1/*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.providers.contacts.util;
18
19import com.android.internal.util.MemInfoReader;
20
21public final class MemoryUtils {
22    private MemoryUtils() {
23    }
24
25    private static long sTotalMemorySize = -1;
26
27    /**
28     * Returns the amount of RAM available to the Linux kernel, i.e. whatever is left after all the
29     * other chips stake their claim, including GPUs, DSPs, cell radios, and any other greedy chips
30     * (in other words: this is probably less than the "RAM: 1 GB" that was printed on the
31     * box in far too big letters)
32     */
33    public static long getTotalMemorySize() {
34        if (sTotalMemorySize < 0) {
35            MemInfoReader reader = new MemInfoReader();
36            reader.readMemInfo();
37
38            // getTotalSize() returns the "MemTotal" value from /proc/meminfo.
39            sTotalMemorySize = reader.getTotalSize();
40        }
41        return sTotalMemorySize;
42    }
43}
44