FileThread() +{ + ASSERT(m_queue.killed()); +} + +bool FileThread::start() +{ + MutexLocker lock(m_threadCreationMutex); + if (m_threadID) + return true; + m_threadID = createThread(FileThread::fileThreadStart, this, "WebCore: File"); + return m_threadID; +} + +void FileThread::stop() +{ + m_queue.kill(); +} + +void FileThread::postTask(PassOwnPtr<Task> task) +{ + m_queue.append(task); +} + +class SameInstancePredicate { +public: + SameInstancePredicate(const void* instance) : m_instance(instance) { } + bool operator()(FileThread::Task* task) const { return task->instance() == m_instance; } +private: + const void* m_instance; +}; + +void FileThread::unscheduleTasks(const void* instance) +{ + SameInstancePredicate predicate(instance); + m_queue.removeIf(predicate); +} + +void* FileThread::fileThreadStart(void* arg) +{ + FileThread* fileThread = static_cast<FileThread*>(arg); + return fileThread->runLoop(); +} + +void* FileThread::runLoop() +{ + { + // Wait for FileThread::start() to complete to have m_threadID + // established before starting the main loop. + MutexLocker lock(m_threadCreationMutex); + LOG(FileAPI, "Started FileThread %p", this); + } + + AutodrainedPool pool; + while (OwnPtr<Task> task = m_queue.waitForMessage()) { + task->performTask(); + pool.cycle(); + } + + LOG(FileAPI, "About to detach thread %i and clear the ref to FileThread %p, which currently has %i ref(s)", m_threadID, this, refCount()); + + detachThread(m_threadID); + + // Clear the self refptr, possibly resulting in deletion + m_selfRef = 0; + + return 0; +} + +} // namespace WebCore + +#endif // ENABLE(BLOB) || ENABLE(FILE_SYSTEM) |