device_selector.hpp

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//==------ device_selector.hpp - SYCL device selector ---------*- C++ --*---==//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
 
#pragma once
 
#include <CL/sycl/detail/defines.hpp>
#include <CL/sycl/detail/export.hpp>
 
// 4.6.1 Device selection class
 
__SYCL_INLINE_NAMESPACE(cl) {
namespace sycl {
 
// Forward declarations
class device;
 
class __SYCL_EXPORT device_selector {
protected:
  // SYCL 1.2.1 defines a negative score to reject a device from selection
  static constexpr int REJECT_DEVICE_SCORE = -1;
 
public:
  virtual ~device_selector() = default;
 
  virtual device select_device() const;
 
  virtual int operator()(const device &device) const = 0;
};
 
class __SYCL_EXPORT default_selector : public device_selector {
public:
  int operator()(const device &dev) const override;
};
 
class __SYCL_EXPORT gpu_selector : public device_selector {
public:
  int operator()(const device &dev) const override;
};
 
class __SYCL_EXPORT cpu_selector : public device_selector {
public:
  int operator()(const device &dev) const override;
};
 
class __SYCL_EXPORT accelerator_selector : public device_selector {
public:
  int operator()(const device &dev) const override;
};
 
class __SYCL_EXPORT host_selector : public device_selector {
public:
  int operator()(const device &dev) const override;
};
} // namespace sycl
} // __SYCL_INLINE_NAMESPACE(cl)