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
|
#include <library/cpp/testing/gtest/gtest.h>
#include <library/cpp/yt/threading/count_down_latch.h>
#include <thread>
namespace NYT::NThreading {
namespace {
////////////////////////////////////////////////////////////////////////////////
void WaitForLatch(const TCountDownLatch& latch)
{
latch.Wait();
EXPECT_EQ(0, latch.GetCount());
}
TEST(TCountDownLatch, TwoThreads)
{
TCountDownLatch latch(2);
std::jthread t1(std::bind(&WaitForLatch, std::cref(latch)));
std::jthread t2(std::bind(&WaitForLatch, std::cref(latch)));
EXPECT_EQ(2, latch.GetCount());
latch.CountDown();
EXPECT_EQ(1, latch.GetCount());
latch.CountDown();
EXPECT_EQ(0, latch.GetCount());
}
TEST(TCountDownLatch, TwoThreadsPredecremented)
{
TCountDownLatch latch(2);
EXPECT_EQ(2, latch.GetCount());
latch.CountDown();
EXPECT_EQ(1, latch.GetCount());
latch.CountDown();
EXPECT_EQ(0, latch.GetCount());
std::jthread t1(std::bind(&WaitForLatch, std::cref(latch)));
std::jthread t2(std::bind(&WaitForLatch, std::cref(latch)));
}
TEST(TCountDownLatch, TwoThreadsTwoLatches)
{
TCountDownLatch first(1);
TCountDownLatch second(1);
std::jthread t1([&] () {
first.Wait();
second.CountDown();
EXPECT_EQ(0, first.GetCount());
EXPECT_EQ(0, second.GetCount());
});
std::jthread t2([&] () {
first.CountDown();
second.Wait();
EXPECT_EQ(0, first.GetCount());
EXPECT_EQ(0, second.GetCount());
});
}
////////////////////////////////////////////////////////////////////////////////
} // namespace
} // namespace NYT::NThreading
|
