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
|
// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/testkit/test_kit.h>
#include <vespa/vespalib/testkit/time_bomb.h>
#include <vespa/vespalib/net/socket_handle.h>
#include <vespa/vespalib/net/socket_utils.h>
#include <vespa/vespalib/portal/reactor.h>
#include <vespa/vespalib/util/gate.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
using namespace vespalib;
using namespace vespalib::portal;
struct SocketPair {
SocketHandle main;
SocketHandle other;
SocketPair() : main(), other() {
int sockets[2];
socketutils::nonblocking_socketpair(AF_UNIX, SOCK_STREAM, 0, sockets);
main.reset(sockets[0]);
other.reset(sockets[1]);
// make main socket both readable and writable
ASSERT_EQUAL(other.write("x", 1), 1);
}
~SocketPair();
};
SocketPair::~SocketPair() = default;
std::atomic<size_t> tick_cnt = 0;
int tick() {
++tick_cnt;
std::this_thread::sleep_for(std::chrono::milliseconds(1));
return 0;
}
void wait_tick() {
size_t sample = tick_cnt;
while (sample == tick_cnt) {
std::this_thread::sleep_for(std::chrono::milliseconds(1));
}
}
struct HandlerBase : Reactor::EventHandler {
SocketPair sockets;
std::atomic<size_t> read_cnt;
std::atomic<size_t> write_cnt;
HandlerBase()
: sockets(), read_cnt(0), write_cnt(0)
{
}
void handle_event(bool read, bool write) override {
if (read) {
++read_cnt;
}
if (write) {
++write_cnt;
}
}
void verify(bool read, bool write) {
size_t read_sample = read_cnt;
size_t write_sample = write_cnt;
wait_tick();
wait_tick();
EXPECT_EQUAL((read_sample != read_cnt), read);
EXPECT_EQUAL((write_sample != write_cnt), write);
}
~HandlerBase();
};
HandlerBase::~HandlerBase() = default;
struct SimpleHandler : HandlerBase {
Reactor::Token::UP token;
SimpleHandler(Reactor &reactor, bool read, bool write)
: HandlerBase(), token()
{
token = reactor.attach(*this, sockets.main.get(), read, write);
}
~SimpleHandler();
};
SimpleHandler::~SimpleHandler() = default;
struct DeletingHandler : HandlerBase {
Gate allow_delete;
Gate token_deleted;
Reactor::Token::UP token;
DeletingHandler(Reactor &reactor)
: HandlerBase(), allow_delete(), token_deleted(), token()
{
token = reactor.attach(*this, sockets.main.get(), true, true);
}
void handle_event(bool read, bool write) override {
HandlerBase::handle_event(read, write);
allow_delete.await();
token.reset();
token_deleted.countDown();
}
~DeletingHandler();
};
DeletingHandler::~DeletingHandler() = default;
struct WaitingHandler : HandlerBase {
Gate enter_callback;
Gate exit_callback;
Reactor::Token::UP token;
WaitingHandler(Reactor &reactor)
: HandlerBase(), enter_callback(), exit_callback(), token()
{
token = reactor.attach(*this, sockets.main.get(), true, true);
}
void handle_event(bool read, bool write) override {
enter_callback.countDown();
HandlerBase::handle_event(read, write);
exit_callback.await();
}
~WaitingHandler();
};
WaitingHandler::~WaitingHandler() = default;
//-----------------------------------------------------------------------------
TEST_FF("require that reactor can produce async io events", Reactor(tick), TimeBomb(60)) {
for (bool read: {true, false}) {
for (bool write: {true, false}) {
{
SimpleHandler handler(f1, read, write);
TEST_DO(handler.verify(read, write));
}
}
}
}
TEST_FF("require that reactor token can be used to change active io events", Reactor(tick), TimeBomb(60)) {
SimpleHandler handler(f1, false, false);
TEST_DO(handler.verify(false, false));
for (int i = 0; i < 2; ++i) {
for (bool read: {true, false}) {
for (bool write: {true, false}) {
handler.token->update(read, write);
wait_tick(); // avoid stale events
TEST_DO(handler.verify(read, write));
}
}
}
}
TEST_FF("require that deleting reactor token disables io events", Reactor(tick), TimeBomb(60)) {
SimpleHandler handler(f1, true, true);
TEST_DO(handler.verify(true, true));
handler.token.reset();
TEST_DO(handler.verify(false, false));
}
TEST_FF("require that reactor token can be destroyed during io event handling", Reactor(tick), TimeBomb(60)) {
DeletingHandler handler(f1);
handler.allow_delete.countDown();
handler.token_deleted.await();
TEST_DO(handler.verify(false, false));
EXPECT_EQUAL(handler.read_cnt, 1u);
EXPECT_EQUAL(handler.write_cnt, 1u);
}
TEST_MT_FFFF("require that reactor token destruction waits for io event handling", 2,
Reactor(), WaitingHandler(f1), Gate(), TimeBomb(60))
{
if (thread_id == 0) {
f2.enter_callback.await();
TEST_BARRIER(); // #1
EXPECT_TRUE(!f3.await(20ms));
f2.exit_callback.countDown();
EXPECT_TRUE(f3.await(60s));
} else {
TEST_BARRIER(); // #1
f2.token.reset();
f3.countDown();
}
}
TEST_MAIN() { TEST_RUN_ALL(); }
|
