1/*
2 * Copyright (C) 2012-2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
14 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
15 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
17 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
18 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
19 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
20 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
21 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
22 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
23 * THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include "BPlatform.h"
29#include "Sizes.h"
30
31namespace bmalloc {
32
33size_t availableMemory();
34
35#if BPLATFORM(IOS_FAMILY) || BOS(LINUX)
36struct MemoryStatus {
37 MemoryStatus(size_t memoryFootprint, double percentAvailableMemoryInUse)
38 : memoryFootprint(memoryFootprint)
39 , percentAvailableMemoryInUse(percentAvailableMemoryInUse)
40 {
41 }
42
43 size_t memoryFootprint;
44 double percentAvailableMemoryInUse;
45};
46
47MemoryStatus memoryStatus();
48
49inline size_t memoryFootprint()
50{
51 auto memoryUse = memoryStatus();
52 return memoryUse.memoryFootprint;
53}
54
55inline double percentAvailableMemoryInUse()
56{
57 auto memoryUse = memoryStatus();
58 return memoryUse.percentAvailableMemoryInUse;
59}
60#endif
61
62inline bool isUnderMemoryPressure()
63{
64#if BPLATFORM(IOS_FAMILY) || BOS(LINUX)
65 return percentAvailableMemoryInUse() > memoryPressureThreshold;
66#else
67 return false;
68#endif
69}
70
71} // namespace bmalloc
72