Commit | Line | Data |
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d8525fbd JA |
1 | #ifndef SPLICE_H |
2 | #define SPLICE_H | |
3 | ||
4 | #if defined(__i386__) | |
5 | #define __NR_splice 313 | |
6 | #define __NR_tee 315 | |
7 | #elif defined(__x86_64__) | |
8 | #define __NR_splice 275 | |
9 | #define __NR_tee 276 | |
10 | #elif defined(__powerpc__) || defined(__powerpc64__) | |
11 | #define __NR_splice 283 | |
12 | #define __NR_tee 284 | |
13 | #elif defined(__ia64__) | |
14 | #define __NR_splice 1297 | |
15 | #define __NR_tee 1301 | |
16 | #else | |
17 | #error unsupported arch | |
18 | #endif | |
19 | ||
20 | #define SPLICE_F_MOVE (0x01) /* move pages instead of copying */ | |
21 | #define SPLICE_F_NONBLOCK (0x02) /* don't block on the pipe splicing (but */ | |
22 | /* we may still block on the fd we splice */ | |
23 | /* from/to, of course */ | |
24 | #define SPLICE_F_MORE (0x04) /* expect more data */ | |
25 | ||
26 | static inline int splice(int fdin, loff_t *off_in, int fdout, loff_t *off_out, | |
27 | size_t len, unsigned long flags) | |
28 | { | |
29 | return syscall(__NR_splice, fdin, off_in, fdout, off_out, len, flags); | |
30 | ||
31 | } | |
32 | ||
33 | static inline int tee(int fdin, int fdout, size_t len, unsigned int flags) | |
34 | { | |
35 | return syscall(__NR_tee, fdin, fdout, len, flags); | |
36 | } | |
37 | ||
38 | #define SPLICE_SIZE (64*1024) | |
39 | ||
40 | #define BUG_ON(c) assert(!(c)) | |
41 | ||
42 | #define min(x,y) ({ \ | |
43 | typeof(x) _x = (x); \ | |
44 | typeof(y) _y = (y); \ | |
45 | (void) (&_x == &_y); \ | |
46 | _x < _y ? _x : _y; }) | |
47 | ||
48 | #define max(x,y) ({ \ | |
49 | typeof(x) _x = (x); \ | |
50 | typeof(y) _y = (y); \ | |
51 | (void) (&_x == &_y); \ | |
52 | _x > _y ? _x : _y; }) | |
53 | ||
54 | static inline int error(const char *n) | |
55 | { | |
56 | perror(n); | |
57 | return -1; | |
58 | } | |
59 | ||
60 | #endif |