115 lines
2.8 KiB
Smalltalk
115 lines
2.8 KiB
Smalltalk
"
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(C) 2010-2012 by Holger Hans Peter Freyther
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All Rights Reserved
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU Affero General Public License as
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published by the Free Software Foundation, either version 3 of the
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License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Affero General Public License for more details.
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You should have received a copy of the GNU Affero General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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"
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Object subclass: OsmoUDPSocket [
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| socket queue rx tx net_exit name on_data |
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<category: 'OsmoNetwork-Socket'>
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<comment: 'I help in sending and dispatching UDP messages. I will
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start two processes for socket handling.'>
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OsmoUDPSocket class >> new [
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<category: 'creation'>
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^self basicNew initialize
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]
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initialize [
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<category: 'creation'>
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queue := SharedQueue new.
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net_exit := Semaphore new.
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]
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name: aName [
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<category: 'creation'>
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name := aName
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]
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onData: aBlock [
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<category: 'creation'>
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on_data := aBlock
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]
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start: aSocket [
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<category: 'creation'>
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socket := aSocket.
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"Receive datagrams from the socket..."
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rx := self startRXProcess.
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"Send data to the MGWs"
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tx := [
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[Processor activeProcess name: name, ' TX'.
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self runTXProcess] ensure: [net_exit signal]] fork.
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]
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startRXProcess [
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^ [[Processor activeProcess name: name, ' RX'.
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self runRXProcess] ensure: [net_exit signal]] fork.
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]
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runRXProcess [
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<category: 'processing'>
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[ | data |
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socket ensureReadable.
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socket isOpen ifFalse: [
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^self logNotice: name, ' socket closed.' area: #core].
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data := socket next.
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on_data value: data.
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] repeat.
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]
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runTXProcess [
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<category: 'processing'>
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[ | data |
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data := queue next.
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data = nil ifTrue: [
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^self logNotice: name, ' TX asked to quit.' area: #core].
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socket nextPut: data.
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] repeat.
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]
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stop [
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<category: 'processing'>
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socket ifNil: [^self].
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"Close"
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socket close.
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queue nextPut: nil.
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"Wait for the process to exit"
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self logNotice: name, ' waiting for IO handlers to exit.' area: #core.
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net_exit
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wait;
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wait.
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"Forget things"
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socket := nil.
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tx := nil.
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rx := nil.
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]
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queueData: aData [
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<category: 'sending'>
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queue nextPut: aData
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]
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]
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