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
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
|
--!A cross-platform build utility based on Lua
--
-- Licensed under the Apache License, Version 2.0 (the "License");
-- you may not use this file except in compliance with the License.
-- You may obtain a copy of the License at
--
-- http://www.apache.org/licenses/LICENSE-2.0
--
-- Unless required by applicable law or agreed to in writing, software
-- distributed under the License is distributed on an "AS IS" BASIS,
-- WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-- See the License for the specific language governing permissions and
-- limitations under the License.
--
-- Copyright (C) 2015-2020, TBOOX Open Source Group.
--
-- @author ruki
-- @file poller.lua
--
-- define module
local poller = poller or {}
-- load modules
local io = require("base/io")
local string = require("base/string")
-- the poller object type
poller.OT_SOCK = 1
poller.OT_PROC = 2
poller.OT_PIPE = 3
-- the poller events, @see tbox/platform/poller.h
poller.EV_SOCK_RECV = 1
poller.EV_SOCK_SEND = 2
poller.EV_SOCK_CONN = poller.EV_SOCK_SEND
poller.EV_SOCK_ACPT = poller.EV_SOCK_RECV
poller.EV_SOCK_CLEAR = 0x0010 -- edge trigger. after the event is retrieved by the user, its state is reset
poller.EV_SOCK_ONESHOT = 0x0010 -- causes the event to return only the first occurrence of the filter being triggered
poller.EV_SOCK_EOF = 0x0100 -- the event flag will be marked if the connection be closed in the edge trigger
poller.EV_SOCK_ERROR = 0x0200 -- socket error after waiting
-- get socket data
function poller:_sockdata(csock)
return self._SOCKDATA and self._SOCKDATA[csock] or nil
end
-- set socket data
function poller:_sockdata_set(csock, data)
local sockdata = self._SOCKDATA
if not sockdata then
sockdata = {}
self._SOCKDATA = sockdata
end
sockdata[csock] = data
end
-- insert socket events to poller
function poller:_insert_sock(sock, events, udata)
-- ensure opened
local ok, errors = sock:_ensure_opened()
if not ok then
return false, errors
end
-- insert it
if not io.poller_insert(sock:csock(), events) then
return false, string.format("%s: insert events(%d) to poller failed!", sock, events)
end
-- save socket data and save sock/ref for gc
self:_sockdata_set(sock:csock(), {sock, udata})
return true
end
-- modify socket events in poller
function poller:_modify_sock(sock, events, udata)
-- ensure opened
local ok, errors = sock:_ensure_opened()
if not ok then
return false, errors
end
-- modify it
if not io.poller_modify(sock:csock(), events) then
return false, string.format("%s: modify events(%d) to poller failed!", sock, events)
end
-- update socket data for this socket
self:_sockdata_set(sock:csock(), {sock, udata})
return true
end
-- remove socket from poller
function poller:_remove_sock(sock)
-- ensure opened
local ok, errors = sock:_ensure_opened()
if not ok then
return false, errors
end
-- remove it
if not io.poller_remove(sock:csock()) then
return false, string.format("%s: remove events from poller failed!", sock)
end
-- remove socket data for this socket
self:_sockdata_set(sock, nil)
return true
end
-- support events?
function poller:support(otype, events)
if otype == poller.OT_SOCK then
return io.poller_support(events)
end
return false, string.format("invalid poller object type(%d)!", otype)
end
-- spank poller to break the wait() and return all triggered events
function poller:spank()
io.poller_spank()
end
-- insert object events to poller
function poller:insert(otype, obj, events, udata)
if otype == poller.OT_SOCK then
return self:_insert_sock(obj, events, udata)
end
return false, string.format("invalid poller object type(%d)!", otype)
end
-- modify object events in poller
function poller:modify(otype, obj, events, udata)
if otype == poller.OT_SOCK then
return self:_modify_sock(obj, events, udata)
end
return false, string.format("invalid poller object type(%d)!", otype)
end
-- remove socket from poller
function poller:remove(otype, obj)
if otype == poller.OT_SOCK then
return self:_remove_sock(obj)
end
return false, string.format("invalid poller object type(%d)!", otype)
end
-- wait socket events in poller
function poller:wait(timeout)
-- wait it
local events, count = io.poller_wait(timeout or -1)
if count < 0 then
return -1, "wait events in poller failed!"
end
-- check count
if count > 0 and count ~= #events then
return -1, string.format("events(%d) != %d in poller!", #events, count)
end
-- wrap socket
local results = {}
if events then
for _, v in ipairs(events) do
-- TODO only socket events now. It will be proc/pipe events in the future
local csock = v[1]
local sockevents = v[2]
local sockdata = self:_sockdata(csock)
if not sockdata then
return -1, string.format("no socket data for csock(%d)!", csock)
end
table.insert(results, {poller.OT_SOCK, sockdata[1], sockevents, sockdata[2]})
end
end
return count, results
end
-- return module
return poller
|
