ConcurrentWritingTest.java revision 2362
/*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/**
* @test
* @bug 6547241
* @summary Test verifies that concurrent usage of jpeg writer instance
* by number of threads does not cause crash in jpeg library.
* @run main ConcurrentWritingTest
*/
public class ConcurrentWritingTest extends Thread {
static ImageWriter w = null;
static BufferedImage img;
private static int MAX_THREADS = 50;
private static int completeCount = 0;
img = createTestImage();
for (int i = 0; i < MAX_THREADS; i++) {
(new ConcurrentWritingTest()).start();
}
// wait for threads
boolean needWait = true;
while(needWait) {
synchronized(lock) {
}
}
}
public void run() {
try {
w.reset();
} catch (IllegalStateException e) {
} catch (IOException e) {
} catch (Throwable e) {
// Unexpected exception. Test failed.
throw new RuntimeException("Test failed.", e);
} finally {
synchronized(lock) {
completeCount ++;
}
}
}
private static BufferedImage createTestImage() {
int w = 1024;
int h = 768;
BufferedImage img = new
g.setPaint(p);
g.dispose();
return img;
}
}