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 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 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 CachedCall_h
27#define CachedCall_h
28
29#include "CallFrameClosure.h"
30#include "JSFunction.h"
31#include "JSGlobalObject.h"
32#include "Interpreter.h"
33
34namespace JSC {
35    class CachedCall {
36        WTF_MAKE_NONCOPYABLE(CachedCall); WTF_MAKE_FAST_ALLOCATED;
37    public:
38        CachedCall(CallFrame* callFrame, JSFunction* function, int argCount)
39            : m_valid(false)
40            , m_interpreter(callFrame->interpreter())
41            , m_globalObjectScope(callFrame->globalData(), function->scope()->globalObject.get())
42        {
43            ASSERT(!function->isHostFunction());
44            m_closure = m_interpreter->prepareForRepeatCall(function->jsExecutable(), callFrame, function, argCount, function->scope());
45            m_valid = !callFrame->hadException();
46        }
47
48        JSValue call()
49        {
50            ASSERT(m_valid);
51            return m_interpreter->execute(m_closure);
52        }
53        void setThis(JSValue v) { m_closure.setArgument(0, v); }
54        void setArgument(int n, JSValue v) { m_closure.setArgument(n + 1, v); }
55
56        CallFrame* newCallFrame(ExecState* exec)
57        {
58            CallFrame* callFrame = m_closure.newCallFrame;
59            callFrame->setScopeChain(exec->scopeChain());
60            return callFrame;
61        }
62
63        ~CachedCall()
64        {
65            if (m_valid)
66                m_interpreter->endRepeatCall(m_closure);
67        }
68
69    private:
70        bool m_valid;
71        Interpreter* m_interpreter;
72        DynamicGlobalObjectScope m_globalObjectScope;
73        CallFrameClosure m_closure;
74    };
75}
76
77#endif
78