osd-contiki/tools/cooja/examples/jni_test/level4/level4.c

57 lines
2.3 KiB
C

/*
* Copyright (c) 2006, Swedish Institute of Computer Science.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id: level4.c,v 1.3 2008/11/20 16:22:28 fros4943 Exp $
*/
#include <jni.h>
#include <stdio.h>
long ref_var; /* Placed somewhere in the BSS section */
int initialized_counter=1; /* Variable in data section */
int uninitialized_counter; /* Variable in BSS section */
JNIEXPORT void JNICALL
Java_Level4_setReferenceAddress(JNIEnv *env, jobject obj, jint addr)
{
/*printf("relative reference address is %p\n", addr);*/
/*printf("absolute reference address is %p\n", &ref_var);*/
ref_var = (((long)&ref_var) - ((long)addr));
printf("Offset is 0x%p\n", ref_var);
fflush(stdout);
}
JNIEXPORT void JNICALL
Java_Level4_doCount(JNIEnv *env, jobject obj)
{
printf(">> DATA_counter=\t%i\tBSS_counter=\t%i\n", initialized_counter++, uninitialized_counter++);
fflush(stdout);
}