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 "JSLock.h" 31 32 namespace JSC { 33 34 class APIEntryShimWithoutLock { 35 protected: APIEntryShimWithoutLock(JSGlobalData * globalData,bool registerThread)36 APIEntryShimWithoutLock(JSGlobalData* globalData, bool registerThread) 37 : m_globalData(globalData) 38 , m_entryIdentifierTable(setCurrentIdentifierTable(globalData->identifierTable)) 39 { 40 if (registerThread) 41 globalData->heap.registerThread(); 42 m_globalData->timeoutChecker.start(); 43 } 44 ~APIEntryShimWithoutLock()45 ~APIEntryShimWithoutLock() 46 { 47 m_globalData->timeoutChecker.stop(); 48 setCurrentIdentifierTable(m_entryIdentifierTable); 49 } 50 51 private: 52 JSGlobalData* m_globalData; 53 IdentifierTable* m_entryIdentifierTable; 54 }; 55 56 class APIEntryShim : public APIEntryShimWithoutLock { 57 public: 58 // Normal API entry 59 APIEntryShim(ExecState* exec, bool registerThread = true) 60 : APIEntryShimWithoutLock(&exec->globalData(), registerThread) 61 , m_lock(exec) 62 { 63 } 64 65 // JSPropertyNameAccumulator only has a globalData. 66 APIEntryShim(JSGlobalData* globalData, bool registerThread = true) APIEntryShimWithoutLock(globalData,registerThread)67 : APIEntryShimWithoutLock(globalData, registerThread) 68 , m_lock(globalData->isSharedInstance ? LockForReal : SilenceAssertionsOnly) 69 { 70 } 71 72 private: 73 JSLock m_lock; 74 }; 75 76 class APICallbackShim { 77 public: APICallbackShim(ExecState * exec)78 APICallbackShim(ExecState* exec) 79 : m_dropAllLocks(exec) 80 , m_globalData(&exec->globalData()) 81 { 82 resetCurrentIdentifierTable(); 83 m_globalData->timeoutChecker.start(); 84 } 85 ~APICallbackShim()86 ~APICallbackShim() 87 { 88 m_globalData->timeoutChecker.stop(); 89 setCurrentIdentifierTable(m_globalData->identifierTable); 90 } 91 92 private: 93 JSLock::DropAllLocks m_dropAllLocks; 94 JSGlobalData* m_globalData; 95 }; 96 97 } 98 99 #endif 100