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/*
//
// Copyright 2010 SRI International
//
// This file is part of the Computational Morphometry Toolkit.
//
// http://www.nitrc.org/projects/cmtk/
//
// The Computational Morphometry Toolkit is free software: you can
// redistribute it and/or modify it under the terms of the GNU General Public
// License as published by the Free Software Foundation, either version 3 of
// the License, or (at your option) any later version.
//
// The Computational Morphometry Toolkit is distributed in the hope that it
// will be useful, but WITHOUT ANY WARRANTY; without even the implied
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with the Computational Morphometry Toolkit. If not, see
// <http://www.gnu.org/licenses/>.
//
// $Revision: 5436 $
//
// $LastChangedDate: 2018-12-10 19:01:20 -0800 (Mon, 10 Dec 2018) $
//
// $LastChangedBy: torstenrohlfing $
//
*/
#ifndef __cmtkDeviceMemoryCUDA_h_included_
#define __cmtkDeviceMemoryCUDA_h_included_
#include <cmtkconfig.h>
#include <System/cmtkCannotBeCopied.h>
#include <System/cmtkSmartConstPtr.h>
#include <System/cmtkSmartPtr.h>
#include <new>
namespace
cmtk
{
/** \addtogroup GPU */
//@{
/// Resource managing class for raw memory allocated on a GPU device through CUDA.
class DeviceMemoryCUDA
/// Make sure this is never copied.
: private CannotBeCopied
{
public:
/// This class.
typedef DeviceMemoryCUDA Self;
/// Smart pointer-to-const.
typedef SmartConstPointer<Self> SmartConstPtr;
/// Smart pointer.
typedef SmartPointer<Self> SmartPtr;
/// Exception for failed allocation.
class bad_alloc : public std::bad_alloc {};
/// Constructor: allocate memory through CUDA.
DeviceMemoryCUDA( const size_t nBytes /*!< Number of bytes to allocate */, const size_t padToMultiple = 1 /*!< Pad to allocate nearest multiple of this many bytes. */ );
/// Destructor: free memory through CUDA.
virtual ~DeviceMemoryCUDA();
/// Get number of bytes allocated on device.
size_t GetNumberOfBytesAllocated()
{
return this->m_NumberOfBytesAllocated;
}
protected:
/// Create new object and allocate memory.
Self::SmartPtr Alloc( const size_t nBytes, const size_t padToMultiple = 1 )
{
return Self::SmartPtr( new Self( nBytes, padToMultiple ) );
}
/// Copy from host to device memory.
void CopyToDevice( const void *const srcPtrHost, const size_t nBytes );
/// Copy from device to host memory.
void CopyToHost( void *const dstPtrHost, const size_t nBytes ) const;
/// Copy between two device memory locations.
void CopyOnDevice( const Self& srcPtrDevice, const size_t nBytes );
/// Copy between two device memory locations.
void Memset( const int value, const size_t nBytes );
/** Raw pointer to allocated device memory.
* Note that this is a device memory space pointer, which is not valid in
* host memory and can, therefore, not be dereferenced in host code.
*/
void* m_PointerDevice;
/// Total number of bytes allocated on device.
size_t m_NumberOfBytesAllocated;
};
//@}
} // namespace cmtk
#endif // #ifndef __cmtkDeviceMemoryCUDA_h_included_
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