//
// Copyright (c) Microsoft. All rights reserved.
// Licensed under the MIT license. See LICENSE.md file in the project root for full license information.
//

#pragma once

// #define CPUONLY      // #define this to build without GPU support nor needing the SDK installed
#include "CommonMatrix.h"

// define IConfigRecord and ConfigParameters as incomplete types, in order to avoid having to include "ScriptableObjects.h" and "Config.h", as that confuses some .CU code
namespace Microsoft { namespace MSR { namespace ScriptableObjects { struct IConfigRecord; }}}

namespace Microsoft { namespace MSR { namespace CNTK {

#ifndef CPUONLY
class ConfigParameters;
DEVICEID_TYPE DeviceFromConfig(const ConfigParameters& config);
DEVICEID_TYPE DeviceFromConfig(const ScriptableObjects::IConfigRecord& config);
#else
template <class ConfigRecordType>
static inline DEVICEID_TYPE DeviceFromConfig(const ConfigRecordType& /*config*/)
{
    return -1 /*CPUDEVICE*/;
} // tells runtime system to not try to use GPUs
// TODO: find a way to use CPUDEVICE without a huge include overhead; OK so far since CPUONLY mode is sorta special...
#endif

} } }