blob: 72f818befeec1165a4254ae7ddd410649c22701d (
plain)
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
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
|
/*
** 2004 May 22
**
** The author disclaims copyright to this source code. In place of
** a legal notice, here is a blessing:
**
** May you do good and not evil.
** May you find forgiveness for yourself and forgive others.
** May you share freely, never taking more than you give.
**
******************************************************************************
**
** This header file defined OS-specific features for Unix.
*/
#ifndef _SQLITE_OS_UNIX_H_
#define _SQLITE_OS_UNIX_H_
/*
** Helpful hint: To get this to compile on HP/UX, add -D_INCLUDE_POSIX_SOURCE
** to the compiler command line.
*/
/*
** These #defines should enable >2GB file support on Posix if the
** underlying operating system supports it. If the OS lacks
** large file support, or if the OS is windows, these should be no-ops.
**
** Large file support can be disabled using the -DSQLITE_DISABLE_LFS switch
** on the compiler command line. This is necessary if you are compiling
** on a recent machine (ex: RedHat 7.2) but you want your code to work
** on an older machine (ex: RedHat 6.0). If you compile on RedHat 7.2
** without this option, LFS is enable. But LFS does not exist in the kernel
** in RedHat 6.0, so the code won't work. Hence, for maximum binary
** portability you should omit LFS.
**
** Similar is true for MacOS. LFS is only supported on MacOS 9 and later.
*/
#ifndef SQLITE_DISABLE_LFS
# define _LARGE_FILE 1
# ifndef _FILE_OFFSET_BITS
# define _FILE_OFFSET_BITS 64
# endif
# define _LARGEFILE_SOURCE 1
#endif
/*
** standard include files.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
/*
** The OsFile structure is a operating-system independing representation
** of an open file handle. It is defined differently for each architecture.
**
** This is the definition for Unix.
**
** OsFile.locktype takes one of the values SHARED_LOCK, RESERVED_LOCK,
** PENDING_LOCK or EXCLUSIVE_LOCK.
*/
typedef struct OsFile OsFile;
struct OsFile {
struct Pager *pPager; /* The pager that owns this OsFile. Might be 0 */
struct openCnt *pOpen; /* Info about all open fd's on this inode */
struct lockInfo *pLock; /* Info about locks on this inode */
int h; /* The file descriptor */
unsigned char locktype; /* The type of lock held on this fd */
unsigned char isOpen; /* True if needs to be closed */
int dirfd; /* File descriptor for the directory */
};
/*
** Maximum number of characters in a temporary file name
*/
#define SQLITE_TEMPNAME_SIZE 200
/*
** Minimum interval supported by sqlite3OsSleep().
*/
#if defined(HAVE_USLEEP) && HAVE_USLEEP
# define SQLITE_MIN_SLEEP_MS 1
#else
# define SQLITE_MIN_SLEEP_MS 1000
#endif
#endif /* _SQLITE_OS_UNIX_H_ */
|
