1e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block/* 2e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * Copyright (C) 2010 Google Inc. All rights reserved. 3e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * 4e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * Redistribution and use in source and binary forms, with or without 5e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * modification, are permitted provided that the following conditions 6e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * are met: 7e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * 1. Redistributions of source code must retain the above copyright 8e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * notice, this list of conditions and the following disclaimer. 9e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * 2. Redistributions in binary form must reproduce the above copyright 10e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * notice, this list of conditions and the following disclaimer in the 11e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * documentation and/or other materials provided with the distribution. 12e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * 13e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' 14e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 15e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 16e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS 17e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 18e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 19e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 20e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 21e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 22e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 23e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block * THE POSSIBILITY OF SUCH DAMAGE. 24e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block */ 25e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block 26e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block#ifndef JSMainThreadExecState_h 27e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block#define JSMainThreadExecState_h 28e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block 292bde8e466a4451c7319e3a072d118917957d6554Steve Block#include "JSDOMBinding.h" 30e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block#ifndef NDEBUG 31e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block#include <wtf/MainThread.h> 32e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block#endif 33e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block 34e78cbe89e6f337f2f1fe40315be88f742b547151Steve Blocknamespace WebCore { 35e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block 36ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdochclass JSMainThreadExecState { 37ab9e7a118cf1ea2e3a93dce683b2ded3e7291ddbBen Murdoch WTF_MAKE_NONCOPYABLE(JSMainThreadExecState); 38e78cbe89e6f337f2f1fe40315be88f742b547151Steve Blockpublic: 39e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block static JSC::ExecState* currentState() 40e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block { 41e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block ASSERT(WTF::isMainThread()); 42e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block return s_mainThreadState; 43e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block }; 44e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block 45e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block static JSC::JSValue call(JSC::ExecState* exec, JSC::JSValue functionObject, JSC::CallType callType, const JSC::CallData& callData, JSC::JSValue thisValue, const JSC::ArgList& args) 46e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block { 47e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block JSMainThreadExecState currentState(exec); 48e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block return JSC::call(exec, functionObject, callType, callData, thisValue, args); 49e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block }; 50e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block 5181bc750723a18f21cd17d1b173cd2a4dda9cea6eBen Murdoch static JSC::Completion evaluate(JSC::ExecState* exec, JSC::ScopeChainNode* chain, const JSC::SourceCode& source, JSC::JSValue thisValue) 52e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block { 53e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block JSMainThreadExecState currentState(exec); 54e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block return JSC::evaluate(exec, chain, source, thisValue); 55e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block }; 56e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block 57e78cbe89e6f337f2f1fe40315be88f742b547151Steve Blockprotected: 58e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block explicit JSMainThreadExecState(JSC::ExecState* exec) 59e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block : m_previousState(s_mainThreadState) 60e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block { 61e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block ASSERT(WTF::isMainThread()); 62e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block s_mainThreadState = exec; 63e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block }; 64e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block 65e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block ~JSMainThreadExecState() 66e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block { 67e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block ASSERT(WTF::isMainThread()); 68e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block s_mainThreadState = m_previousState; 69e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block } 70e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block 71e78cbe89e6f337f2f1fe40315be88f742b547151Steve Blockprivate: 72e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block static JSC::ExecState* s_mainThreadState; 73e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block JSC::ExecState* m_previousState; 74e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block}; 75e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block 76e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block// Null state prevents origin security checks. 77e78cbe89e6f337f2f1fe40315be88f742b547151Steve Blockclass JSMainThreadNullState : private JSMainThreadExecState { 78e78cbe89e6f337f2f1fe40315be88f742b547151Steve Blockpublic: 79e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block explicit JSMainThreadNullState() : JSMainThreadExecState(0) {}; 80e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block}; 81e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block 82e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block} // namespace WebCore 83e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block 84e78cbe89e6f337f2f1fe40315be88f742b547151Steve Block#endif // JSMainThreadExecState_h 85