1 /*
   2  * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
   3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4  *
   5  * This code is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License version 2 only, as
   7  * published by the Free Software Foundation.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 /*
  25  * Native support for TestPeriodicCollectionJNI test.
  26  */
  27 
  28 #include "jni.h"
  29 
  30 #ifdef WINDOWS
  31 #include <windows.h>
  32 #else
  33 #include <unistd.h>
  34 #endif
  35 
  36 #ifdef __cplusplus
  37 extern "C" {
  38 #endif
  39 
  40 static volatile int release_critical = 0;
  41 
  42 JNIEXPORT jboolean JNICALL
  43 Java_gc_g1_TestPeriodicCollectionJNI_blockInNative(JNIEnv* env, jobject obj, jintArray dummy) {
  44     void* native_array = (*env)->GetPrimitiveArrayCritical(env, dummy, 0);
  45 
  46     if (native_array == NULL) {
  47         return JNI_FALSE;
  48     }
  49 
  50     while (!release_critical) {
  51 #ifdef WINDOWS
  52         Sleep(1);
  53 #else
  54         usleep(1000);
  55 #endif
  56     }
  57 
  58     (*env)->ReleasePrimitiveArrayCritical(env, dummy, native_array, 0);
  59 
  60     return JNI_TRUE;
  61 }
  62 
  63 JNIEXPORT void JNICALL Java_gc_g1_TestPeriodicCollectionJNI_unblock(JNIEnv *env, jobject obj)
  64 {
  65     release_critical = 1;
  66 }
  67 
  68 #ifdef __cplusplus
  69 }
  70 #endif
  71