1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
| | #ifndef OS_COMPAT_H
#define OS_COMPAT_H
#define _LARGE_FILES
#define _FILE_OFFSET_BITS 64
#define _BSD_SOURCE /* for mincore */
#define _XOPEN_SOURCE 600 /* for posix_fadvise */
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <assert.h>
#ifndef O_NOATIME
# define O_NOATIME 0
#endif /* O_NOATIME */
#define PAGE_MASK (~(page_size() -1))
#define PAGE_ALIGN(addr) (((addr) + page_size() - 1) & PAGE_MASK)
#define PAGE_ALIGN_DOWN(addr) \
(addr > page_size() ? PAGE_ALIGN(addr) - page_size() : 0)
static inline size_t page_size(void)
{
static size_t size;
if (!size)
size = sysconf(_SC_PAGESIZE);
return size;
}
#define ARRAY_SIZE(x) (sizeof(x)/sizeof(x[0]))
#endif /* OS_COMPAT_H */
|