1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsCOMPtr.h"
#include "nsProxyRelease.h"
#include "nsComponentManagerUtils.h"
#include "nsServiceManagerUtils.h"
#include "nsThreadUtils.h"
#include "nsXPCOM.h"
#include "nsXPCOMCID.h"
#include "nsIObserver.h"
#include "nsIObserverService.h"
#include "nsWifiMonitor.h"
#include "nsWifiAccessPoint.h"
#include "nsServiceManagerUtils.h"
#include "nsComponentManagerUtils.h"
#include "mozilla/IntegerPrintfMacros.h"
#include "mozilla/Services.h"
using namespace mozilla;
LazyLogModule gWifiMonitorLog("WifiMonitor");
NS_IMPL_ISUPPORTS(nsWifiMonitor, nsIRunnable, nsIObserver, nsIWifiMonitor)
nsWifiMonitor::nsWifiMonitor()
: mKeepGoing(true),
mThreadComplete(false),
mReentrantMonitor("nsWifiMonitor.mReentrantMonitor") {
nsCOMPtr<nsIObserverService> obsSvc = mozilla::services::GetObserverService();
if (obsSvc) obsSvc->AddObserver(this, "xpcom-shutdown", false);
LOG(("@@@@@ wifimonitor created\n"));
}
NS_IMETHODIMP
nsWifiMonitor::Observe(nsISupports* subject, const char* topic,
const char16_t* data) {
if (!strcmp(topic, "xpcom-shutdown")) {
LOG(("Shutting down\n"));
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
mKeepGoing = false;
mon.Notify();
mThread = nullptr;
}
return NS_OK;
}
NS_IMETHODIMP nsWifiMonitor::StartWatching(nsIWifiListener* aListener) {
LOG(("nsWifiMonitor::StartWatching %p thread %p listener %p\n", this,
mThread.get(), aListener));
MOZ_ASSERT(NS_IsMainThread());
if (!aListener) return NS_ERROR_NULL_POINTER;
if (!mKeepGoing) {
return NS_ERROR_NOT_AVAILABLE;
}
nsresult rv = NS_OK;
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
if (mThreadComplete) {
// generally there is just one thread for the lifetime of the service,
// but if DoScan returns with an error before shutdown (i.e. !mKeepGoing)
// then we will respawn the thread.
LOG(("nsWifiMonitor::StartWatching %p restarting thread\n", this));
mThreadComplete = false;
mThread = nullptr;
}
if (!mThread) {
rv = NS_NewNamedThread("Wifi Monitor", getter_AddRefs(mThread), this);
if (NS_FAILED(rv)) return rv;
}
mListeners.AppendElement(
nsWifiListener(new nsMainThreadPtrHolder<nsIWifiListener>(
"nsIWifiListener", aListener)));
// tell ourselves that we have a new watcher.
mon.Notify();
return NS_OK;
}
NS_IMETHODIMP nsWifiMonitor::StopWatching(nsIWifiListener* aListener) {
LOG(("nsWifiMonitor::StopWatching %p thread %p listener %p\n", this,
mThread.get(), aListener));
MOZ_ASSERT(NS_IsMainThread());
if (!aListener) return NS_ERROR_NULL_POINTER;
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
for (uint32_t i = 0; i < mListeners.Length(); i++) {
if (mListeners[i].mListener == aListener) {
mListeners.RemoveElementAt(i);
break;
}
}
return NS_OK;
}
typedef nsTArray<nsMainThreadPtrHandle<nsIWifiListener>> WifiListenerArray;
class nsPassErrorToWifiListeners final : public nsIRunnable {
public:
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIRUNNABLE
nsPassErrorToWifiListeners(UniquePtr<WifiListenerArray>&& aListeners,
nsresult aResult)
: mListeners(std::move(aListeners)), mResult(aResult) {}
private:
~nsPassErrorToWifiListeners() = default;
UniquePtr<WifiListenerArray> mListeners;
nsresult mResult;
};
NS_IMPL_ISUPPORTS(nsPassErrorToWifiListeners, nsIRunnable)
NS_IMETHODIMP nsPassErrorToWifiListeners::Run() {
LOG(("About to send error to the wifi listeners\n"));
for (size_t i = 0; i < mListeners->Length(); i++) {
(*mListeners)[i]->OnError(mResult);
}
return NS_OK;
}
NS_IMETHODIMP nsWifiMonitor::Run() {
LOG(("@@@@@ wifi monitor run called\n"));
nsresult rv = DoScan();
LOG(("@@@@@ wifi monitor run::doscan complete %" PRIx32 "\n",
static_cast<uint32_t>(rv)));
UniquePtr<WifiListenerArray> currentListeners;
bool doError = false;
{
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
if (mKeepGoing && NS_FAILED(rv)) {
doError = true;
currentListeners = MakeUnique<WifiListenerArray>(mListeners.Length());
for (uint32_t i = 0; i < mListeners.Length(); i++)
currentListeners->AppendElement(mListeners[i].mListener);
}
mThreadComplete = true;
}
if (doError) {
nsCOMPtr<nsIEventTarget> target = GetMainThreadEventTarget();
if (!target) return NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIRunnable> runnable(
new nsPassErrorToWifiListeners(std::move(currentListeners), rv));
if (!runnable) return NS_ERROR_OUT_OF_MEMORY;
target->Dispatch(runnable, NS_DISPATCH_SYNC);
}
LOG(("@@@@@ wifi monitor run complete\n"));
return NS_OK;
}
class nsCallWifiListeners final : public nsIRunnable {
public:
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIRUNNABLE
nsCallWifiListeners(WifiListenerArray&& aListeners,
nsTArray<RefPtr<nsIWifiAccessPoint>>&& aAccessPoints)
: mListeners(std::move(aListeners)),
mAccessPoints(std::move(aAccessPoints)) {}
private:
~nsCallWifiListeners() = default;
const WifiListenerArray mListeners;
const nsTArray<RefPtr<nsIWifiAccessPoint>> mAccessPoints;
};
NS_IMPL_ISUPPORTS(nsCallWifiListeners, nsIRunnable)
NS_IMETHODIMP nsCallWifiListeners::Run() {
LOG(("About to send data to the wifi listeners\n"));
for (auto& listener : mListeners) {
listener->OnChange(mAccessPoints);
}
return NS_OK;
}
nsresult nsWifiMonitor::CallWifiListeners(
const nsCOMArray<nsWifiAccessPoint>& aAccessPoints,
bool aAccessPointsChanged) {
WifiListenerArray currentListeners;
{
ReentrantMonitorAutoEnter mon(mReentrantMonitor);
currentListeners.SetCapacity(mListeners.Length());
for (auto& listener : mListeners) {
if (!listener.mHasSentData || aAccessPointsChanged) {
listener.mHasSentData = true;
currentListeners.AppendElement(listener.mListener);
}
}
}
if (!currentListeners.IsEmpty()) {
uint32_t resultCount = aAccessPoints.Count();
nsTArray<RefPtr<nsIWifiAccessPoint>> accessPoints(resultCount);
for (uint32_t i = 0; i < resultCount; i++) {
accessPoints.AppendElement(aAccessPoints[i]);
}
nsCOMPtr<nsIThread> thread = do_GetMainThread();
if (!thread) return NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIRunnable> runnable(new nsCallWifiListeners(
std::move(currentListeners), std::move(accessPoints)));
if (!runnable) return NS_ERROR_OUT_OF_MEMORY;
thread->Dispatch(runnable, NS_DISPATCH_SYNC);
}
return NS_OK;
}
|
