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
|
/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//#define LOG_NDEBUG 0
#define LOG_TAG "ALooperRoster"
#include <utils/Log.h>
#include <utils/String8.h>
#include "ALooperRoster.h"
#include "ADebug.h"
#include "AHandler.h"
#include "AMessage.h"
namespace android {
static bool verboseStats = false;
ALooperRoster::ALooperRoster()
: mNextHandlerID(1) {
}
ALooper::handler_id ALooperRoster::registerHandler(
const sp<ALooper> looper, const sp<AHandler> &handler) {
Mutex::Autolock autoLock(mLock);
if (handler->id() != 0) {
CHECK(!"A handler must only be registered once.");
return INVALID_OPERATION;
}
HandlerInfo info;
info.mLooper = looper;
info.mHandler = handler;
ALooper::handler_id handlerID = mNextHandlerID++;
mHandlers.add(handlerID, info);
handler->setID(handlerID, looper);
return handlerID;
}
void ALooperRoster::unregisterHandler(ALooper::handler_id handlerID) {
Mutex::Autolock autoLock(mLock);
ssize_t index = mHandlers.indexOfKey(handlerID);
if (index < 0) {
return;
}
const HandlerInfo &info = mHandlers.valueAt(index);
sp<AHandler> handler = info.mHandler.promote();
if (handler != NULL) {
handler->setID(0, NULL);
}
mHandlers.removeItemsAt(index);
}
void ALooperRoster::unregisterStaleHandlers() {
Vector<sp<ALooper> > activeLoopers;
{
Mutex::Autolock autoLock(mLock);
for (size_t i = mHandlers.size(); i > 0;) {
i--;
const HandlerInfo &info = mHandlers.valueAt(i);
sp<ALooper> looper = info.mLooper.promote();
if (looper == NULL) {
ALOGV("Unregistering stale handler %d", mHandlers.keyAt(i));
mHandlers.removeItemsAt(i);
} else {
// At this point 'looper' might be the only sp<> keeping
// the object alive. To prevent it from going out of scope
// and having ~ALooper call this method again recursively
// and then deadlocking because of the Autolock above, add
// it to a Vector which will go out of scope after the lock
// has been released.
activeLoopers.add(looper);
}
}
}
}
static void makeFourCC(uint32_t fourcc, char *s) {
s[0] = (fourcc >> 24) & 0xff;
if (s[0]) {
s[1] = (fourcc >> 16) & 0xff;
s[2] = (fourcc >> 8) & 0xff;
s[3] = fourcc & 0xff;
s[4] = 0;
} else {
sprintf(s, "%u", fourcc);
}
}
void ALooperRoster::dump(int fd, const Vector<String16>& args) {
bool clear = false;
bool oldVerbose = verboseStats;
for (size_t i = 0; i < args.size(); i++) {
if (args[i] == String16("-c")) {
clear = true;
} else if (args[i] == String16("-von")) {
verboseStats = true;
} else if (args[i] == String16("-voff")) {
verboseStats = false;
}
}
String8 s;
if (verboseStats && !oldVerbose) {
s.append("(verbose stats collection enabled, stats will be cleared)\n");
}
Mutex::Autolock autoLock(mLock);
size_t n = mHandlers.size();
s.appendFormat(" %zu registered handlers:\n", n);
for (size_t i = 0; i < n; i++) {
s.appendFormat(" %d: ", mHandlers.keyAt(i));
HandlerInfo &info = mHandlers.editValueAt(i);
sp<ALooper> looper = info.mLooper.promote();
if (looper != NULL) {
s.append(looper->getName());
sp<AHandler> handler = info.mHandler.promote();
if (handler != NULL) {
handler->mVerboseStats = verboseStats;
s.appendFormat(": %u messages processed", handler->mMessageCounter);
if (verboseStats) {
for (size_t j = 0; j < handler->mMessages.size(); j++) {
char fourcc[15];
makeFourCC(handler->mMessages.keyAt(j), fourcc);
s.appendFormat("\n %s: %u",
fourcc,
handler->mMessages.valueAt(j));
}
} else {
handler->mMessages.clear();
}
if (clear || (verboseStats && !oldVerbose)) {
handler->mMessageCounter = 0;
handler->mMessages.clear();
}
} else {
s.append(": <stale handler>");
}
} else {
s.append("<stale>");
}
s.append("\n");
}
write(fd, s.string(), s.size());
}
} // namespace android
|
