// Copyright 2016 The Chromium Authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #ifndef ASH_ACCELERATORS_ACCELERATOR_IDS_H_ #define ASH_ACCELERATORS_ACCELERATOR_IDS_H_ namespace ash { // Accelerator ids consist of two parts: // . Upper 16 bits identifies source (namespace part). // . Lower 16 supplied from client (local part). constexpr uint16_t kLocalIdMask = 0xFFFF; inline uint32_t ComputeAcceleratorId(uint16_t accelerator_namespace, uint16_t local_id) { return (accelerator_namespace << 16) | local_id; } inline uint16_t GetAcceleratorLocalId(uint32_t accelerator_id) { return static_cast(accelerator_id & kLocalIdMask); } inline uint16_t GetAcceleratorNamespaceId(uint32_t accelerator_id) { return static_cast((accelerator_id >> 16) & kLocalIdMask); } } // namespace ash #endif // ASH_ACCELERATORS_ACCELERATOR_IDS_H_