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663996b3 MS |
1 | /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ |
2 | ||
3 | #pragma once | |
4 | ||
5 | /*** | |
6 | This file is part of systemd. | |
7 | ||
8 | Copyright 2012 Lennart Poettering | |
9 | ||
10 | systemd is free software; you can redistribute it and/or modify it | |
11 | under the terms of the GNU Lesser General Public License as published by | |
12 | the Free Software Foundation; either version 2.1 of the License, or | |
13 | (at your option) any later version. | |
14 | ||
15 | systemd is distributed in the hope that it will be useful, but | |
16 | WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
18 | Lesser General Public License for more details. | |
19 | ||
20 | You should have received a copy of the GNU Lesser General Public License | |
21 | along with systemd; If not, see <http://www.gnu.org/licenses/>. | |
22 | ***/ | |
23 | ||
663996b3 MS |
24 | #include <stdbool.h> |
25 | #include <sys/stat.h> | |
26 | ||
e735f4d4 MP |
27 | /* One context per object type, plus one of the header, plus one "additional" one */ |
28 | #define MMAP_CACHE_MAX_CONTEXTS 9 | |
29 | ||
663996b3 MS |
30 | typedef struct MMapCache MMapCache; |
31 | ||
32 | MMapCache* mmap_cache_new(void); | |
33 | MMapCache* mmap_cache_ref(MMapCache *m); | |
34 | MMapCache* mmap_cache_unref(MMapCache *m); | |
35 | ||
60f067b4 JS |
36 | int mmap_cache_get( |
37 | MMapCache *m, | |
38 | int fd, | |
39 | int prot, | |
40 | unsigned context, | |
41 | bool keep_always, | |
42 | uint64_t offset, | |
43 | size_t size, | |
44 | struct stat *st, | |
e735f4d4 | 45 | void **ret); |
663996b3 | 46 | void mmap_cache_close_fd(MMapCache *m, int fd); |
60f067b4 JS |
47 | |
48 | unsigned mmap_cache_get_hit(MMapCache *m); | |
49 | unsigned mmap_cache_get_missed(MMapCache *m); | |
e735f4d4 MP |
50 | |
51 | bool mmap_cache_got_sigbus(MMapCache *m, int fd); |