Scope of GlobalRef

Question

I was wondering what the scope of a Global reference to an object in JNI. I have read two different references and they seemed to contradict each other.
In the example below would jmanager be visible outside this JNI function??
static jobject jmanager;
JNIEXPORT void JNICALL Java_stuff(JNIEnv *env, jobject obj, jobject jmanager) {
if (jmanager == 0) {
    jclass jlocalRef = env->GetObjectClass(manager)     ;
    if (jlocalRef == 0 ) {
         return -5; //Could not get object.
    }//end if
  jmanager= env->NewGlobalRef(jlocalRef);
  if (jmanager == NULL) {
        return -1; //out of memory;
  }//end if
  }//end if
return 1;
JNIEXPORT void JNICALL Java_useStuff(JNIEnv *env, jobject obj) {
   //Initialize Java object
//**WILL THIS WORK jmanager
  jclass cls = env->GetObjectClass(jmanager);
  //Get and call setNumPoints (JAVA)
  jmethodID mid = env->GetMethodID(cls, "setNumPoints", "(I)V");
  if (mid == NULL) {
     printf("Could not find setNumPoints method");
                     return -1;
   }//end if
   env->CallVoidMethod(routeMgr, mid, pntCount);

Answer 1

Have you tried it out? That code looks ready to run.
Not sure what you mean by "scope" and "visible". In C/C++ language terms, yes that static variable will be in scope and visible from both functions, assuming all are in the same translation unit (file). There's nothing specific to JNI about that.
Of if you are really asking "what is the lifespan of the Java object associated with the jmanager reference variable, after creating the reference via NewGlobalRef?" then the answer is that the object remains alive and ineligible for garbage collection until you later call DeleteGlobalRef on the reference. Hopefully you don't have any documentation indicating otherwise -- it's kinda important!
-slj-