blob: 41f989dbbea3bfca9f579b10a1fcf73c7ae80926 (
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
|
/*-------------------------------------------------------------------------
*
* pgsleep.c
* Portable delay handling.
*
*
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/port/pgsleep.c,v 1.2 2004/02/10 04:23:03 tgl Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include <unistd.h>
#include <sys/time.h>
/*
* pg_usleep --- delay the specified number of microseconds.
*
* NOTE: although the delay is specified in microseconds, the effective
* resolution is only 1/HZ, or 10 milliseconds, on most Unixen. Expect
* the requested delay to be rounded up to the next resolution boundary.
*
* On machines where "long" is 32 bits, the maximum delay is ~2000 seconds.
*/
void
pg_usleep(long microsec)
{
if (microsec > 0)
{
#ifndef WIN32
struct timeval delay;
delay.tv_sec = microsec / 1000000L;
delay.tv_usec = microsec % 1000000L;
(void) select(0, NULL, NULL, NULL, &delay);
#else
SleepEx((microsec < 500 ? 1 : (microsec + 500) / 1000), TRUE);
#endif
}
}
|
