hamr_cuda_device.h

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#ifndef hamr_cuda_device_h
#define hamr_cuda_device_h
 
#include "hamr_config.h"
 
///@file
 
namespace hamr
{
/// gets the device identifier for the first GPU. @returns zero if successful.
inline int HAMR_EXPORT get_cuda_device_identifier(int &dev_id) { dev_id = 0; return 0; }
 
/// gets the device identifier for the CPU. @returns zero if successful.
inline int HAMR_EXPORT get_cuda_cpu_identifier(int &dev_id) { dev_id = -1; return 0; }
 
/// gets the currently atcive CUDA device. @returns zero if successful.
int HAMR_EXPORT get_active_cuda_device(int &dev_id);
 
/// sets the active CUDA device. returns zero if successful.
int HAMR_EXPORT set_active_cuda_device(int dev_id);
 
/// gets the device that owns the given pointer. @returns zero if successful.
int HAMR_EXPORT get_cuda_device(const void *ptr, int &device_id);
 
/** Activate the specified CUDA device, and restore the previously active
 * device when the object is destroyed.
 */
class HAMR_EXPORT activate_cuda_device
{
public:
    activate_cuda_device() = delete;
    activate_cuda_device(const activate_cuda_device &) = delete;
    void operator=(const activate_cuda_device &) = delete;
 
    activate_cuda_device(int id);
    ~activate_cuda_device();
 
private:
    int m_device;
};
 
}
#endif