jit/HostCallReturnValue.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 HostCallReturnValue_h
  27 #define HostCallReturnValue_h
  28
  29 #include "JSValue.h"
  30 #include "MacroAssemblerCodeRef.h"
  31 #include <wtf/Platform.h>
  32
  33 // Unfortunately this only works on GCC-like compilers. And it's currently only used
  34 // by LLInt and DFG, which also are restricted to GCC-like compilers. We should
  35 // probably fix that at some point.
  36 #if COMPILER(GCC)
  37
  38 #if CALLING_CONVENTION_IS_STDCALL
  39 #define HOST_CALL_RETURN_VALUE_OPTION CDECL
  40 #else
  41 #define HOST_CALL_RETURN_VALUE_OPTION
  42 #endif
  43
  44 namespace JSC {
  45
  46 extern "C" EncodedJSValue HOST_CALL_RETURN_VALUE_OPTION getHostCallReturnValue();
  47
  48 // This is a public declaration only to convince CLANG not to elide it.
  49 extern "C" EncodedJSValue HOST_CALL_RETURN_VALUE_OPTION getHostCallReturnValueWithExecState(ExecState*);
  50
  51 inline void initializeHostCallReturnValue()
  52 {
  53     getHostCallReturnValueWithExecState(0);
  54 }
  55
  56 }
  57
  58 #else // COMPILER(GCC)
  59
  60 namespace JSC {
  61 inline void initializeHostCallReturnValue() { }
  62 }
  63
  64 #endif // COMPILER(GCC)
  65
  66 #endif // HostCallReturnValue_h
  67