text: //-----------------------------------------------------------------------------
  // 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_GCC_H_
  #define _TORQUE_PLATFORM_PLATFORMINTRINSICS_GCC_H_
  
  /// @file
  /// Compiler intrinsics for GCC.
  
  #ifdef TORQUE_OS_MAC
  #include <libkern/OSAtomic.h>
  #elif defined(TORQUE_OS_PS3)
  #include <cell/atomic.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 )
  {
     #if defined(TORQUE_OS_PS3)
        cellAtomicAdd32( (std::uint32_t *)&ref, val );
     #elif !defined(TORQUE_OS_MAC)
        __sync_fetch_and_add( ( volatile long* ) &ref, val );
     #else
        OSAtomicAdd32( val, (int32_t* ) &ref);
     #endif
  }
  
  inline void dFetchAndAdd( volatile S32& ref, S32 val )
  {
     #if defined(TORQUE_OS_PS3)
        cellAtomicAdd32( (std::uint32_t *)&ref, val );
     #elif !defined(TORQUE_OS_MAC)
        __sync_fetch_and_add( ( volatile long* ) &ref, val );
     #else
        OSAtomicAdd32( val, (int32_t* ) &ref);
     #endif
  }
  
  // Compare-And-Swap
  
  inline bool dCompareAndSwap( volatile U32& ref, U32 oldVal, U32 newVal )
  {
     // bool
     //OSAtomicCompareAndSwap32(int32_t oldValue, int32_t newValue, volatile int32_t *theValue);
     #if defined(TORQUE_OS_PS3)
        return ( cellAtomicCompareAndSwap32( (std::uint32_t *)&ref, newVal, oldVal ) == oldVal );
     #elif !defined(TORQUE_OS_MAC)
        return ( __sync_val_compare_and_swap( ( volatile long* ) &ref, oldVal, newVal ) == oldVal );
     #else
        return OSAtomicCompareAndSwap32(oldVal, newVal, (int32_t *) &ref);
     #endif
  }
  
  inline bool dCompareAndSwap( volatile U64& ref, U64 oldVal, U64 newVal )
  {
     #if defined(TORQUE_OS_PS3)
        return ( cellAtomicCompareAndSwap32( (std::uint32_t *)&ref, newVal, oldVal ) == oldVal );
     #elif !defined(TORQUE_OS_MAC)
        return ( __sync_val_compare_and_swap( ( volatile long long* ) &ref, oldVal, newVal ) == oldVal );
     #else
        return OSAtomicCompareAndSwap64(oldVal, newVal, (int64_t *) &ref);
     #endif
  
  }
  
  /// Performs an atomic read operation.
  inline U32 dAtomicRead( volatile U32 &ref )
  {
     #if defined(TORQUE_OS_PS3)
        return cellAtomicAdd32( (std::uint32_t *)&ref, 0 );
     #elif !defined(TORQUE_OS_MAC)
        return __sync_fetch_and_add( ( volatile long* ) &ref, 0 );
     #else
        return OSAtomicAdd32( 0, (int32_t* ) &ref);
     #endif
  }
  
  #endif // _TORQUE_PLATFORM_PLATFORMINTRINSICS_GCC_H_
  