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| 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 // TransientDeviceIds implementation. | |
| 6 | |
| 7 #include "chrome/browser/media_gallery/transient_device_ids.h" | |
| 8 | |
| 9 #include "base/logging.h" | |
| 10 #include "chrome/browser/system_monitor/media_storage_util.h" | |
| 11 | |
| 12 namespace chrome { | |
| 13 | |
| 14 TransientDeviceIds::TransientDeviceIds() : next_transient_id_(1) {} | |
| 15 | |
| 16 TransientDeviceIds::~TransientDeviceIds() {} | |
| 17 | |
| 18 uint64 TransientDeviceIds::GetTransientIdForDeviceId( | |
| 19 const std::string& device_id) { | |
| 20 DCHECK(thread_checker_.CalledOnValidThread()); | |
| 21 DCHECK(MediaStorageUtil::IsRemovableDevice(device_id)); | |
| 22 | |
| 23 bool inserted = | |
| 24 id_map_.insert(std::make_pair(device_id, next_transient_id_)).second; | |
| 25 if (inserted) { | |
| 26 // Inserted a device that has never been seen before. | |
| 27 ++next_transient_id_; | |
| 28 } | |
| 29 return id_map_[device_id]; | |
| 30 } | |
| 31 | |
| 32 } // namespace chrome | |
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