blob: 52c2801afb8b64ec26b5ac404d23424560d401b9 (
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
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
|
require 'thread'
require 'singleton'
module Mauve
class MauveThread
attr_reader :state, :poll_every
def initialize
@thread = nil
@state = :stopped
end
def logger
@logger ||= Log4r::Logger.new(self.class.to_s)
end
def poll_every=(i)
raise ArgumentError.new("poll_every must be numeric") unless i.is_a?(Numeric)
@poll_every = i
end
def run_thread(interval = 0.1)
#
# Good to go.
#
self.state = :starting
@poll_every ||= interval
sleep_loops = (@poll_every.to_f / 0.1).round.to_i
sleep_loops = 1 if sleep_loops.nil? or sleep_loops < 1
while self.state != :stopping do
self.state = :started if self.state == :starting
#
# Schtop!
#
if self.state == :freezing
self.state = :frozen
Thread.stop
self.state = :started
end
yield
#
# Ah-ha! Sleep with a break clause.
#
sleep_loops.times do
break if self.should_stop?
#
# This is a rate-limiting step
#
Kernel.sleep 0.1
end
end
self.state = :stopped
end
def should_stop?
[:freezing, :stopping].include?(self.state)
end
def state=(s)
raise "Bad state for mauve_thread #{s.inspect}" unless [:stopped, :starting, :started, :freezing, :frozen, :stopping, :killing, :killed].include?(s)
unless @state == s
@state = s
logger.debug(s.to_s.capitalize)
end
end
def freeze
self.state = :freezing
20.times { Kernel.sleep 0.1 ; break if @thread.stop? }
logger.debug("Thread has not frozen!") unless @thread.stop?
end
def frozen?
self.stop? and self.state == :frozen
end
def run
if self.alive?
if self.stop?
@thread.wakeup
end
else
@logger = nil
self.state = :starting
@thread = Thread.new{ self.run_thread { self.main_loop } }
end
end
alias start run
alias thaw run
def alive?
@thread.is_a?(Thread) and @thread.alive?
end
def stop?
self.alive? and @thread.stop?
end
def join(ok_exceptions=[])
@thread.join if @thread.is_a?(Thread)
end
# def raise(ex)
# @thread.raise(ex)
# end
def backtrace
@thread.backtrace if @thread.is_a?(Thread)
end
def restart
self.stop
self.start
end
def stop
self.state = :stopping
10.times do
break unless self.alive?
Kernel.sleep 1 if self.alive?
end
#
# OK I've had enough now.
#
self.kill if self.alive?
self.join
end
alias exit stop
def kill
self.state = :killing
@thread.kill
self.state = :killed
end
def thread
@thread
end
end
end
|
