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
21 extern "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