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
|
--
-- This file is part of lem-streams.
-- Copyright 2011 Emil Renner Berthing
--
-- lem-streams is free software: you can redistribute it and/or
-- modify it under the terms of the GNU General Public License as
-- published by the Free Software Foundation, either version 3 of
-- the License, or (at your option) any later version.
--
-- lem-streams is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU General Public License for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with lem-streams. If not, see <http://www.gnu.org/licenses/>.
--
local utils = require 'lem.utils'
local setmetatable = setmetatable
local thisthread, suspend, resume
= utils.thisthread, utils.suspend, utils.resume
local QOStream = {}
QOStream.__index = QOStream
function QOStream:closed(...)
return self.stream:closed(...)
end
function QOStream:interrupt(...)
return self.stream:interrupt(...)
end
function QOStream:close(...)
return self.stream:close(...)
end
function QOStream:write(...)
local nxt = self.next
if nxt == 0 then
nxt = 1
self.next = 1
else
local me = nxt
self[me] = thisthread()
nxt = #self+1
self.next = nxt
suspend()
self[me] = nil
end
local ok, err = self.stream:write(...)
nxt = self[nxt]
if nxt then
resume(nxt)
else
self.next = 0
end
if not ok then return nil, err end
return ok
end
local function wrap(stream, ...)
if not stream then return stream, ... end
return setmetatable({ stream = stream, next = 0 }, QOStream)
end
return {
QOStream = QOStream,
wrap = wrap,
}
-- vim: set ts=2 sw=2 noet:
|
