Package org.jcsp.plugNplay.ints
Class Plex2Int
java.lang.Object
org.jcsp.plugNplay.ints.Plex2Int
- All Implemented Interfaces:
CSProcess
Fair multiplexes two integer streams into one.
Process Diagram
in0 __________ -->--| | out in1 | Plex2Int |-->-- -->--|__________|
Description
Plex2Int is a process whose output stream is a fair multiplexing of its input streams. It makes no assumptions about the traffic patterns occuring on the input streams and ensures that no input stream will be starved by busy siblings. It guarantees that if an input stream has data pending, no other stream will be serviced twice before that data is serviced.Channel Protocols
Input Channels | ||
---|---|---|
in0, in1 | int | The input streams. |
Output Channels | ||
out | int | The multiplexed output stream. |
Example
The following example shows how to use Plex2Int in a small program. The program also uses some of the other plugNplay processes.import org.jcsp.lang.*; import org.jcsp.plugNplay.ints.*; public class Plex2IntExample { public static void main (String[] argv) { final One2OneChannelInt a = Channel.one2oneInt (); final One2OneChannelInt b = Channel.one2oneInt (); final One2OneChannelInt c = Channel.one2oneInt (); new Parallel ( new CSProcess[] { new FibonacciInt (a.out ()), new SquaresInt (b.out ()), new Plex2Int (a.in (), b.in (), c.out ()), new PrinterInt (c.in (), "--> ", "\n") } ).run (); } }Note: this example does not produce easily understandable output, since the multiplexed stream contains only numbers -- there is no indication of the streams from which they were sourced. To get that indication, we can either use
MultiplexInt
or sign each int
stream to be multiplexed with SignInt
and multiplex with
Plex2
.
Implemntation Note
For information, here is the run method for this process:public void run () { AltingChannelInputInt[] input = {in0, in1}; // in0 and in1 are the input channels Alternative alt = new Alternative (input); while (true) { out.write (input[alt.fairSelect ()].read ()); // out is the output channel } }
- See Also:
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Field Summary
FieldsModifier and TypeFieldDescriptionprivate final AltingChannelInputInt
The first input Channelprivate final AltingChannelInputInt
The second input Channelprivate final ChannelOutputInt
The output Channel -
Constructor Summary
ConstructorsConstructorDescriptionPlex2Int
(AltingChannelInputInt in0, AltingChannelInputInt in1, ChannelOutputInt out) Construct a new Plex2Int process with the input channels in0 and in1 and the output channel out. -
Method Summary
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Field Details
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in0
The first input Channel -
in1
The second input Channel -
out
The output Channel
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Constructor Details
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Plex2Int
Construct a new Plex2Int process with the input channels in0 and in1 and the output channel out. The ordering of the input channels makes no difference to the behaviour of this process.- Parameters:
in0
- an input channelin1
- an input channelout
- the output channel
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Method Details