01: /*
02: * Licensed to the Apache Software Foundation (ASF) under one or more
03: * contributor license agreements. See the NOTICE file distributed with
04: * this work for additional information regarding copyright ownership.
05: * The ASF licenses this file to You under the Apache License, Version 2.0
06: * (the "License"); you may not use this file except in compliance with
07: * the License. You may obtain a copy of the License at
08: *
09: * http://www.apache.org/licenses/LICENSE-2.0
10: *
11: * Unless required by applicable law or agreed to in writing, software
12: * distributed under the License is distributed on an "AS IS" BASIS,
13: * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14: * See the License for the specific language governing permissions and
15: * limitations under the License.
16: */
17:
18: package org.apache.harmony.luni.platform;
19:
20: public class OSResourcesMonitor {
21: private static final int MAX_ITERATION_TIMES = 2;
22:
23: private static final int SLEEP_TIME = 50;
24:
25: public static void ensurePhysicalMemoryCapacity() {
26: if (!isSystemPhysicalMemoryLow()) {
27: return;
28: }
29: synchronized (OSResourcesMonitor.class) {
30: int iteration = 0;
31: while (isSystemPhysicalMemoryLow()) {
32: if (iteration > MAX_ITERATION_TIMES) {
33: return;
34: }
35: iteration++;
36: System.gc();
37: try {
38: Thread.sleep(SLEEP_TIME);
39: } catch (InterruptedException e) {
40:
41: }
42: }
43: }
44: }
45:
46: private native static boolean isSystemPhysicalMemoryLow();
47: }
|