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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef JSMainThreadExecState_h
#define JSMainThreadExecState_h
#include "InspectorInstrumentation.h"
#include "JSDOMBinding.h"
#include <runtime/Completion.h>
#include <runtime/Executable.h>
#ifndef NDEBUG
#include <wtf/MainThread.h>
#endif
namespace WebCore {
class Page;
class JSMainThreadExecState {
WTF_MAKE_NONCOPYABLE(JSMainThreadExecState);
public:
static JSC::ExecState* currentState()
{
ASSERT(isMainThread());
return s_mainThreadState;
};
static JSC::JSValue call(JSC::ExecState* exec, JSC::JSValue functionObject, JSC::CallType callType, const JSC::CallData& callData, JSC::JSValue thisValue, const JSC::ArgList& args)
{
JSMainThreadExecState currentState(exec);
// Ensure DOM global object is unwrapped to the shell.
if (thisValue.isObject())
thisValue = thisValue.toThisObject(exec);
return JSC::call(exec, functionObject, callType, callData, thisValue, args);
};
static JSC::JSValue instrumentedCall(Page* page, JSC::ExecState* exec, JSC::JSValue functionObject, JSC::CallType callType, const JSC::CallData& callData, JSC::JSValue thisValue, const JSC::ArgList& args)
{
InspectorInstrumentationCookie cookie;
if (InspectorInstrumentation::hasFrontends()) {
String resourceName;
int lineNumber = 1;
if (callType == JSC::CallTypeJS) {
resourceName = ustringToString(callData.js.functionExecutable->sourceURL());
lineNumber = callData.js.functionExecutable->lineNo();
} else
resourceName = "undefined";
cookie = InspectorInstrumentation::willCallFunction(page, resourceName, lineNumber);
}
JSC::JSValue value = call(exec, functionObject, callType, callData, thisValue, args);
InspectorInstrumentation::didCallFunction(cookie);
return value;
};
static JSC::JSValue evaluate(JSC::ExecState* exec, JSC::ScopeChainNode* chain, const JSC::SourceCode& source, JSC::JSValue thisValue, JSC::JSValue* exception)
{
JSMainThreadExecState currentState(exec);
return JSC::evaluate(exec, chain, source, thisValue, exception);
};
protected:
explicit JSMainThreadExecState(JSC::ExecState* exec)
: m_previousState(s_mainThreadState)
{
ASSERT(isMainThread());
s_mainThreadState = exec;
};
~JSMainThreadExecState()
{
ASSERT(isMainThread());
#if ENABLE(MUTATION_OBSERVERS)
bool didExitJavaScript = s_mainThreadState && !m_previousState;
#endif
s_mainThreadState = m_previousState;
#if ENABLE(MUTATION_OBSERVERS)
if (didExitJavaScript)
didLeaveScriptContext();
#endif
}
private:
static JSC::ExecState* s_mainThreadState;
JSC::ExecState* m_previousState;
#if ENABLE(MUTATION_OBSERVERS)
static void didLeaveScriptContext();
#endif
};
// Null state prevents origin security checks.
// Used by non-JavaScript bindings (ObjC, GObject).
class JSMainThreadNullState : private JSMainThreadExecState {
public:
explicit JSMainThreadNullState() : JSMainThreadExecState(0) {};
};
} // namespace WebCore
#endif // JSMainThreadExecState_h
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