blob: 87d2e8a6873cd635115ed99c28d4c87500ec9e9a (
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
|
#include "sys9.h"
typedef unsigned long long uvlong;
typedef long long vlong;
typedef unsigned char uchar;
static uvlong order = 0x0001020304050607ULL;
static void
be2vlong(vlong *to, uchar *f)
{
uchar *t, *o;
int i;
t = (uchar*)to;
o = (uchar*)ℴ
for(i = 0; i < 8; i++)
t[o[i]] = f[i];
}
long long
_NSEC(void)
{
uchar b[8];
vlong t;
int opened;
static int fd = -1;
opened = 0;
for(;;) {
if(fd < 0)
if(opened++ ||
(fd = _OPEN("/dev/bintime", OREAD|OCEXEC)) < 0)
return 0;
if(_PREAD(fd, b, sizeof b, 0) == sizeof b)
break; /* leave fd open for future use */
/* short read, perhaps try again */
_CLOSE(fd);
fd = -1;
}
be2vlong(&t, b);
return t;
}
|
