JavaScriptCore-1097.3.tar.gz

[apple/javascriptcore.git] / jit / HostCallReturnValue.h

diff --git a/jit/HostCallReturnValue.h b/jit/HostCallReturnValue.h
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+/*
+ * Copyright (C) 2012 Apple 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. ``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
+ * 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 HostCallReturnValue_h
+#define HostCallReturnValue_h
+
+#include "JSValue.h"
+#include "MacroAssemblerCodeRef.h"
+#include <wtf/Platform.h>
+
+// Unfortunately this only works on GCC-like compilers. And it's currently only used
+// by LLInt and DFG, which also are restricted to GCC-like compilers. We should
+// probably fix that at some point.
+#if COMPILER(GCC)
+
+#if CALLING_CONVENTION_IS_STDCALL
+#define HOST_CALL_RETURN_VALUE_OPTION CDECL
+#else
+#define HOST_CALL_RETURN_VALUE_OPTION
+#endif
+
+namespace JSC {
+
+extern "C" EncodedJSValue HOST_CALL_RETURN_VALUE_OPTION getHostCallReturnValue();
+
+// This is a public declaration only to convince CLANG not to elide it.
+extern "C" EncodedJSValue HOST_CALL_RETURN_VALUE_OPTION getHostCallReturnValueWithExecState(ExecState*);
+
+inline void initializeHostCallReturnValue()
+{
+    getHostCallReturnValueWithExecState(0);
+}
+
+}
+
+#else // COMPILER(GCC)
+
+namespace JSC {
+inline void initializeHostCallReturnValue() { }
+}
+
+#endif // COMPILER(GCC)
+
+#endif // HostCallReturnValue_h
+