How to load seprate .so module in js program

[sachin Chaudhary]

hi all 

can any tell how i will be able to add a  .so module to javascript program

******************* foo.h ***************

#ifndef foo_h__

#define foo_h__

 

extern void foo(void);

 

#endif  // foo_h__

******************** foo.c ************

#include <stdio.h>

 

 

void foo(void)

{

    puts("Hello, I'm a shared library");

}

now i make jsfoo.so 

and using LoadModule  try to load this module in js program just to call c function in javascript

var loadModule = host.loadModule;

loadModule('jsfoo');

loadModule('jsstd');

var msg=foo();

print(msg);

now i run this file with  jshost then this throws error  " InternalError: module 'jsfoo.so' fails to initialize "

can anyone tell me the procedure to add seprate .so to js program i am using fedora13

thanks in advance

 

[soubok]

Hello Sachin,

If you want to create a new module, I recommend you to have a look at the module template (jslibs/src/jslibs_module_template).

For more complete example, you can also have a look at existing modules like jsstd. The file jslibs/src/jsstd/static.cpp show you how to expose simple c/c++ functions to the JavaScript engine.

eg.

******************** foo.c ************

#include "stdafx.h"

#include <jslibsModule.h>

#include <stdio.h>

DEFINE_FUNCTION( foo ) {

puts("Hello, I'm a shared library");

// ...

return JS_TRUE;

}

CONFIGURE_STATIC

BEGIN_STATIC_FUNCTION_SPEC

FUNCTION_ARGC( foo, 0 )

END_STATIC_FUNCTION_SPEC

END_STATIC

HIH,

Franck.

 

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[sachin Chaudhary]

Thanks Franck for your response

can you tell me one more thing . how i will be able to take input from console in .js program ( like in c program we take input from console using scanf or gets )

[soubok]

The latest jslibs source code has a  host.stdin()  function that returns a string.

Thanks,

Franck.

[sachin Chaudhary]

thanks frank , for your valuable advice 

i created a test program to call jshost main again and again i created jshost.a and renamed it's main 

there is one problem with jslang when i call jshost 2nd time then that gives segmentation fault....... due to memory leak.

that is due to jslang

that comes when INIT_STATIC() is called inside  jslangmoduleinit from here call goes to 

commons/jlclass.h function 

InitStatic( JSContext *cx, JSObject *obj, ClassSpec *cs ) {

JL_CHK(obj);

printf("cs_static_fs = %x\n",cs->static_fs);

 when i call jslang 2nd time this print gives segmentation fault ......  can you suggest which part need correction ??????????

is Classspec structure pointer creating problem...........

On Tuesday, 9 April 2013 16:34:20 UTC+5:30, sachin Chaudhary wrote: