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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "device/time_zone_monitor/time_zone_monitor.h" | 5 #include "device/time_zone_monitor/time_zone_monitor.h" |
| 6 | 6 |
| 7 #include <stddef.h> | 7 #include <stddef.h> |
| 8 #include <stdlib.h> | 8 #include <stdlib.h> |
| 9 | 9 |
| 10 #include <memory> |
| 10 #include <vector> | 11 #include <vector> |
| 11 | 12 |
| 12 #include "base/bind.h" | 13 #include "base/bind.h" |
| 13 #include "base/files/file_path.h" | 14 #include "base/files/file_path.h" |
| 14 #include "base/files/file_path_watcher.h" | 15 #include "base/files/file_path_watcher.h" |
| 15 #include "base/macros.h" | 16 #include "base/macros.h" |
| 17 #include "base/memory/ptr_util.h" |
| 16 #include "base/memory/ref_counted.h" | 18 #include "base/memory/ref_counted.h" |
| 17 #include "base/sequenced_task_runner.h" | 19 #include "base/sequenced_task_runner.h" |
| 18 #include "base/stl_util.h" | 20 #include "base/stl_util.h" |
| 19 #include "base/threading/thread_restrictions.h" | 21 #include "base/threading/thread_restrictions.h" |
| 20 #include "base/threading/thread_task_runner_handle.h" | 22 #include "base/threading/thread_task_runner_handle.h" |
| 21 #include "build/build_config.h" | 23 #include "build/build_config.h" |
| 22 | 24 |
| 23 #if !defined(OS_CHROMEOS) | 25 #if !defined(OS_CHROMEOS) |
| 24 | 26 |
| 25 namespace device { | 27 namespace device { |
| (...skipping 21 matching lines...) Expand all Loading... |
| 47 // FilePathWatcher needs to run on the FILE thread, but TimeZoneMonitor runs | 49 // FilePathWatcher needs to run on the FILE thread, but TimeZoneMonitor runs |
| 48 // on the UI thread. TimeZoneMonitorLinuxImpl is the bridge between these | 50 // on the UI thread. TimeZoneMonitorLinuxImpl is the bridge between these |
| 49 // threads. | 51 // threads. |
| 50 class TimeZoneMonitorLinuxImpl | 52 class TimeZoneMonitorLinuxImpl |
| 51 : public base::RefCountedThreadSafe<TimeZoneMonitorLinuxImpl> { | 53 : public base::RefCountedThreadSafe<TimeZoneMonitorLinuxImpl> { |
| 52 public: | 54 public: |
| 53 explicit TimeZoneMonitorLinuxImpl( | 55 explicit TimeZoneMonitorLinuxImpl( |
| 54 TimeZoneMonitorLinux* owner, | 56 TimeZoneMonitorLinux* owner, |
| 55 scoped_refptr<base::SequencedTaskRunner> file_task_runner) | 57 scoped_refptr<base::SequencedTaskRunner> file_task_runner) |
| 56 : base::RefCountedThreadSafe<TimeZoneMonitorLinuxImpl>(), | 58 : base::RefCountedThreadSafe<TimeZoneMonitorLinuxImpl>(), |
| 57 file_path_watchers_(), | |
| 58 main_task_runner_(base::ThreadTaskRunnerHandle::Get()), | 59 main_task_runner_(base::ThreadTaskRunnerHandle::Get()), |
| 59 file_task_runner_(file_task_runner), | 60 file_task_runner_(file_task_runner), |
| 60 owner_(owner) { | 61 owner_(owner) { |
| 61 DCHECK(main_task_runner_->RunsTasksOnCurrentThread()); | 62 DCHECK(main_task_runner_->RunsTasksOnCurrentThread()); |
| 62 file_task_runner_->PostTask( | 63 file_task_runner_->PostTask( |
| 63 FROM_HERE, | 64 FROM_HERE, |
| 64 base::Bind(&TimeZoneMonitorLinuxImpl::StartWatchingOnFileThread, this)); | 65 base::Bind(&TimeZoneMonitorLinuxImpl::StartWatchingOnFileThread, this)); |
| 65 } | 66 } |
| 66 | 67 |
| 67 void StopWatching() { | 68 void StopWatching() { |
| 68 DCHECK(main_task_runner_->RunsTasksOnCurrentThread()); | 69 DCHECK(main_task_runner_->RunsTasksOnCurrentThread()); |
| 69 owner_ = NULL; | 70 owner_ = NULL; |
| 70 file_task_runner_->PostTask( | 71 file_task_runner_->PostTask( |
| 71 FROM_HERE, | 72 FROM_HERE, |
| 72 base::Bind(&TimeZoneMonitorLinuxImpl::StopWatchingOnFileThread, this)); | 73 base::Bind(&TimeZoneMonitorLinuxImpl::StopWatchingOnFileThread, this)); |
| 73 } | 74 } |
| 74 | 75 |
| 75 private: | 76 private: |
| 76 friend class base::RefCountedThreadSafe<TimeZoneMonitorLinuxImpl>; | 77 friend class base::RefCountedThreadSafe<TimeZoneMonitorLinuxImpl>; |
| 77 | 78 |
| 78 ~TimeZoneMonitorLinuxImpl() { | 79 ~TimeZoneMonitorLinuxImpl() { |
| 79 DCHECK(!owner_); | 80 DCHECK(!owner_); |
| 80 base::STLDeleteElements(&file_path_watchers_); | |
| 81 } | 81 } |
| 82 | 82 |
| 83 void StartWatchingOnFileThread() { | 83 void StartWatchingOnFileThread() { |
| 84 base::ThreadRestrictions::AssertIOAllowed(); | 84 base::ThreadRestrictions::AssertIOAllowed(); |
| 85 DCHECK(file_task_runner_->RunsTasksOnCurrentThread()); | 85 DCHECK(file_task_runner_->RunsTasksOnCurrentThread()); |
| 86 | 86 |
| 87 // There is no true standard for where time zone information is actually | 87 // There is no true standard for where time zone information is actually |
| 88 // stored. glibc uses /etc/localtime, uClibc uses /etc/TZ, and some older | 88 // stored. glibc uses /etc/localtime, uClibc uses /etc/TZ, and some older |
| 89 // systems store the name of the time zone file within /usr/share/zoneinfo | 89 // systems store the name of the time zone file within /usr/share/zoneinfo |
| 90 // in /etc/timezone. Different libraries and custom builds may mean that | 90 // in /etc/timezone. Different libraries and custom builds may mean that |
| 91 // still more paths are used. Just watch all three of these paths, because | 91 // still more paths are used. Just watch all three of these paths, because |
| 92 // false positives are harmless, assuming the false positive rate is | 92 // false positives are harmless, assuming the false positive rate is |
| 93 // reasonable. | 93 // reasonable. |
| 94 const char* const kFilesToWatch[] = { | 94 const char* const kFilesToWatch[] = { |
| 95 "/etc/localtime", "/etc/timezone", "/etc/TZ", | 95 "/etc/localtime", "/etc/timezone", "/etc/TZ", |
| 96 }; | 96 }; |
| 97 | 97 |
| 98 for (size_t index = 0; index < arraysize(kFilesToWatch); ++index) { | 98 for (size_t index = 0; index < arraysize(kFilesToWatch); ++index) { |
| 99 file_path_watchers_.push_back(new base::FilePathWatcher()); | 99 file_path_watchers_.push_back(base::MakeUnique<base::FilePathWatcher>()); |
| 100 file_path_watchers_.back()->Watch( | 100 file_path_watchers_.back()->Watch( |
| 101 base::FilePath(kFilesToWatch[index]), false, | 101 base::FilePath(kFilesToWatch[index]), false, |
| 102 base::Bind(&TimeZoneMonitorLinuxImpl::OnTimeZoneFileChanged, this)); | 102 base::Bind(&TimeZoneMonitorLinuxImpl::OnTimeZoneFileChanged, this)); |
| 103 } | 103 } |
| 104 } | 104 } |
| 105 | 105 |
| 106 void StopWatchingOnFileThread() { | 106 void StopWatchingOnFileThread() { |
| 107 DCHECK(file_task_runner_->RunsTasksOnCurrentThread()); | 107 DCHECK(file_task_runner_->RunsTasksOnCurrentThread()); |
| 108 base::STLDeleteElements(&file_path_watchers_); | 108 file_path_watchers_.clear(); |
| 109 } | 109 } |
| 110 | 110 |
| 111 void OnTimeZoneFileChanged(const base::FilePath& path, bool error) { | 111 void OnTimeZoneFileChanged(const base::FilePath& path, bool error) { |
| 112 DCHECK(file_task_runner_->RunsTasksOnCurrentThread()); | 112 DCHECK(file_task_runner_->RunsTasksOnCurrentThread()); |
| 113 main_task_runner_->PostTask( | 113 main_task_runner_->PostTask( |
| 114 FROM_HERE, | 114 FROM_HERE, |
| 115 base::Bind(&TimeZoneMonitorLinuxImpl::OnTimeZoneFileChangedOnUIThread, | 115 base::Bind(&TimeZoneMonitorLinuxImpl::OnTimeZoneFileChangedOnUIThread, |
| 116 this)); | 116 this)); |
| 117 } | 117 } |
| 118 | 118 |
| 119 void OnTimeZoneFileChangedOnUIThread() { | 119 void OnTimeZoneFileChangedOnUIThread() { |
| 120 DCHECK(main_task_runner_->RunsTasksOnCurrentThread()); | 120 DCHECK(main_task_runner_->RunsTasksOnCurrentThread()); |
| 121 if (owner_) { | 121 if (owner_) { |
| 122 owner_->NotifyClientsFromImpl(); | 122 owner_->NotifyClientsFromImpl(); |
| 123 } | 123 } |
| 124 } | 124 } |
| 125 | 125 |
| 126 std::vector<base::FilePathWatcher*> file_path_watchers_; | 126 std::vector<std::unique_ptr<base::FilePathWatcher>> file_path_watchers_; |
| 127 | 127 |
| 128 scoped_refptr<base::SequencedTaskRunner> main_task_runner_; | 128 scoped_refptr<base::SequencedTaskRunner> main_task_runner_; |
| 129 scoped_refptr<base::SequencedTaskRunner> file_task_runner_; | 129 scoped_refptr<base::SequencedTaskRunner> file_task_runner_; |
| 130 TimeZoneMonitorLinux* owner_; | 130 TimeZoneMonitorLinux* owner_; |
| 131 | 131 |
| 132 DISALLOW_COPY_AND_ASSIGN(TimeZoneMonitorLinuxImpl); | 132 DISALLOW_COPY_AND_ASSIGN(TimeZoneMonitorLinuxImpl); |
| 133 }; | 133 }; |
| 134 | 134 |
| 135 } // namespace | 135 } // namespace |
| 136 | 136 |
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| 164 // static | 164 // static |
| 165 std::unique_ptr<TimeZoneMonitor> TimeZoneMonitor::Create( | 165 std::unique_ptr<TimeZoneMonitor> TimeZoneMonitor::Create( |
| 166 scoped_refptr<base::SequencedTaskRunner> file_task_runner) { | 166 scoped_refptr<base::SequencedTaskRunner> file_task_runner) { |
| 167 return std::unique_ptr<TimeZoneMonitor>( | 167 return std::unique_ptr<TimeZoneMonitor>( |
| 168 new TimeZoneMonitorLinux(file_task_runner)); | 168 new TimeZoneMonitorLinux(file_task_runner)); |
| 169 } | 169 } |
| 170 | 170 |
| 171 } // namespace device | 171 } // namespace device |
| 172 | 172 |
| 173 #endif // !OS_CHROMEOS | 173 #endif // !OS_CHROMEOS |
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