1 /* 2 * Copyright (C) 2010 Google 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 INC. AND ITS CONTRIBUTORS ``AS IS'' 14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23 * THE POSSIBILITY OF SUCH DAMAGE. 24 */ 25 26 #ifndef JSMainThreadExecState_h 27 #define JSMainThreadExecState_h 28 29 #include "JSDOMBinding.h" 30 #ifndef NDEBUG 31 #include <wtf/MainThread.h> 32 #endif 33 34 namespace WebCore { 35 36 class JSMainThreadExecState { 37 WTF_MAKE_NONCOPYABLE(JSMainThreadExecState); 38 public: currentState()39 static JSC::ExecState* currentState() 40 { 41 ASSERT(WTF::isMainThread()); 42 return s_mainThreadState; 43 }; 44 call(JSC::ExecState * exec,JSC::JSValue functionObject,JSC::CallType callType,const JSC::CallData & callData,JSC::JSValue thisValue,const JSC::ArgList & args)45 static JSC::JSValue call(JSC::ExecState* exec, JSC::JSValue functionObject, JSC::CallType callType, const JSC::CallData& callData, JSC::JSValue thisValue, const JSC::ArgList& args) 46 { 47 JSMainThreadExecState currentState(exec); 48 return JSC::call(exec, functionObject, callType, callData, thisValue, args); 49 }; 50 evaluate(JSC::ExecState * exec,JSC::ScopeChainNode * chain,const JSC::SourceCode & source,JSC::JSValue thisValue)51 static JSC::Completion evaluate(JSC::ExecState* exec, JSC::ScopeChainNode* chain, const JSC::SourceCode& source, JSC::JSValue thisValue) 52 { 53 JSMainThreadExecState currentState(exec); 54 return JSC::evaluate(exec, chain, source, thisValue); 55 }; 56 57 protected: JSMainThreadExecState(JSC::ExecState * exec)58 explicit JSMainThreadExecState(JSC::ExecState* exec) 59 : m_previousState(s_mainThreadState) 60 { 61 ASSERT(WTF::isMainThread()); 62 s_mainThreadState = exec; 63 }; 64 ~JSMainThreadExecState()65 ~JSMainThreadExecState() 66 { 67 ASSERT(WTF::isMainThread()); 68 s_mainThreadState = m_previousState; 69 } 70 71 private: 72 static JSC::ExecState* s_mainThreadState; 73 JSC::ExecState* m_previousState; 74 }; 75 76 // Null state prevents origin security checks. 77 class JSMainThreadNullState : private JSMainThreadExecState { 78 public: JSMainThreadNullState()79 explicit JSMainThreadNullState() : JSMainThreadExecState(0) {}; 80 }; 81 82 } // namespace WebCore 83 84 #endif // JSMainThreadExecState_h 85