Index: Source/WTF/wtf/ThreadingWin.cpp |
diff --git a/Source/WTF/wtf/ThreadingWin.cpp b/Source/WTF/wtf/ThreadingWin.cpp |
deleted file mode 100644 |
index 49ecc1ae75ec60d27b1f3496619dba66a5f20435..0000000000000000000000000000000000000000 |
--- a/Source/WTF/wtf/ThreadingWin.cpp |
+++ /dev/null |
@@ -1,522 +0,0 @@ |
-/* |
- * Copyright (C) 2007, 2008 Apple Inc. All rights reserved. |
- * Copyright (C) 2009 Google Inc. All rights reserved. |
- * Copyright (C) 2009 Torch Mobile, 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: |
- * |
- * 1. Redistributions of source code must retain the above copyright |
- * notice, this list of conditions and the following disclaimer. |
- * 2. 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. |
- * 3. Neither the name of Apple Computer, Inc. ("Apple") 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 APPLE AND ITS 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 APPLE OR ITS 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. |
- */ |
- |
-/* |
- * There are numerous academic and practical works on how to implement pthread_cond_wait/pthread_cond_signal/pthread_cond_broadcast |
- * functions on Win32. Here is one example: http://www.cs.wustl.edu/~schmidt/win32-cv-1.html which is widely credited as a 'starting point' |
- * of modern attempts. There are several more or less proven implementations, one in Boost C++ library (http://www.boost.org) and another |
- * in pthreads-win32 (http://sourceware.org/pthreads-win32/). |
- * |
- * The number of articles and discussions is the evidence of significant difficulties in implementing these primitives correctly. |
- * The brief search of revisions, ChangeLog entries, discussions in comp.programming.threads and other places clearly documents |
- * numerous pitfalls and performance problems the authors had to overcome to arrive to the suitable implementations. |
- * Optimally, WebKit would use one of those supported/tested libraries directly. To roll out our own implementation is impractical, |
- * if even for the lack of sufficient testing. However, a faithful reproduction of the code from one of the popular supported |
- * libraries seems to be a good compromise. |
- * |
- * The early Boost implementation (http://www.boxbackup.org/trac/browser/box/nick/win/lib/win32/boost_1_32_0/libs/thread/src/condition.cpp?rev=30) |
- * is identical to pthreads-win32 (http://sourceware.org/cgi-bin/cvsweb.cgi/pthreads/pthread_cond_wait.c?rev=1.10&content-type=text/x-cvsweb-markup&cvsroot=pthreads-win32). |
- * Current Boost uses yet another (although seemingly equivalent) algorithm which came from their 'thread rewrite' effort. |
- * |
- * This file includes timedWait/signal/broadcast implementations translated to WebKit coding style from the latest algorithm by |
- * Alexander Terekhov and Louis Thomas, as captured here: http://sourceware.org/cgi-bin/cvsweb.cgi/pthreads/pthread_cond_wait.c?rev=1.10&content-type=text/x-cvsweb-markup&cvsroot=pthreads-win32 |
- * It replaces the implementation of their previous algorithm, also documented in the same source above. |
- * The naming and comments are left very close to original to enable easy cross-check. |
- * |
- * The corresponding Pthreads-win32 License is included below, and CONTRIBUTORS file which it refers to is added to |
- * source directory (as CONTRIBUTORS.pthreads-win32). |
- */ |
- |
-/* |
- * Pthreads-win32 - POSIX Threads Library for Win32 |
- * Copyright(C) 1998 John E. Bossom |
- * Copyright(C) 1999,2005 Pthreads-win32 contributors |
- * |
- * Contact Email: rpj@callisto.canberra.edu.au |
- * |
- * The current list of contributors is contained |
- * in the file CONTRIBUTORS included with the source |
- * code distribution. The list can also be seen at the |
- * following World Wide Web location: |
- * http://sources.redhat.com/pthreads-win32/contributors.html |
- * |
- * This library is free software; you can redistribute it and/or |
- * modify it under the terms of the GNU Lesser General Public |
- * License as published by the Free Software Foundation; either |
- * version 2 of the License, or (at your option) any later version. |
- * |
- * This library is distributed in the hope that it will be useful, |
- * but WITHOUT ANY WARRANTY; without even the implied warranty of |
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
- * Lesser General Public License for more details. |
- * |
- * You should have received a copy of the GNU Lesser General Public |
- * License along with this library in the file COPYING.LIB; |
- * if not, write to the Free Software Foundation, Inc., |
- * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA |
- */ |
- |
-#include "config.h" |
-#include "Threading.h" |
- |
-#if OS(WINDOWS) |
- |
-#include "DateMath.h" |
-#include "dtoa.h" |
-#include "dtoa/cached-powers.h" |
- |
-#include "MainThread.h" |
-#include "ThreadFunctionInvocation.h" |
-#include <windows.h> |
-#include <wtf/CurrentTime.h> |
-#include <wtf/HashMap.h> |
-#include <wtf/MathExtras.h> |
-#include <wtf/OwnPtr.h> |
-#include <wtf/PassOwnPtr.h> |
-#include <wtf/RandomNumberSeed.h> |
-#include <wtf/WTFThreadData.h> |
- |
-#if !USE(PTHREADS) && OS(WINDOWS) |
-#include "ThreadSpecific.h" |
-#endif |
- |
-#if !OS(WINCE) |
-#include <process.h> |
-#endif |
- |
-#if HAVE(ERRNO_H) |
-#include <errno.h> |
-#endif |
- |
-namespace WTF { |
- |
-// MS_VC_EXCEPTION, THREADNAME_INFO, and setThreadNameInternal all come from <http://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx>. |
-static const DWORD MS_VC_EXCEPTION = 0x406D1388; |
- |
-#pragma pack(push, 8) |
-typedef struct tagTHREADNAME_INFO { |
- DWORD dwType; // must be 0x1000 |
- LPCSTR szName; // pointer to name (in user addr space) |
- DWORD dwThreadID; // thread ID (-1=caller thread) |
- DWORD dwFlags; // reserved for future use, must be zero |
-} THREADNAME_INFO; |
-#pragma pack(pop) |
- |
-void initializeCurrentThreadInternal(const char* szThreadName) |
-{ |
-#if COMPILER(MINGW) |
- // FIXME: Implement thread name setting with MingW. |
- UNUSED_PARAM(szThreadName); |
-#else |
- THREADNAME_INFO info; |
- info.dwType = 0x1000; |
- info.szName = szThreadName; |
- info.dwThreadID = GetCurrentThreadId(); |
- info.dwFlags = 0; |
- |
- __try { |
- RaiseException(MS_VC_EXCEPTION, 0, sizeof(info)/sizeof(ULONG_PTR), reinterpret_cast<ULONG_PTR*>(&info)); |
- } __except (EXCEPTION_CONTINUE_EXECUTION) { |
- } |
-#endif |
-} |
- |
-static Mutex* atomicallyInitializedStaticMutex; |
- |
-void lockAtomicallyInitializedStaticMutex() |
-{ |
- ASSERT(atomicallyInitializedStaticMutex); |
- atomicallyInitializedStaticMutex->lock(); |
-} |
- |
-void unlockAtomicallyInitializedStaticMutex() |
-{ |
- atomicallyInitializedStaticMutex->unlock(); |
-} |
- |
-static Mutex& threadMapMutex() |
-{ |
- static Mutex mutex; |
- return mutex; |
-} |
- |
-void initializeThreading() |
-{ |
- if (atomicallyInitializedStaticMutex) |
- return; |
- |
- WTF::double_conversion::initialize(); |
- // StringImpl::empty() does not construct its static string in a threadsafe fashion, |
- // so ensure it has been initialized from here. |
- StringImpl::empty(); |
- atomicallyInitializedStaticMutex = new Mutex; |
- threadMapMutex(); |
- initializeRandomNumberGenerator(); |
- wtfThreadData(); |
- s_dtoaP5Mutex = new Mutex; |
- initializeDates(); |
-} |
- |
-static HashMap<DWORD, HANDLE>& threadMap() |
-{ |
- static HashMap<DWORD, HANDLE> map; |
- return map; |
-} |
- |
-static void storeThreadHandleByIdentifier(DWORD threadID, HANDLE threadHandle) |
-{ |
- MutexLocker locker(threadMapMutex()); |
- ASSERT(!threadMap().contains(threadID)); |
- threadMap().add(threadID, threadHandle); |
-} |
- |
-static HANDLE threadHandleForIdentifier(ThreadIdentifier id) |
-{ |
- MutexLocker locker(threadMapMutex()); |
- return threadMap().get(id); |
-} |
- |
-static void clearThreadHandleForIdentifier(ThreadIdentifier id) |
-{ |
- MutexLocker locker(threadMapMutex()); |
- ASSERT(threadMap().contains(id)); |
- threadMap().remove(id); |
-} |
- |
-static unsigned __stdcall wtfThreadEntryPoint(void* param) |
-{ |
- OwnPtr<ThreadFunctionInvocation> invocation = adoptPtr(static_cast<ThreadFunctionInvocation*>(param)); |
- invocation->function(invocation->data); |
- |
-#if !USE(PTHREADS) && OS(WINDOWS) |
- // Do the TLS cleanup. |
- ThreadSpecificThreadExit(); |
-#endif |
- |
- return 0; |
-} |
- |
-ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, const char* threadName) |
-{ |
- unsigned threadIdentifier = 0; |
- ThreadIdentifier threadID = 0; |
- OwnPtr<ThreadFunctionInvocation> invocation = adoptPtr(new ThreadFunctionInvocation(entryPoint, data)); |
-#if OS(WINCE) |
- // This is safe on WINCE, since CRT is in the core and innately multithreaded. |
- // On desktop Windows, need to use _beginthreadex (not available on WinCE) if using any CRT functions |
- HANDLE threadHandle = CreateThread(0, 0, (LPTHREAD_START_ROUTINE)wtfThreadEntryPoint, invocation.get(), 0, (LPDWORD)&threadIdentifier); |
-#else |
- HANDLE threadHandle = reinterpret_cast<HANDLE>(_beginthreadex(0, 0, wtfThreadEntryPoint, invocation.get(), 0, &threadIdentifier)); |
-#endif |
- if (!threadHandle) { |
-#if OS(WINCE) |
- LOG_ERROR("Failed to create thread at entry point %p with data %p: %ld", entryPoint, data, ::GetLastError()); |
-#elif !HAVE(ERRNO_H) |
- LOG_ERROR("Failed to create thread at entry point %p with data %p.", entryPoint, data); |
-#else |
- LOG_ERROR("Failed to create thread at entry point %p with data %p: %ld", entryPoint, data, errno); |
-#endif |
- return 0; |
- } |
- |
- // The thread will take ownership of invocation. |
- ThreadFunctionInvocation* leakedInvocation = invocation.leakPtr(); |
- UNUSED_PARAM(leakedInvocation); |
- |
- threadID = static_cast<ThreadIdentifier>(threadIdentifier); |
- storeThreadHandleByIdentifier(threadIdentifier, threadHandle); |
- |
- return threadID; |
-} |
- |
-int waitForThreadCompletion(ThreadIdentifier threadID) |
-{ |
- ASSERT(threadID); |
- |
- HANDLE threadHandle = threadHandleForIdentifier(threadID); |
- if (!threadHandle) |
- LOG_ERROR("ThreadIdentifier %u did not correspond to an active thread when trying to quit", threadID); |
- |
- DWORD joinResult = WaitForSingleObject(threadHandle, INFINITE); |
- if (joinResult == WAIT_FAILED) |
- LOG_ERROR("ThreadIdentifier %u was found to be deadlocked trying to quit", threadID); |
- |
- CloseHandle(threadHandle); |
- clearThreadHandleForIdentifier(threadID); |
- |
- return joinResult; |
-} |
- |
-void detachThread(ThreadIdentifier threadID) |
-{ |
- ASSERT(threadID); |
- |
- HANDLE threadHandle = threadHandleForIdentifier(threadID); |
- if (threadHandle) |
- CloseHandle(threadHandle); |
- clearThreadHandleForIdentifier(threadID); |
-} |
- |
-void yield() |
-{ |
- ::Sleep(1); |
-} |
- |
-ThreadIdentifier currentThread() |
-{ |
- return static_cast<ThreadIdentifier>(GetCurrentThreadId()); |
-} |
- |
-Mutex::Mutex() |
-{ |
- m_mutex.m_recursionCount = 0; |
- InitializeCriticalSection(&m_mutex.m_internalMutex); |
-} |
- |
-Mutex::~Mutex() |
-{ |
- DeleteCriticalSection(&m_mutex.m_internalMutex); |
-} |
- |
-void Mutex::lock() |
-{ |
- EnterCriticalSection(&m_mutex.m_internalMutex); |
- ++m_mutex.m_recursionCount; |
-} |
- |
-bool Mutex::tryLock() |
-{ |
- // This method is modeled after the behavior of pthread_mutex_trylock, |
- // which will return an error if the lock is already owned by the |
- // current thread. Since the primitive Win32 'TryEnterCriticalSection' |
- // treats this as a successful case, it changes the behavior of several |
- // tests in WebKit that check to see if the current thread already |
- // owned this mutex (see e.g., IconDatabase::getOrCreateIconRecord) |
- DWORD result = TryEnterCriticalSection(&m_mutex.m_internalMutex); |
- |
- if (result != 0) { // We got the lock |
- // If this thread already had the lock, we must unlock and |
- // return false so that we mimic the behavior of POSIX's |
- // pthread_mutex_trylock: |
- if (m_mutex.m_recursionCount > 0) { |
- LeaveCriticalSection(&m_mutex.m_internalMutex); |
- return false; |
- } |
- |
- ++m_mutex.m_recursionCount; |
- return true; |
- } |
- |
- return false; |
-} |
- |
-void Mutex::unlock() |
-{ |
- ASSERT(m_mutex.m_recursionCount); |
- --m_mutex.m_recursionCount; |
- LeaveCriticalSection(&m_mutex.m_internalMutex); |
-} |
- |
-bool PlatformCondition::timedWait(PlatformMutex& mutex, DWORD durationMilliseconds) |
-{ |
- // Enter the wait state. |
- DWORD res = WaitForSingleObject(m_blockLock, INFINITE); |
- ASSERT_UNUSED(res, res == WAIT_OBJECT_0); |
- ++m_waitersBlocked; |
- res = ReleaseSemaphore(m_blockLock, 1, 0); |
- ASSERT_UNUSED(res, res); |
- |
- --mutex.m_recursionCount; |
- LeaveCriticalSection(&mutex.m_internalMutex); |
- |
- // Main wait - use timeout. |
- bool timedOut = (WaitForSingleObject(m_blockQueue, durationMilliseconds) == WAIT_TIMEOUT); |
- |
- res = WaitForSingleObject(m_unblockLock, INFINITE); |
- ASSERT_UNUSED(res, res == WAIT_OBJECT_0); |
- |
- int signalsLeft = m_waitersToUnblock; |
- |
- if (m_waitersToUnblock) |
- --m_waitersToUnblock; |
- else if (++m_waitersGone == (INT_MAX / 2)) { // timeout/canceled or spurious semaphore |
- // timeout or spurious wakeup occured, normalize the m_waitersGone count |
- // this may occur if many calls to wait with a timeout are made and |
- // no call to notify_* is made |
- res = WaitForSingleObject(m_blockLock, INFINITE); |
- ASSERT_UNUSED(res, res == WAIT_OBJECT_0); |
- m_waitersBlocked -= m_waitersGone; |
- res = ReleaseSemaphore(m_blockLock, 1, 0); |
- ASSERT_UNUSED(res, res); |
- m_waitersGone = 0; |
- } |
- |
- res = ReleaseMutex(m_unblockLock); |
- ASSERT_UNUSED(res, res); |
- |
- if (signalsLeft == 1) { |
- res = ReleaseSemaphore(m_blockLock, 1, 0); // Open the gate. |
- ASSERT_UNUSED(res, res); |
- } |
- |
- EnterCriticalSection (&mutex.m_internalMutex); |
- ++mutex.m_recursionCount; |
- |
- return !timedOut; |
-} |
- |
-void PlatformCondition::signal(bool unblockAll) |
-{ |
- unsigned signalsToIssue = 0; |
- |
- DWORD res = WaitForSingleObject(m_unblockLock, INFINITE); |
- ASSERT_UNUSED(res, res == WAIT_OBJECT_0); |
- |
- if (m_waitersToUnblock) { // the gate is already closed |
- if (!m_waitersBlocked) { // no-op |
- res = ReleaseMutex(m_unblockLock); |
- ASSERT_UNUSED(res, res); |
- return; |
- } |
- |
- if (unblockAll) { |
- signalsToIssue = m_waitersBlocked; |
- m_waitersToUnblock += m_waitersBlocked; |
- m_waitersBlocked = 0; |
- } else { |
- signalsToIssue = 1; |
- ++m_waitersToUnblock; |
- --m_waitersBlocked; |
- } |
- } else if (m_waitersBlocked > m_waitersGone) { |
- res = WaitForSingleObject(m_blockLock, INFINITE); // Close the gate. |
- ASSERT_UNUSED(res, res == WAIT_OBJECT_0); |
- if (m_waitersGone != 0) { |
- m_waitersBlocked -= m_waitersGone; |
- m_waitersGone = 0; |
- } |
- if (unblockAll) { |
- signalsToIssue = m_waitersBlocked; |
- m_waitersToUnblock = m_waitersBlocked; |
- m_waitersBlocked = 0; |
- } else { |
- signalsToIssue = 1; |
- m_waitersToUnblock = 1; |
- --m_waitersBlocked; |
- } |
- } else { // No-op. |
- res = ReleaseMutex(m_unblockLock); |
- ASSERT_UNUSED(res, res); |
- return; |
- } |
- |
- res = ReleaseMutex(m_unblockLock); |
- ASSERT_UNUSED(res, res); |
- |
- if (signalsToIssue) { |
- res = ReleaseSemaphore(m_blockQueue, signalsToIssue, 0); |
- ASSERT_UNUSED(res, res); |
- } |
-} |
- |
-static const long MaxSemaphoreCount = static_cast<long>(~0UL >> 1); |
- |
-ThreadCondition::ThreadCondition() |
-{ |
- m_condition.m_waitersGone = 0; |
- m_condition.m_waitersBlocked = 0; |
- m_condition.m_waitersToUnblock = 0; |
- m_condition.m_blockLock = CreateSemaphore(0, 1, 1, 0); |
- m_condition.m_blockQueue = CreateSemaphore(0, 0, MaxSemaphoreCount, 0); |
- m_condition.m_unblockLock = CreateMutex(0, 0, 0); |
- |
- if (!m_condition.m_blockLock || !m_condition.m_blockQueue || !m_condition.m_unblockLock) { |
- if (m_condition.m_blockLock) |
- CloseHandle(m_condition.m_blockLock); |
- if (m_condition.m_blockQueue) |
- CloseHandle(m_condition.m_blockQueue); |
- if (m_condition.m_unblockLock) |
- CloseHandle(m_condition.m_unblockLock); |
- } |
-} |
- |
-ThreadCondition::~ThreadCondition() |
-{ |
- CloseHandle(m_condition.m_blockLock); |
- CloseHandle(m_condition.m_blockQueue); |
- CloseHandle(m_condition.m_unblockLock); |
-} |
- |
-void ThreadCondition::wait(Mutex& mutex) |
-{ |
- m_condition.timedWait(mutex.impl(), INFINITE); |
-} |
- |
-bool ThreadCondition::timedWait(Mutex& mutex, double absoluteTime) |
-{ |
- DWORD interval = absoluteTimeToWaitTimeoutInterval(absoluteTime); |
- |
- if (!interval) { |
- // Consider the wait to have timed out, even if our condition has already been signaled, to |
- // match the pthreads implementation. |
- return false; |
- } |
- |
- return m_condition.timedWait(mutex.impl(), interval); |
-} |
- |
-void ThreadCondition::signal() |
-{ |
- m_condition.signal(false); // Unblock only 1 thread. |
-} |
- |
-void ThreadCondition::broadcast() |
-{ |
- m_condition.signal(true); // Unblock all threads. |
-} |
- |
-DWORD absoluteTimeToWaitTimeoutInterval(double absoluteTime) |
-{ |
- double currentTime = WTF::currentTime(); |
- |
- // Time is in the past - return immediately. |
- if (absoluteTime < currentTime) |
- return 0; |
- |
- // Time is too far in the future (and would overflow unsigned long) - wait forever. |
- if (absoluteTime - currentTime > static_cast<double>(INT_MAX) / 1000.0) |
- return INFINITE; |
- |
- return static_cast<DWORD>((absoluteTime - currentTime) * 1000.0); |
-} |
- |
-} // namespace WTF |
- |
-#endif // OS(WINDOWS) |