1/* 2 * Copyright (C) 2009 Apple Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY 14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR 17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26#ifndef APIShims_h 27#define APIShims_h 28 29#include "CallFrame.h" 30#include "GCActivityCallback.h" 31#include "JSLock.h" 32#include <wtf/WTFThreadData.h> 33 34namespace JSC { 35 36class APIEntryShimWithoutLock { 37protected: 38 APIEntryShimWithoutLock(JSGlobalData* globalData, bool registerThread) 39 : m_globalData(globalData) 40 , m_entryIdentifierTable(wtfThreadData().setCurrentIdentifierTable(globalData->identifierTable)) 41 { 42 UNUSED_PARAM(registerThread); 43#if ENABLE(JSC_MULTIPLE_THREADS) 44 if (registerThread) 45 globalData->heap.machineThreads().addCurrentThread(); 46#endif 47 m_globalData->heap.activityCallback()->synchronize(); 48 m_globalData->timeoutChecker.start(); 49 } 50 51 ~APIEntryShimWithoutLock() 52 { 53 m_globalData->timeoutChecker.stop(); 54 wtfThreadData().setCurrentIdentifierTable(m_entryIdentifierTable); 55 } 56 57private: 58 JSGlobalData* m_globalData; 59 IdentifierTable* m_entryIdentifierTable; 60}; 61 62class APIEntryShim : public APIEntryShimWithoutLock { 63public: 64 // Normal API entry 65 APIEntryShim(ExecState* exec, bool registerThread = true) 66 : APIEntryShimWithoutLock(&exec->globalData(), registerThread) 67 , m_lock(exec) 68 { 69 } 70 71 // JSPropertyNameAccumulator only has a globalData. 72 APIEntryShim(JSGlobalData* globalData, bool registerThread = true) 73 : APIEntryShimWithoutLock(globalData, registerThread) 74 , m_lock(globalData->isSharedInstance() ? LockForReal : SilenceAssertionsOnly) 75 { 76 } 77 78private: 79 JSLock m_lock; 80}; 81 82class APICallbackShim { 83public: 84 APICallbackShim(ExecState* exec) 85 : m_dropAllLocks(exec) 86 , m_globalData(&exec->globalData()) 87 { 88 wtfThreadData().resetCurrentIdentifierTable(); 89 } 90 91 ~APICallbackShim() 92 { 93 m_globalData->heap.activityCallback()->synchronize(); 94 wtfThreadData().setCurrentIdentifierTable(m_globalData->identifierTable); 95 } 96 97private: 98 JSLock::DropAllLocks m_dropAllLocks; 99 JSGlobalData* m_globalData; 100}; 101 102} 103 104#endif 105