1 // Copyright (c) 2011 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 #include "chrome/browser/policy/configuration_policy_loader_win.h"
6
7 #include <userenv.h>
8
9 #include "content/browser/browser_thread.h"
10
11 namespace policy {
12
ConfigurationPolicyLoaderWin(AsynchronousPolicyProvider::Delegate * delegate,int reload_interval_minutes)13 ConfigurationPolicyLoaderWin::ConfigurationPolicyLoaderWin(
14 AsynchronousPolicyProvider::Delegate* delegate,
15 int reload_interval_minutes)
16 : AsynchronousPolicyLoader(delegate, reload_interval_minutes),
17 user_policy_changed_event_(false, false),
18 machine_policy_changed_event_(false, false),
19 user_policy_watcher_failed_(false),
20 machine_policy_watcher_failed_(false) {
21 if (!RegisterGPNotification(user_policy_changed_event_.handle(), false)) {
22 PLOG(WARNING) << "Failed to register user group policy notification";
23 user_policy_watcher_failed_ = true;
24 }
25 if (!RegisterGPNotification(machine_policy_changed_event_.handle(), true)) {
26 PLOG(WARNING) << "Failed to register machine group policy notification.";
27 machine_policy_watcher_failed_ = true;
28 }
29 }
30
InitOnFileThread()31 void ConfigurationPolicyLoaderWin::InitOnFileThread() {
32 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
33 AsynchronousPolicyLoader::InitOnFileThread();
34 SetupWatches();
35 }
36
StopOnFileThread()37 void ConfigurationPolicyLoaderWin::StopOnFileThread() {
38 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
39 user_policy_watcher_.StopWatching();
40 machine_policy_watcher_.StopWatching();
41 AsynchronousPolicyLoader::StopOnFileThread();
42 }
43
SetupWatches()44 void ConfigurationPolicyLoaderWin::SetupWatches() {
45 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
46 CancelReloadTask();
47
48 if (!user_policy_watcher_failed_ &&
49 !user_policy_watcher_.GetWatchedObject() &&
50 !user_policy_watcher_.StartWatching(
51 user_policy_changed_event_.handle(), this)) {
52 LOG(WARNING) << "Failed to start watch for user policy change event";
53 user_policy_watcher_failed_ = true;
54 }
55 if (!machine_policy_watcher_failed_ &&
56 !machine_policy_watcher_.GetWatchedObject() &&
57 !machine_policy_watcher_.StartWatching(
58 machine_policy_changed_event_.handle(), this)) {
59 LOG(WARNING) << "Failed to start watch for machine policy change event";
60 machine_policy_watcher_failed_ = true;
61 }
62
63 if (user_policy_watcher_failed_ || machine_policy_watcher_failed_)
64 ScheduleFallbackReloadTask();
65 }
66
Reload()67 void ConfigurationPolicyLoaderWin::Reload() {
68 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
69 AsynchronousPolicyLoader::Reload();
70 SetupWatches();
71 }
72
OnObjectSignaled(HANDLE object)73 void ConfigurationPolicyLoaderWin::OnObjectSignaled(HANDLE object) {
74 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE));
75 DCHECK(object == user_policy_changed_event_.handle() ||
76 object == machine_policy_changed_event_.handle())
77 << "unexpected object signaled policy reload, obj = "
78 << std::showbase << std::hex << object;
79 Reload();
80 }
81
82 } // namespace policy
83