JNIEXPORT jint JNICALL
Java_sun_management_HotspotThread_getInternalThreadCount
  (JNIEnv *env, jobject dummy)
{

  {- -------------------------------------------
  (1) JMM_VM_THREAD_COUNT を引数として, jmm_GetLongAttribute() を呼び出すだけ.
      ---------------------------------------- -}

        jlong count = jmm_interface->GetLongAttribute(env, NULL,
                                                      JMM_VM_THREAD_COUNT);
        return (jint) count;
    }