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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 // libudev is used for monitoring device changes. | |
| 6 | |
| 7 #include "content/browser/device_monitor_linux.h" | |
| 8 | |
| 9 #include <libudev.h> | |
| 10 | |
| 11 #include <string> | |
| 12 | |
| 13 #include "base/system_monitor/system_monitor.h" | |
| 14 #include "content/browser/udev_linux.h" | |
| 15 #include "content/public/browser/browser_thread.h" | |
| 16 | |
| 17 namespace { | |
| 18 | |
| 19 struct SubsystemMap { | |
| 20 base::SystemMonitor::DeviceType device_type; | |
| 21 const char* subsystem; | |
| 22 const char* devtype; | |
| 23 }; | |
| 24 | |
| 25 const char kAudioSubsystem[] = "sound"; | |
| 26 const char kVideoSubsystem[] = "video4linux"; | |
| 27 | |
| 28 // Add more subsystems here for monitoring. | |
| 29 const SubsystemMap kSubsystemMap[] = { | |
| 30 { base::SystemMonitor::DEVTYPE_AUDIO_CAPTURE, kAudioSubsystem, NULL }, | |
| 31 { base::SystemMonitor::DEVTYPE_VIDEO_CAPTURE, kVideoSubsystem, NULL }, | |
| 32 }; | |
| 33 | |
| 34 } // namespace | |
| 35 | |
| 36 namespace content { | |
| 37 | |
| 38 DeviceMonitorLinux::DeviceMonitorLinux() { | |
| 39 DCHECK(BrowserThread::IsMessageLoopValid(BrowserThread::IO)); | |
| 40 BrowserThread::PostTask(BrowserThread::IO, | |
| 41 FROM_HERE, | |
| 42 base::Bind(&DeviceMonitorLinux::Initialize, base::Unretained(this))); | |
| 43 } | |
| 44 | |
| 45 DeviceMonitorLinux::~DeviceMonitorLinux() { | |
| 46 } | |
| 47 | |
| 48 void DeviceMonitorLinux::Initialize() { | |
| 49 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); | |
| 50 | |
| 51 // We want to be notified of IO message loop destruction to delete |udev_|. | |
| 52 base::MessageLoop::current()->AddDestructionObserver(this); | |
| 53 | |
| 54 std::vector<UdevLinux::UdevMonitorFilter> filters; | |
| 55 for (size_t i = 0; i < arraysize(kSubsystemMap); ++i) { | |
| 56 filters.push_back(UdevLinux::UdevMonitorFilter( | |
| 57 kSubsystemMap[i].subsystem, kSubsystemMap[i].devtype)); | |
| 58 } | |
| 59 udev_.reset(new UdevLinux(filters, | |
| 60 base::Bind(&DeviceMonitorLinux::OnDevicesChanged, | |
| 61 base::Unretained(this)))); | |
| 62 } | |
| 63 | |
| 64 void DeviceMonitorLinux::WillDestroyCurrentMessageLoop() { | |
| 65 // Called on IO thread. | |
| 66 udev_.reset(); | |
| 67 } | |
| 68 | |
| 69 void DeviceMonitorLinux::OnDevicesChanged(udev_device* device) { | |
| 70 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO)); | |
| 71 DCHECK(device); | |
| 72 | |
| 73 base::SystemMonitor::DeviceType device_type = | |
| 74 base::SystemMonitor::DEVTYPE_UNKNOWN; | |
| 75 std::string subsystem(udev_device_get_subsystem(device)); | |
| 76 for (size_t i = 0; i < arraysize(kSubsystemMap); ++i) { | |
| 77 if (subsystem == kSubsystemMap[i].subsystem) { | |
| 78 device_type = kSubsystemMap[i].device_type; | |
| 79 break; | |
| 80 } | |
| 81 } | |
| 82 DCHECK_NE(device_type, base::SystemMonitor::DEVTYPE_UNKNOWN); | |
| 83 | |
| 84 base::SystemMonitor::Get()->ProcessDevicesChanged(device_type); | |
| 85 } | |
| 86 | |
| 87 } // namespace content | |
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Chromium Code Reviews
Issue 12374068:
Make it possible to disable udev in linux (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master