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
|
# frozen_string_literal: true
# rubocop:todo all
require 'lite_spec_helper'
describe Mongo::ConditionVariable do
let(:lock) { Mutex.new }
let(:condition_variable) do
described_class.new(lock)
end
it 'waits until signaled' do
result = nil
consumer = Thread.new do
lock.synchronize do
result = condition_variable.wait(3)
end
end
# Context switch to start the thread
sleep 0.1
start_time = Mongo::Utils.monotonic_time
lock.synchronize do
condition_variable.signal
end
consumer.join
(Mongo::Utils.monotonic_time - start_time).should < 1
end
it 'waits until broadcast' do
result = nil
consumer = Thread.new do
lock.synchronize do
result = condition_variable.wait(3)
end
end
# Context switch to start the thread
sleep 0.1
start_time = Mongo::Utils.monotonic_time
lock.synchronize do
condition_variable.broadcast
end
consumer.join
(Mongo::Utils.monotonic_time - start_time).should < 1
end
it 'times out' do
result = nil
consumer = Thread.new do
lock.synchronize do
result = condition_variable.wait(2)
end
end
# Context switch to start the thread
sleep 0.1
start_time = Mongo::Utils.monotonic_time
consumer.join
(Mongo::Utils.monotonic_time - start_time).should > 1
end
context "when acquiring the lock and waiting" do
it "releases the lock while waiting" do
lock_acquired = false
Timeout::timeout(1) do
thread = Thread.new do
until lock_acquired
sleep 0.1
end
lock.synchronize do
condition_variable.signal
end
end
lock.synchronize do
lock_acquired = true
condition_variable.wait(10)
end
end
end
end
context "when waiting but not signaling" do
it "waits until timeout" do
lock.synchronize do
start = Mongo::Utils.monotonic_time
condition_variable.wait(1)
duration = Mongo::Utils.monotonic_time - start
expect(duration).to be > 1
end
end
end
end
|
