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
|
// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "mojo/edk/system/channel_manager.h"
#include "base/callback.h"
#include "base/macros.h"
#include "base/message_loop/message_loop.h"
#include "base/message_loop/message_loop_proxy.h"
#include "base/run_loop.h"
#include "base/task_runner.h"
#include "base/test/test_timeouts.h"
#include "base/threading/platform_thread.h"
#include "base/threading/simple_thread.h"
#include "base/time/time.h"
#include "mojo/edk/embedder/platform_channel_pair.h"
#include "mojo/edk/embedder/simple_platform_support.h"
#include "mojo/edk/system/channel.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace mojo {
namespace system {
namespace {
class ChannelManagerTest : public testing::Test {
public:
ChannelManagerTest() : message_loop_(base::MessageLoop::TYPE_IO) {}
~ChannelManagerTest() override {}
protected:
embedder::SimplePlatformSupport* platform_support() {
return &platform_support_;
}
base::MessageLoop* message_loop() { return &message_loop_; }
private:
embedder::SimplePlatformSupport platform_support_;
base::MessageLoop message_loop_;
DISALLOW_COPY_AND_ASSIGN(ChannelManagerTest);
};
TEST_F(ChannelManagerTest, Basic) {
ChannelManager cm;
// Hang on to a ref to the |Channel|, so that we can check that the
// |ChannelManager| takes/releases refs to it.
scoped_refptr<Channel> ch(new Channel(platform_support()));
ASSERT_TRUE(ch->HasOneRef());
embedder::PlatformChannelPair channel_pair;
ch->Init(RawChannel::Create(channel_pair.PassServerHandle()));
ChannelId id = cm.AddChannel(ch, base::MessageLoopProxy::current());
EXPECT_NE(id, 0u);
// |ChannelManager| should take a ref.
EXPECT_FALSE(ch->HasOneRef());
cm.WillShutdownChannel(id);
// |ChannelManager| should still have a ref.
EXPECT_FALSE(ch->HasOneRef());
cm.ShutdownChannel(id);
// On the "I/O" thread, so shutdown should happen synchronously.
// |ChannelManager| should have given up its ref.
EXPECT_TRUE(ch->HasOneRef());
}
TEST_F(ChannelManagerTest, TwoChannels) {
ChannelManager cm;
// Hang on to a ref to each |Channel|, so that we can check that the
// |ChannelManager| takes/releases refs to them.
scoped_refptr<Channel> ch1(new Channel(platform_support()));
ASSERT_TRUE(ch1->HasOneRef());
scoped_refptr<Channel> ch2(new Channel(platform_support()));
ASSERT_TRUE(ch2->HasOneRef());
embedder::PlatformChannelPair channel_pair;
ch1->Init(RawChannel::Create(channel_pair.PassServerHandle()));
ch2->Init(RawChannel::Create(channel_pair.PassClientHandle()));
ChannelId id1 = cm.AddChannel(ch1, base::MessageLoopProxy::current());
EXPECT_NE(id1, 0u);
EXPECT_FALSE(ch1->HasOneRef());
ChannelId id2 = cm.AddChannel(ch2, base::MessageLoopProxy::current());
EXPECT_NE(id2, 0u);
EXPECT_NE(id2, id1);
EXPECT_FALSE(ch2->HasOneRef());
// Calling |WillShutdownChannel()| multiple times (on |id1|) is okay.
cm.WillShutdownChannel(id1);
cm.WillShutdownChannel(id1);
EXPECT_FALSE(ch1->HasOneRef());
// Not calling |WillShutdownChannel()| (on |id2|) is okay too.
cm.ShutdownChannel(id1);
EXPECT_TRUE(ch1->HasOneRef());
cm.ShutdownChannel(id2);
EXPECT_TRUE(ch2->HasOneRef());
}
class OtherThread : public base::SimpleThread {
public:
// Note: We rely on the main thread keeping *exactly one* reference to
// |channel|.
OtherThread(scoped_refptr<base::TaskRunner> task_runner,
ChannelManager* channel_manager,
Channel* channel,
base::Closure quit_closure)
: base::SimpleThread("other_thread"),
task_runner_(task_runner),
channel_manager_(channel_manager),
channel_(channel),
quit_closure_(quit_closure) {}
~OtherThread() override {}
private:
void Run() override {
// See comment above constructor.
ASSERT_TRUE(channel_->HasOneRef());
ChannelId id = channel_manager_->AddChannel(make_scoped_refptr(channel_),
task_runner_);
EXPECT_NE(id, 0u);
// |ChannelManager| should take a ref.
EXPECT_FALSE(channel_->HasOneRef());
channel_manager_->WillShutdownChannel(id);
// |ChannelManager| should still have a ref.
EXPECT_FALSE(channel_->HasOneRef());
channel_manager_->ShutdownChannel(id);
// This doesn't happen synchronously, so we "wait" until it does.
// TODO(vtl): Possibly |Channel| should provide some notification of being
// shut down.
base::TimeTicks start_time(base::TimeTicks::Now());
for (;;) {
if (channel_->HasOneRef())
break;
// Check, instead of assert, since if things go wrong, dying is more
// reliable than tearing down.
CHECK_LT(base::TimeTicks::Now() - start_time,
TestTimeouts::action_timeout());
base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(20));
}
CHECK(task_runner_->PostTask(FROM_HERE, quit_closure_));
}
scoped_refptr<base::TaskRunner> task_runner_;
ChannelManager* channel_manager_;
Channel* channel_;
base::Closure quit_closure_;
DISALLOW_COPY_AND_ASSIGN(OtherThread);
};
TEST_F(ChannelManagerTest, CallsFromOtherThread) {
ChannelManager cm;
// Hang on to a ref to the |Channel|, so that we can check that the
// |ChannelManager| takes/releases refs to it.
scoped_refptr<Channel> ch(new Channel(platform_support()));
ASSERT_TRUE(ch->HasOneRef());
embedder::PlatformChannelPair channel_pair;
ch->Init(RawChannel::Create(channel_pair.PassServerHandle()));
base::RunLoop run_loop;
OtherThread thread(base::MessageLoopProxy::current(), &cm, ch.get(),
run_loop.QuitClosure());
thread.Start();
run_loop.Run();
thread.Join();
}
} // namespace
} // namespace system
} // namespace mojo
|
