1/*
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#ifndef OHOS_UTILS_MEMORY_LIBPURGEABLEMEM_COMMON_INCLUDE_PM_UTIL_H
17#define OHOS_UTILS_MEMORY_LIBPURGEABLEMEM_COMMON_INCLUDE_PM_UTIL_H
18
19#ifdef __cplusplus
20#if __cplusplus
21extern "C" {
22#endif /* End of #if __cplusplus */
23#endif /* End of #ifdef __cplusplus */
24
25/*
26 * USE_UXPT > 0 means enable uxpt(using uxpt) in libpurgeable,
27 * while USE_UXPT == 0 means not using uxpt, 0 will be used in the following cases:
28 * case 1: if there is no purgeable mem module in kernel.
29 * case 2: if you want close libpurgeable, meanwhile doesn't affect user programs.
30 */
31#define USE_UXPT 1
32
33#define MAP_PURGEABLE 0x04
34#define MAP_USEREXPTE 0x08
35
36#define PAGE_SHIFT 12
37#ifdef PAGE_SIZE
38#undef PAGE_SIZE
39#endif
40#define PAGE_SIZE (1 << PAGE_SHIFT)
41
42/*
43 * When UXPT is not used, In order not to affect the normal function
44 * of user programs, this lib will provide normal anon memory. So
45 * MAP_PURGEABLE is set to 0x0.
46 */
47#if !defined(USE_UXPT) || (USE_UXPT == 0)
48#undef MAP_PURGEABLE
49#define MAP_PURGEABLE 0x0
50#undef MAP_USEREXPTE
51#define MAP_USEREXPTE 0x0
52#endif
53
54#ifdef __cplusplus
55#if __cplusplus
56}
57#endif /* End of #if __cplusplus */
58#endif /* End of #ifdef __cplusplus */
59
60#endif /* OHOS_UTILS_MEMORY_LIBPURGEABLEMEM_COMMON_INCLUDE_PM_UTIL_H */
61