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 

    34 namespace JSC {

    35     class CachedCall : public Noncopyable {

    36     public:

    37         CachedCall(CallFrame* callFrame, JSFunction* function, int argCount, JSValue* exception)

    38             : m_valid(false)

    39             , m_interpreter(callFrame->interpreter())

    40             , m_exception(exception)

    41             , m_globalObjectScope(callFrame, function->scope().globalObject())

    42         {

    43             ASSERT(!function->isHostFunction());

    44             m_closure = m_interpreter->prepareForRepeatCall(function->jsExecutable(), callFrame, function, argCount, function->scope().node(), exception);

    45             m_valid = !*exception;

    46         }

    47         

    48         JSValue call()

    49         { 

    50             ASSERT(m_valid);

    51             return m_interpreter->execute(m_closure, m_exception);

    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         JSValue* m_exception;

    73         DynamicGlobalObjectScope m_globalObjectScope;

    74         CallFrameClosure m_closure;

    75     };

    76 }

    77 

    78 #endif