bytecode/LLIntCallLinkInfo.h

   1 /*
   2  * Copyright (C) 2012 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 LLIntCallLinkInfo_h
  27 #define LLIntCallLinkInfo_h
  28
  29 #include "JSFunction.h"
  30 #include "MacroAssemblerCodeRef.h"
  31 #include <wtf/SentinelLinkedList.h>
  32
  33 namespace JSC {
  34
  35 struct Instruction;
  36
  37 struct LLIntCallLinkInfo : public BasicRawSentinelNode<LLIntCallLinkInfo> {
  38     LLIntCallLinkInfo()
  39     {
  40     }
  41
  42     ~LLIntCallLinkInfo()
  43     {
  44         if (isOnList())
  45             remove();
  46     }
  47
  48     bool isLinked() { return callee; }
  49
  50     void unlink()
  51     {
  52         callee.clear();
  53         machineCodeTarget = MacroAssemblerCodePtr();
  54         if (isOnList())
  55             remove();
  56     }
  57
  58     WriteBarrier<JSFunction> callee;
  59     WriteBarrier<JSFunction> lastSeenCallee;
  60     MacroAssemblerCodePtr machineCodeTarget;
  61 };
  62
  63 } // namespace JSC
  64
  65 #endif // LLIntCallLinkInfo_h
  66