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Homework and Emergencies Homework & Coursework Questions Synchronization process Post 302895244 by mariam40 on Sunday 30th of March 2014 04:26:42 AM

03-30-2014

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Synchronization process

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1. The problem statement, all variables and given/known data:

it is assumed that the five processes are available according to the graph (cycle is formed of five process).
each process has two neighboring processes. they would apply ordonnencement (synchronization) of the five processes. if the process Pi execute its function Gi (), neither of these two neighboring process can execute its function. example if the P2 execute G2() function then P1 and P3 should be prevent to execute their functions G1 () and G3 () respectively.
using tubes communications (pipe) write the necessary code this synchronization
2. Relevant commands, code, scripts, algorithms:

3. The attempts at a solution (include all code and scripts):

Code:

 
 /*I used 5 pipes .*/
 int t125[2],t123[2],t234[2],t345[2],t145[2];int x;
 if(i==1)
 {read(t123[0],&x,sizeof(int));
 read(t145[0],&x,sizeof(int));
 G1();
 write(t125[1],&x,sizeof(int));
 write(t125[1],&x,sizeof(int));
 }
 if(i==2)
 {read(t125[0],&x,sizeof(int));
 read(234[0],&x,sizeof(int));
 G2();
 write(t123[1],&x,sizeof(int));
 write(t123[1],&x,sizeof(int));
 }
 if(i==3)
 {read(t123[0],&x,sizeof(int));
 read(t345[0],&x,sizeof(int));
 G3();
 write(t234[1],&x,sizeof(int));
 write(t234[1],&x,sizeof(int));
 }
 if(i==4)
 {read(t234[0],&x,sizeof(int));
 read(t145[0],&x,sizeof(int));
 G4();
 write(t345[1],&x,sizeof(int));
 write(t345[1],&x,sizeof(int));
 }
 if(i==5)
 {read(t125[0],&x,sizeof(int));
 read(t345[0],&x,sizeof(int));
 G5();
 write(t145[1],&x,sizeof(int));
 write(t145[1],&x,sizeof(int));
 }

4. Complete Name of School (University), City (State), Country, Name of Professor, and Course Number (Link to Course):
Lebanese university,beirut,lebanon,sami,Operating system II.

Note: Without school/professor/course information, you will be banned if you post here! You must complete the entire template (not just parts of it).

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debconf-mergetemplate

DEBCONF-MERGETEMPLATE(1)					      Debconf						  DEBCONF-MERGETEMPLATE(1)

NAME

       debconf-mergetemplate - merge together multiple debconf template files

SYNOPSIS

	debconf-mergetemplate [options] [templates.ll ...] templates

DESCRIPTION

       Note: This utility is deprecated. You should switch to using po-debconf's po2debconf program.

       This program is useful if you have multiple debconf templates files which you want to merge together into one big file. All the specified
       files will be read in, merged, and output to standard output.

       This can be especially useful if you are dealing with translated template files. In this case, you might have your main template file, plus
       several other files provided by the translators. These files will have translated fields in them, and maybe the translators left in the
       english versions of the fields they translated, for their reference.

       So, you want to merge together all the translated templates files with your main templates file. Any fields that are unique to the
       translated files need to be added in to the correct templates, but any fields they have in common should be superseded by the fields in the
       main file (which might be more up-to-date).

       This program handles that case properly, just list each of the translated templates files, and then your main templates file last.

OPTIONS

       --outdated
	   Merge in even outdated translations. The default is to drop them with a warning message.

       --drop-old-templates
	   If a translation has an entire template that is not in the master file (and thus is probably an old template), drop that entire
	   template.

SEE ALSO

       debconf-getlang(1)

AUTHOR

       Joey Hess <joeyh@debian.org>

								    2012-09-10						  DEBCONF-MERGETEMPLATE(1)