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
|
// SPDX-FileCopyrightText: 2023 UnionTech Software Technology Co., Ltd.
//
// SPDX-License-Identifier: GPL-3.0-or-later
#include "cliapplicationhelper.h"
#include <unistd.h>
#include <QLoggingCategory>
#include <QLockFile>
#include <QLocalServer>
#include <QLocalSocket>
#include <QDir>
#include <QDataStream>
using HelperCreator = CliApplicationHelper::HelperCreator;
#ifdef QT_DEBUG
Q_LOGGING_CATEGORY(dgAppHelper, "org.deepin.logger")
#else
Q_LOGGING_CATEGORY(dgAppHelper, "org.deepin.logger", QtInfoMsg)
#endif
Q_GLOBAL_STATIC(QLocalServer, _d_singleServer)
/*!
@brief cli程序单实例类
@private
*/
class _CliApplicationHelper
{
public:
#define INVALID_HELPER reinterpret_cast<CliApplicationHelper*>(1)
inline CliApplicationHelper *helper()
{
// 临时存储一个无效的指针值, 用于此处条件变量的竞争
if (m_helper.testAndSetRelaxed(nullptr, INVALID_HELPER)) {
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
m_helper.storeRelaxed(creator());
}
return m_helper.loadRelaxed();
#else
m_helper.store(creator());
}
return m_helper.load();
#endif
}
inline void clear()
{
if (m_helper != INVALID_HELPER)
delete m_helper.fetchAndStoreRelaxed(nullptr);
}
static CliApplicationHelper *defaultCreator()
{
return new CliApplicationHelper();
}
QAtomicPointer<CliApplicationHelper> m_helper;
static HelperCreator creator;
};
HelperCreator _CliApplicationHelper::creator = _CliApplicationHelper::defaultCreator;
static quint8 _d_singleServerVersion = 1;
Q_GLOBAL_STATIC(_CliApplicationHelper, _globalHelper)
int CliApplicationHelper::waitTime = 3000;
bool CliApplicationHelper::setSingleInstance(const QString &key, CliApplicationHelper::SingleScope singleScope)
{
bool new_server = !_d_singleServer.exists();
if (_d_singleServer->isListening()) {
_d_singleServer->close();
}
QString socket_key = "_d_deepin_logger_single_instance_";
switch (singleScope) {
case GroupScope:
_d_singleServer->setSocketOptions(QLocalServer::GroupAccessOption);
#ifdef Q_OS_LINUX
socket_key += QString("%1_").arg(getgid());
#endif
break;
case WorldScope:
_d_singleServer->setSocketOptions(QLocalServer::WorldAccessOption);
break;
default:
_d_singleServer->setSocketOptions(QLocalServer::UserAccessOption);
#ifdef Q_OS_LINUX
socket_key += QString("%1_").arg(getuid());
#endif
break;
}
socket_key += key;
QString lockfile = socket_key;
if (!lockfile.startsWith(QLatin1Char('/'))) {
lockfile = QDir::cleanPath(QDir::tempPath());
lockfile += QLatin1Char('/') + socket_key;
}
lockfile += QStringLiteral(".lock");
static QScopedPointer <QLockFile> lock(new QLockFile(lockfile));
// 同一个进程多次调用本接口使用最后一次设置的 key
// FIX dcc 使用不同的 key 两次调用 setSingleInstance 后无法启动的问题
qint64 tpid = -1;
QString hostname, appname;
if (lock->isLocked() && lock->getLockInfo(&tpid, &hostname, &appname) && tpid == getpid()) {
qCWarning(dgAppHelper) << "call setSingleInstance again within the same process";
lock->unlock();
lock.reset(new QLockFile(lockfile));
}
if (!lock->tryLock()) {
qCDebug(dgAppHelper) << "===> new client <===" << getpid();
// 通知别的实例
QLocalSocket socket;
socket.connectToServer(socket_key);
// 等待到有效数据时认为server实例有效
if (socket.waitForConnected(CliApplicationHelper::waitTime) &&
socket.waitForReadyRead(CliApplicationHelper::waitTime)) {
// 读取数据
qint8 version;
qint64 pid;
QStringList arguments;
QDataStream ds(&socket);
ds >> version >> pid >> arguments;
qCInfo(dgAppHelper) << "Process is started: pid=" << pid << "arguments=" << arguments;
// 把自己的信息告诉第一个实例
ds << _d_singleServerVersion << qApp->applicationPid() << qApp->arguments();
socket.flush();
}
return false;
}
if (!_d_singleServer->listen(socket_key)) {
qCWarning(dgAppHelper) << "listen failed:" << _d_singleServer->errorString();
return false;
}
if (new_server) {
QObject::connect(_d_singleServer, &QLocalServer::newConnection, qApp, [] {
QLocalSocket *instance = _d_singleServer->nextPendingConnection();
// 先发送数据告诉新的实例自己收到了它的请求
QDataStream ds(instance);
ds << _d_singleServerVersion // 协议版本
<< qApp->applicationPid() // 进程id
<< qApp->arguments(); // 启动时的参数
QObject::connect(instance, &QLocalSocket::readyRead, qApp, [instance] {
// 读取数据
QDataStream ds(instance);
qint8 version;
qint64 pid;
QStringList arguments;
ds >> version >> pid >> arguments;
instance->close();
qCInfo(dgAppHelper) << "New instance: pid=" << pid << "arguments=" << arguments;
// 通知新进程的信息
if (_globalHelper.exists() && _globalHelper->helper())
Q_EMIT _globalHelper->helper()->newProcessInstance(pid, arguments);
});
instance->flush(); //发送数据给新的实例
});
}
return true;
}
CliApplicationHelper::CliApplicationHelper()
: QObject(nullptr)
{
// 跟随application销毁
qAddPostRoutine(staticCleanApplication);
}
CliApplicationHelper::~CliApplicationHelper()
{
_globalHelper->m_helper = nullptr;
}
void CliApplicationHelper::staticCleanApplication()
{
if (_globalHelper.exists())
_globalHelper->clear();
}
CliApplicationHelper *CliApplicationHelper::instance()
{
return _globalHelper->helper();
}
|
