how to call c functions from tcl script

monikagoyal · 05-01-2012, 12:34 AM

Hi

I am using ns2.35.
There are some functions in god.cc files which i want to use in my tcl script.
I dont know how to call these functions or how to link them in tcl file.
Please suggest any idea for calling these functions from tcl file.
Thanks

Tinkster · 05-01-2012, 01:30 AM

Does this help?

monikagoyal · 05-01-2012, 01:42 AM

Thanks sir for trying to help.
But it is something different.
In ur advised link it is about some back end processing of c functions.
I want to call the functions which are already defined in god.cc file.

Tinkster · 05-01-2012, 03:06 PM

How about this, then?

monikagoyal · 05-01-2012, 03:21 PM

sir i want to use that tcl script in ns2.
bt the critcl file cannot be used in ns2.

Tinkster · 05-01-2012, 03:48 PM

Let's start at the beginning. You have a file called 'god.cc'. Considering the
extension I'll assume it to be a piece of C++ source. To use it from Tcl you'll
need to a) compile it, and b) tell Tcl about the newly compiled object/library
files existence. The 2nd link I provided does exactly that (I think).

What is your problem?

Cheers,
Tink

P.S.: This is more suitable in PROGRAMMING, so I'm moving it over there.

knudfl · 05-01-2012, 11:12 PM

The most used way to use a new "god.cc" in ns2
is to compile the stuff into the binary 'ns'.

Add god.o to the Makefile.in, section OBJ_CC.
Reconfigure to get a new Makefile, and run 'make'.
( god.o can also be added to the Makefile.
Then just run 'make'.)

It is a good idea to save a copy of the original 'ns' as ns-orig.
The new ns may not be usable with the most default tcl scripts.

.

monikagoyal · 05-01-2012, 11:39 PM

Hi
I m not changing god.cc file.
The functionality that i want is already there.
I want to find whether two nodes are neighbor or not.
A function named isNeighbor is there in god.cc.
But how to call this function from my tcl script is the problem.
I hope problem is explained now.
Thanks.

knudfl · 05-02-2012, 12:27 AM

OK, you are right, god.o is already compiled into ns.
( Makefile, line 257: mac/arp.o mobile/god.o mobile/dem.o ).

Files.cc are not used in an ns2 simulation. Never.
All functions in the 451 files.cc are compiled into the binary 'ns'.

So it's just a matter of writing a tcl script with the functionality you want.

Examples : Google .. isNeighbor ns2 ..
http://old.nabble.com/How-to-calcula...d28494220.html
etc. etc.

.

monikagoyal · 05-02-2012, 12:33 AM

ok
it means we cant use these functions in tcl.
We have to write that functionality in tcl itself.
Thanks sir for your guidance.
It helps a lot.