15c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 25c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (C) 2007, 2008 Apple Inc. All rights reserved. 35c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (C) 2009 Google Inc. All rights reserved. 45c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright (C) 2009 Torch Mobile, Inc. All rights reserved. 55c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 65c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Redistribution and use in source and binary forms, with or without 75c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * modification, are permitted provided that the following conditions 85c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * are met: 95c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 1. Redistributions of source code must retain the above copyright 1102772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch * notice, this list of conditions and the following disclaimer. 125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 2. Redistributions in binary form must reproduce the above copyright 135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * notice, this list of conditions and the following disclaimer in the 1402772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch * documentation and/or other materials provided with the distribution. 155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of 165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * its contributors may be used to endorse or promote products derived 1702772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch * from this software without specific prior written permission. 185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY 205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY 235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES 245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 295c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 325c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * There are numerous academic and practical works on how to implement pthread_cond_wait/pthread_cond_signal/pthread_cond_broadcast 335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 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' 345c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * of modern attempts. There are several more or less proven implementations, one in Boost C++ library (http://www.boost.org) and another 355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * in pthreads-win32 (http://sourceware.org/pthreads-win32/). 365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * The number of articles and discussions is the evidence of significant difficulties in implementing these primitives correctly. 385c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * The brief search of revisions, ChangeLog entries, discussions in comp.programming.threads and other places clearly documents 395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * numerous pitfalls and performance problems the authors had to overcome to arrive to the suitable implementations. 405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Optimally, WebKit would use one of those supported/tested libraries directly. To roll out our own implementation is impractical, 415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * if even for the lack of sufficient testing. However, a faithful reproduction of the code from one of the popular supported 425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * libraries seems to be a good compromise. 435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 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) 455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 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). 465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Current Boost uses yet another (although seemingly equivalent) algorithm which came from their 'thread rewrite' effort. 475c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * This file includes timedWait/signal/broadcast implementations translated to WebKit coding style from the latest algorithm by 495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 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 505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * It replaces the implementation of their previous algorithm, also documented in the same source above. 515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * The naming and comments are left very close to original to enable easy cross-check. 525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * The corresponding Pthreads-win32 License is included below, and CONTRIBUTORS file which it refers to is added to 545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * source directory (as CONTRIBUTORS.pthreads-win32). 555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 565c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 575c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)/* 585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Pthreads-win32 - POSIX Threads Library for Win32 595c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright(C) 1998 John E. Bossom 605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Copyright(C) 1999,2005 Pthreads-win32 contributors 615c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Contact Email: rpj@callisto.canberra.edu.au 635c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 645c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * The current list of contributors is contained 655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * in the file CONTRIBUTORS included with the source 665c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * code distribution. The list can also be seen at the 675c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * following World Wide Web location: 685c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * http://sources.redhat.com/pthreads-win32/contributors.html 695c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 705c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * This library is free software; you can redistribute it and/or 715c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * modify it under the terms of the GNU Lesser General Public 725c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * License as published by the Free Software Foundation; either 735c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * version 2 of the License, or (at your option) any later version. 745c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 755c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * This library is distributed in the hope that it will be useful, 765c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * but WITHOUT ANY WARRANTY; without even the implied warranty of 775c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 785c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * Lesser General Public License for more details. 795c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 805c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * You should have received a copy of the GNU Lesser General Public 815c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * License along with this library in the file COPYING.LIB; 825c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * if not, write to the Free Software Foundation, Inc., 835c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA 845c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) */ 855c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 865c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "config.h" 875c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "Threading.h" 88926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles) 89926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles)#if OS(WINDOWS) 90926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles) 915c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "DateMath.h" 925c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "dtoa.h" 935c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "dtoa/cached-powers.h" 945c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 955c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "MainThread.h" 965c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include "ThreadFunctionInvocation.h" 97d24c94b5090b6aa121f0f82325c9379004dc3196Ben Murdoch#include "ThreadSpecific.h" 985c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include <windows.h> 99591b958dee2cf159d33a0b931e6231072eaf38d5Ben Murdoch#include "wtf/CurrentTime.h" 100591b958dee2cf159d33a0b931e6231072eaf38d5Ben Murdoch#include "wtf/HashMap.h" 101591b958dee2cf159d33a0b931e6231072eaf38d5Ben Murdoch#include "wtf/MathExtras.h" 102591b958dee2cf159d33a0b931e6231072eaf38d5Ben Murdoch#include "wtf/OwnPtr.h" 103591b958dee2cf159d33a0b931e6231072eaf38d5Ben Murdoch#include "wtf/PassOwnPtr.h" 104591b958dee2cf159d33a0b931e6231072eaf38d5Ben Murdoch#include "wtf/RandomNumberSeed.h" 105591b958dee2cf159d33a0b931e6231072eaf38d5Ben Murdoch#include "wtf/WTFThreadData.h" 1065c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1075c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#include <errno.h> 108f5e4ad553afbc08dd2e729bb77e937a9a94d5827Torne (Richard Coles)#include <process.h> 1095c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)namespace WTF { 1115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)// MS_VC_EXCEPTION, THREADNAME_INFO, and setThreadNameInternal all come from <http://msdn.microsoft.com/en-us/library/xcb2z8hs.aspx>. 1135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)static const DWORD MS_VC_EXCEPTION = 0x406D1388; 1145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#pragma pack(push, 8) 1165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)typedef struct tagTHREADNAME_INFO { 1175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) DWORD dwType; // must be 0x1000 1185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LPCSTR szName; // pointer to name (in user addr space) 1195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) DWORD dwThreadID; // thread ID (-1=caller thread) 1205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) DWORD dwFlags; // reserved for future use, must be zero 1215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} THREADNAME_INFO; 1225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)#pragma pack(pop) 1235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void initializeCurrentThreadInternal(const char* szThreadName) 1255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 1265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) THREADNAME_INFO info; 1275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) info.dwType = 0x1000; 1285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) info.szName = szThreadName; 1295c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) info.dwThreadID = GetCurrentThreadId(); 1305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) info.dwFlags = 0; 1315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1325c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) __try { 1335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) RaiseException(MS_VC_EXCEPTION, 0, sizeof(info)/sizeof(ULONG_PTR), reinterpret_cast<ULONG_PTR*>(&info)); 1345c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } __except (EXCEPTION_CONTINUE_EXECUTION) { 1355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 1365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 1375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1385c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)static Mutex* atomicallyInitializedStaticMutex; 1395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void lockAtomicallyInitializedStaticMutex() 1415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 1425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT(atomicallyInitializedStaticMutex); 1435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) atomicallyInitializedStaticMutex->lock(); 1445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 1455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void unlockAtomicallyInitializedStaticMutex() 1475c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 1485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) atomicallyInitializedStaticMutex->unlock(); 1495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 1505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)static Mutex& threadMapMutex() 1525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 1535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) static Mutex mutex; 1545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return mutex; 1555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 1565c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1575c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void initializeThreading() 1585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 15993ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) // This should only be called once. 16093ac45cfc74041c8ae536ce58a9534d46db2024eTorne (Richard Coles) ASSERT(!atomicallyInitializedStaticMutex); 1615c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) WTF::double_conversion::initialize(); 1635c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // StringImpl::empty() does not construct its static string in a threadsafe fashion, 1645c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // so ensure it has been initialized from here. 1655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) StringImpl::empty(); 1665c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) atomicallyInitializedStaticMutex = new Mutex; 1675c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) threadMapMutex(); 1685c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) initializeRandomNumberGenerator(); 1695c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) wtfThreadData(); 1705c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) s_dtoaP5Mutex = new Mutex; 1715c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) initializeDates(); 1725c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 1735c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1745c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)static HashMap<DWORD, HANDLE>& threadMap() 1755c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 1765c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) static HashMap<DWORD, HANDLE> map; 1775c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return map; 1785c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 1795c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1805c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)static void storeThreadHandleByIdentifier(DWORD threadID, HANDLE threadHandle) 1815c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 1825c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) MutexLocker locker(threadMapMutex()); 1835c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT(!threadMap().contains(threadID)); 1845c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) threadMap().add(threadID, threadHandle); 1855c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 1865c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1875c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)static HANDLE threadHandleForIdentifier(ThreadIdentifier id) 1885c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 1895c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) MutexLocker locker(threadMapMutex()); 1905c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return threadMap().get(id); 1915c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 1925c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 1935c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)static void clearThreadHandleForIdentifier(ThreadIdentifier id) 1945c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 1955c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) MutexLocker locker(threadMapMutex()); 1965c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT(threadMap().contains(id)); 1975c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) threadMap().remove(id); 1985c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 1995c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2005c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)static unsigned __stdcall wtfThreadEntryPoint(void* param) 2015c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 2025c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) OwnPtr<ThreadFunctionInvocation> invocation = adoptPtr(static_cast<ThreadFunctionInvocation*>(param)); 2035c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) invocation->function(invocation->data); 2045c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2055c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Do the TLS cleanup. 2065c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ThreadSpecificThreadExit(); 2075c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2085c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return 0; 2095c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 2105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)ThreadIdentifier createThreadInternal(ThreadFunction entryPoint, void* data, const char* threadName) 2125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 2135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) unsigned threadIdentifier = 0; 2145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ThreadIdentifier threadID = 0; 2155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) OwnPtr<ThreadFunctionInvocation> invocation = adoptPtr(new ThreadFunctionInvocation(entryPoint, data)); 2165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) HANDLE threadHandle = reinterpret_cast<HANDLE>(_beginthreadex(0, 0, wtfThreadEntryPoint, invocation.get(), 0, &threadIdentifier)); 2175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (!threadHandle) { 2185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LOG_ERROR("Failed to create thread at entry point %p with data %p: %ld", entryPoint, data, errno); 2195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return 0; 2205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 2215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // The thread will take ownership of invocation. 2235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ThreadFunctionInvocation* leakedInvocation = invocation.leakPtr(); 2245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) UNUSED_PARAM(leakedInvocation); 2255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) threadID = static_cast<ThreadIdentifier>(threadIdentifier); 2275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) storeThreadHandleByIdentifier(threadIdentifier, threadHandle); 2285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2295c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return threadID; 2305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 2315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2325c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)int waitForThreadCompletion(ThreadIdentifier threadID) 2335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 2345c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT(threadID); 23502772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch 2365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) HANDLE threadHandle = threadHandleForIdentifier(threadID); 2375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (!threadHandle) 2385c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LOG_ERROR("ThreadIdentifier %u did not correspond to an active thread when trying to quit", threadID); 23902772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch 2405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) DWORD joinResult = WaitForSingleObject(threadHandle, INFINITE); 2415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (joinResult == WAIT_FAILED) 2425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LOG_ERROR("ThreadIdentifier %u was found to be deadlocked trying to quit", threadID); 2435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) CloseHandle(threadHandle); 2455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) clearThreadHandleForIdentifier(threadID); 2465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2475c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return joinResult; 2485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 2495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void detachThread(ThreadIdentifier threadID) 2515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 2525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT(threadID); 2535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) HANDLE threadHandle = threadHandleForIdentifier(threadID); 2555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (threadHandle) 2565c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) CloseHandle(threadHandle); 2575c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) clearThreadHandleForIdentifier(threadID); 2585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 2595c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void yield() 2615c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 2625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ::Sleep(1); 2635c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 2645c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)ThreadIdentifier currentThread() 2665c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 2675c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return static_cast<ThreadIdentifier>(GetCurrentThreadId()); 2685c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 2695c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2705c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)Mutex::Mutex() 2715c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 2725c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_mutex.m_recursionCount = 0; 2735c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) InitializeCriticalSection(&m_mutex.m_internalMutex); 2745c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 2755c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2765c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)Mutex::~Mutex() 2775c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 2785c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) DeleteCriticalSection(&m_mutex.m_internalMutex); 2795c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 2805c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 2815c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void Mutex::lock() 2825c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 2835c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) EnterCriticalSection(&m_mutex.m_internalMutex); 2845c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ++m_mutex.m_recursionCount; 2855c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 28602772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch 2875c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)bool Mutex::tryLock() 2885c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 2895c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // This method is modeled after the behavior of pthread_mutex_trylock, 2905c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // which will return an error if the lock is already owned by the 2915c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // current thread. Since the primitive Win32 'TryEnterCriticalSection' 2925c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // treats this as a successful case, it changes the behavior of several 2935c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // tests in WebKit that check to see if the current thread already 2945c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // owned this mutex (see e.g., IconDatabase::getOrCreateIconRecord) 2955c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) DWORD result = TryEnterCriticalSection(&m_mutex.m_internalMutex); 29602772c6a72f1ee0b226341a4f4439970c29fc861Ben Murdoch 2975c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (result != 0) { // We got the lock 2985c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // If this thread already had the lock, we must unlock and 2995c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // return false so that we mimic the behavior of POSIX's 3005c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // pthread_mutex_trylock: 3015c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (m_mutex.m_recursionCount > 0) { 3025c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LeaveCriticalSection(&m_mutex.m_internalMutex); 3035c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return false; 3045c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 3055c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3065c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ++m_mutex.m_recursionCount; 3075c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return true; 3085c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 3095c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return false; 3115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 3125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void Mutex::unlock() 3145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 3155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT(m_mutex.m_recursionCount); 3165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) --m_mutex.m_recursionCount; 3175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LeaveCriticalSection(&m_mutex.m_internalMutex); 3185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 3195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)bool PlatformCondition::timedWait(PlatformMutex& mutex, DWORD durationMilliseconds) 3215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 3225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Enter the wait state. 3235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) DWORD res = WaitForSingleObject(m_blockLock, INFINITE); 3245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_UNUSED(res, res == WAIT_OBJECT_0); 3255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ++m_waitersBlocked; 3265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) res = ReleaseSemaphore(m_blockLock, 1, 0); 3275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_UNUSED(res, res); 3285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3295c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) --mutex.m_recursionCount; 3305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) LeaveCriticalSection(&mutex.m_internalMutex); 3315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3325c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Main wait - use timeout. 3335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) bool timedOut = (WaitForSingleObject(m_blockQueue, durationMilliseconds) == WAIT_TIMEOUT); 3345c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) res = WaitForSingleObject(m_unblockLock, INFINITE); 3365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_UNUSED(res, res == WAIT_OBJECT_0); 3375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3385c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) int signalsLeft = m_waitersToUnblock; 3395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (m_waitersToUnblock) 3415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) --m_waitersToUnblock; 3425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) else if (++m_waitersGone == (INT_MAX / 2)) { // timeout/canceled or spurious semaphore 3435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // timeout or spurious wakeup occured, normalize the m_waitersGone count 3445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // this may occur if many calls to wait with a timeout are made and 3455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // no call to notify_* is made 3465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) res = WaitForSingleObject(m_blockLock, INFINITE); 3475c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_UNUSED(res, res == WAIT_OBJECT_0); 3485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_waitersBlocked -= m_waitersGone; 3495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) res = ReleaseSemaphore(m_blockLock, 1, 0); 3505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_UNUSED(res, res); 3515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_waitersGone = 0; 3525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 3535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) res = ReleaseMutex(m_unblockLock); 3555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_UNUSED(res, res); 3565c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3575c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (signalsLeft == 1) { 3585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) res = ReleaseSemaphore(m_blockLock, 1, 0); // Open the gate. 3595c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_UNUSED(res, res); 3605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 3615c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) EnterCriticalSection (&mutex.m_internalMutex); 3635c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ++mutex.m_recursionCount; 3645c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return !timedOut; 3665c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 3675c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3685c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void PlatformCondition::signal(bool unblockAll) 3695c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 3705c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) unsigned signalsToIssue = 0; 3715c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3725c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) DWORD res = WaitForSingleObject(m_unblockLock, INFINITE); 3735c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_UNUSED(res, res == WAIT_OBJECT_0); 3745c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3755c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (m_waitersToUnblock) { // the gate is already closed 3765c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (!m_waitersBlocked) { // no-op 3775c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) res = ReleaseMutex(m_unblockLock); 3785c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_UNUSED(res, res); 3795c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return; 3805c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 3815c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 3825c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (unblockAll) { 3835c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) signalsToIssue = m_waitersBlocked; 3845c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_waitersToUnblock += m_waitersBlocked; 3855c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_waitersBlocked = 0; 3865c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } else { 3875c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) signalsToIssue = 1; 3885c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ++m_waitersToUnblock; 3895c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) --m_waitersBlocked; 3905c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 3915c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } else if (m_waitersBlocked > m_waitersGone) { 3925c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) res = WaitForSingleObject(m_blockLock, INFINITE); // Close the gate. 3935c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_UNUSED(res, res == WAIT_OBJECT_0); 3945c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (m_waitersGone != 0) { 3955c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_waitersBlocked -= m_waitersGone; 3965c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_waitersGone = 0; 3975c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 3985c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (unblockAll) { 3995c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) signalsToIssue = m_waitersBlocked; 4005c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_waitersToUnblock = m_waitersBlocked; 4015c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_waitersBlocked = 0; 4025c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } else { 4035c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) signalsToIssue = 1; 4045c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_waitersToUnblock = 1; 4055c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) --m_waitersBlocked; 4065c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 4075c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } else { // No-op. 4085c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) res = ReleaseMutex(m_unblockLock); 4095c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_UNUSED(res, res); 4105c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return; 4115c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 4125c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4135c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) res = ReleaseMutex(m_unblockLock); 4145c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_UNUSED(res, res); 4155c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4165c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (signalsToIssue) { 4175c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) res = ReleaseSemaphore(m_blockQueue, signalsToIssue, 0); 4185c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) ASSERT_UNUSED(res, res); 4195c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 4205c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 4215c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4225c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)static const long MaxSemaphoreCount = static_cast<long>(~0UL >> 1); 4235c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4245c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)ThreadCondition::ThreadCondition() 4255c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 4265c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_condition.m_waitersGone = 0; 4275c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_condition.m_waitersBlocked = 0; 4285c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_condition.m_waitersToUnblock = 0; 4295c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_condition.m_blockLock = CreateSemaphore(0, 1, 1, 0); 4305c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_condition.m_blockQueue = CreateSemaphore(0, 0, MaxSemaphoreCount, 0); 4315c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_condition.m_unblockLock = CreateMutex(0, 0, 0); 4325c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4335c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (!m_condition.m_blockLock || !m_condition.m_blockQueue || !m_condition.m_unblockLock) { 4345c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (m_condition.m_blockLock) 4355c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) CloseHandle(m_condition.m_blockLock); 4365c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (m_condition.m_blockQueue) 4375c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) CloseHandle(m_condition.m_blockQueue); 4385c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (m_condition.m_unblockLock) 4395c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) CloseHandle(m_condition.m_unblockLock); 4405c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 4415c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 4425c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4435c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)ThreadCondition::~ThreadCondition() 4445c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 4455c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) CloseHandle(m_condition.m_blockLock); 4465c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) CloseHandle(m_condition.m_blockQueue); 4475c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) CloseHandle(m_condition.m_unblockLock); 4485c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 4495c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4505c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void ThreadCondition::wait(Mutex& mutex) 4515c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 4525c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_condition.timedWait(mutex.impl(), INFINITE); 4535c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 4545c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4555c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)bool ThreadCondition::timedWait(Mutex& mutex, double absoluteTime) 4565c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 4575c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) DWORD interval = absoluteTimeToWaitTimeoutInterval(absoluteTime); 4585c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4595c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (!interval) { 4605c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Consider the wait to have timed out, even if our condition has already been signaled, to 4615c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // match the pthreads implementation. 4625c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return false; 4635c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) } 4645c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4655c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return m_condition.timedWait(mutex.impl(), interval); 4665c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 4675c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4685c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void ThreadCondition::signal() 4695c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 4705c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_condition.signal(false); // Unblock only 1 thread. 4715c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 4725c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4735c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)void ThreadCondition::broadcast() 4745c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 4755c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) m_condition.signal(true); // Unblock all threads. 4765c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 4775c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4785c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)DWORD absoluteTimeToWaitTimeoutInterval(double absoluteTime) 4795c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles){ 4805c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) double currentTime = WTF::currentTime(); 4815c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4825c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Time is in the past - return immediately. 4835c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (absoluteTime < currentTime) 4845c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return 0; 4855c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4865c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) // Time is too far in the future (and would overflow unsigned long) - wait forever. 4875c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) if (absoluteTime - currentTime > static_cast<double>(INT_MAX) / 1000.0) 4885c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return INFINITE; 4895c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4905c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) return static_cast<DWORD>((absoluteTime - currentTime) * 1000.0); 4915c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} 4925c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles) 4935c87bf8b86a7c82ef50fb7a89697d8e02e2553beTorne (Richard Coles)} // namespace WTF 494926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles) 495926b001d589ce2f10facb93dd4b87578ea35a855Torne (Richard Coles)#endif // OS(WINDOWS) 496