blob: df7872dc76671feee1e3171435a0ed15871ea0ae (
plain)
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
|
require 'thread'
class LocalBarrier
def initialize(n)
@wait = Queue.new
@done = Queue.new
@keeper = begin_keeper(n)
end
def sync
@done.push(true)
@wait.pop
end
def join
@keeper.join
end
private
def begin_keeper(n)
Thread.start do
n.times do
@done.pop
end
n.times do
@wait.push(true)
end
end
end
end
n = 10
lb = LocalBarrier.new(n)
(n - 1).times do |i|
Thread.start do
sleep((rand(n) + 1) / 10.0)
puts "#{i}: done"
lb.sync
puts "#{i}: cont"
end
end
lb.sync
puts "#{n-1}: cone"
puts "exit."
|