| 1 | /* |
| 2 | * SPDX-License-Identifier: MIT |
| 3 | * |
| 4 | * Copyright (C) 2015-2016 Michael Jeanson <mjeanson@efficios.com> |
| 5 | */ |
| 6 | |
| 7 | #ifndef BABELTRACE_COMPAT_MMAN_H |
| 8 | #define BABELTRACE_COMPAT_MMAN_H |
| 9 | |
| 10 | #ifdef __MINGW32__ |
| 11 | |
| 12 | #include <sys/types.h> |
| 13 | #include "common/macros.h" |
| 14 | |
| 15 | #define PROT_NONE 0x0 |
| 16 | #define PROT_READ 0x1 |
| 17 | #define PROT_WRITE 0x2 |
| 18 | #define PROT_EXEC 0x4 |
| 19 | |
| 20 | #define MAP_FILE 0 |
| 21 | #define MAP_SHARED 1 |
| 22 | #define MAP_PRIVATE 2 |
| 23 | #define MAP_TYPE 0xF |
| 24 | #define MAP_FIXED 0x10 |
| 25 | #define MAP_ANONYMOUS 0x20 |
| 26 | #define MAP_ANON MAP_ANONYMOUS |
| 27 | #define MAP_FAILED ((void *) -1) |
| 28 | |
| 29 | /* |
| 30 | * Note that some platforms (e.g. Windows) do not allow read-only |
| 31 | * mappings to exceed the file's size (even within a page). |
| 32 | */ |
| 33 | BT_EXTERN_C void *bt_mmap(size_t length, int prot, int flags, int fd, |
| 34 | off_t offset, int log_level); |
| 35 | |
| 36 | BT_EXTERN_C int bt_munmap(void *addr, size_t length); |
| 37 | |
| 38 | /* |
| 39 | * On Windows the memory mapping offset must be aligned to the memory |
| 40 | * allocator allocation granularity and not the page size. |
| 41 | */ |
| 42 | BT_EXTERN_C size_t bt_mmap_get_offset_align_size(int log_level); |
| 43 | |
| 44 | #else /* __MINGW32__ */ |
| 45 | |
| 46 | #include <sys/mman.h> |
| 47 | #include "common/common.h" |
| 48 | |
| 49 | static inline |
| 50 | void *bt_mmap(size_t length, int prot, int flags, int fd, |
| 51 | off_t offset, int log_level __attribute__((unused))) |
| 52 | { |
| 53 | return (void *) mmap(NULL, length, prot, flags, fd, offset); |
| 54 | } |
| 55 | |
| 56 | static inline |
| 57 | int bt_munmap(void *addr, size_t length) |
| 58 | { |
| 59 | return munmap(addr, length); |
| 60 | } |
| 61 | |
| 62 | /* |
| 63 | * On other platforms the memory mapping offset must be aligned to the |
| 64 | * page size. |
| 65 | */ |
| 66 | static inline |
| 67 | size_t bt_mmap_get_offset_align_size(int log_level) |
| 68 | { |
| 69 | return bt_common_get_page_size(log_level); |
| 70 | } |
| 71 | #endif /* __MINGW32__ */ |
| 72 | |
| 73 | #ifndef MAP_ANONYMOUS |
| 74 | # ifdef MAP_ANON |
| 75 | # define MAP_ANONYMOUS MAP_ANON |
| 76 | # endif |
| 77 | #endif |
| 78 | |
| 79 | #endif /* BABELTRACE_COMPAT_MMAN_H */ |