An example of a Java application calling C, and the C calling Java methods?

From: Clayton E. Cramer (clayton_at_claytonDELETETHIScramer.com)
Date: 07/26/04 

Date: Sun, 25 Jul 2004 23:11:11 -0600

I have been able to use the JNI to write a Java application that calls C
functions, but I am having a heck of a time getting the C functions to
reliably call Java methods. I believe that the problem has to do with
multiple threads and not having the correct value for the JNIEnv when the C
function decides to invoke a Java method. There must be some way for a C
function to retrieve the current JNIEnv that invoked this C function,
without passing it in.

Please?

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