function pointer in JNI

[Kay]

Hello, all:

The c library I am using requires passing in a pointer to a user defined
function. I am wondering how to wrap that in JNI. Any help will be
appreciated. Thanks,

-Kay

 

[Gordon Beaton]

The c library I am using requires passing in a pointer to a user
defined function. I am wondering how to wrap that in JNI. Any help
will be appreciated. Thanks,

Wrap what, exactly? As given, your question is rather too vague to
answer without writing an essay on all the potential variations you
could mean. Provide a concrete example, and describe what you're
having problems with.

That said, obviously you have to pass it a pointer to a regular C
function that is visible where you call the c library function:

static int some_function(void)
{
// do stuff
return 0;
}

my_native_method(JNIEnv *env, jobject this)
{
/* pass the function pointer */
c_library_function(some_function);
}

/gordon

 

[kevin]

Hello, all:

The c library I am using requires passing in a pointer to a user defined
function. I am wondering how to wrap that in JNI. Any help will be
appreciated. Thanks,

-Kay

check this page out. It appears to show mappings between java and c types.

http://java.sun.com/docs/books/tutorial/native1.1/integrating/types.html

HTH.