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
|
--
-- FIFO.LUA
--
-- Sample program for Lua Lanes
--
local lanes = require "lanes".configure{shutdown_timeout=3,with_timers=true}
local atomic_linda = lanes.linda( "atom")
local atomic_inc= lanes.genatomic( atomic_linda, "FIFO_n")
local fifo_linda = lanes.linda( "fifo")
-- Lua 5.1 support
local table_unpack = table.unpack or unpack
assert( atomic_inc()==1)
assert( atomic_inc()==2)
local function FIFO()
local my_channel= "FIFO_"..atomic_inc()
return {
-- Giving explicit 'nil' timeout allows numbers to be used as 'my_channel'
--
send = function(self, ...)
fifo_linda:send( nil, my_channel, ...)
end,
receive = function(self, timeout)
return fifo_linda:receive( timeout, my_channel)
end,
channel = my_channel
}
end
local A = FIFO()
local B = FIFO()
print "Sending to A.."
A:send( 1,2,3,4,5)
print "Sending to B.."
B:send( 'a','b','c')
print "Dumping linda stats.. [1]" -- count everything
local stats = fifo_linda:count()
for key,count in pairs(stats) do
print("channel " .. key .. " contains " .. count .. " entries.")
-- print(i, key_count[1], key_count[2])
end
print "Dumping linda stats.. [2]" -- query count for known channels one at a time
print("channel " .. A.channel .. " contains " .. fifo_linda:count(A.channel) .. " entries.")
print("channel " .. B.channel .. " contains " .. fifo_linda:count(B.channel) .. " entries.")
print "Dumping linda stats.. [3]" -- query counts for a predefined list of keys, tossing unknown keys in the mix for good measure
for key,count in pairs(fifo_linda:count("unknown key", A.channel, "unknown key", B.channel, "unknown key", "unknown key")) do
print("channel " .. key .. " contains " .. count .. " entries.")
-- print(i, key_count[1], key_count[2])
end
print "Dumping linda stats.. [4]" -- count everything
for key,contents in pairs(fifo_linda:dump()) do
print("channel " .. key .. ": limit=".. contents.limit, " first=" .. contents.first, " count=" .. contents.count .. " restrict=" .. contents.restrict)
for k,v in pairs(contents.fifo) do
print("[".. k.."] = " .. v)
end
end
print "Reading A.."
print( A:receive( 1.0))
print( A:receive( 1.0))
print( A:receive( 1.0))
print( A:receive( 1.0))
print( A:receive( 1.0))
print "Reading B.."
print( B:receive( 2.0))
print( B:receive( 2.0))
print( B:receive( 2.0))
-- Note: A and B can be passed between threads, or used as upvalues
-- by multiple threads (other parts will be copied but the 'linda'
-- handle is shared userdata and will thus point to the single place)
lanes.timer_lane:cancel() -- hard cancel, 0 timeout
local status, err = lanes.timer_lane:join()
assert(status == nil and err == lanes.cancel_error, "status="..tostring(status).." err="..tostring(err))
print "TEST OK"
|
