Engine directory for ticket #1

Engine/source/platform/platformIntrinsics.visualc.h

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+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#ifndef _TORQUE_PLATFORM_PLATFORMINTRINSICS_VISUALC_H_
+#define _TORQUE_PLATFORM_PLATFORMINTRINSICS_VISUALC_H_
+
+/// @file
+/// Compiler intrinsics for Visual C++.
+
+#if defined(TORQUE_OS_XENON)
+#  include <Xtl.h>
+#  define _InterlockedExchangeAdd InterlockedExchangeAdd
+#  define _InterlockedExchangeAdd64 InterlockedExchangeAdd64
+#else
+#	include <intrin.h>
+#endif
+
+// Fetch-And-Add
+//
+// NOTE: These do not return the pre-add value because
+// not all platforms (damn you OSX) can do that.
+//
+inline void dFetchAndAdd( volatile U32& ref, U32 val )
+{  
+   _InterlockedExchangeAdd( ( volatile long* ) &ref, val );
+}
+inline void dFetchAndAdd( volatile S32& ref, S32 val )
+{
+   _InterlockedExchangeAdd( ( volatile long* ) &ref, val );
+}
+
+#if defined(TORQUE_OS_XENON)
+// Not available on x86
+inline void dFetchAndAdd( volatile U64& ref, U64 val )
+{
+   _InterlockedExchangeAdd64( ( volatile __int64* ) &ref, val );
+}
+#endif
+
+// Compare-And-Swap
+
+inline bool dCompareAndSwap( volatile U32& ref, U32 oldVal, U32 newVal )
+{
+   return ( _InterlockedCompareExchange( ( volatile long* ) &ref, newVal, oldVal ) == oldVal );
+}
+inline bool dCompareAndSwap( volatile U64& ref, U64 oldVal, U64 newVal )
+{
+   return ( _InterlockedCompareExchange64( ( volatile __int64* ) &ref, newVal, oldVal ) == oldVal );
+}
+
+/// Performs an atomic read operation.
+inline U32 dAtomicRead( volatile U32 &ref )
+{
+   return _InterlockedExchangeAdd( ( volatile long* )&ref, 0 );
+}
+
+#endif // _TORQUE_PLATFORM_PLATFORMINTRINSICS_VISUALC_H_