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
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
|
/* @(#)usleep.c 1.19 06/09/13 Copyright 1995-2003 J. Schilling */
#ifndef lint
static char sccsid[] =
"@(#)usleep.c 1.19 06/09/13 Copyright 1995-2003 J. Schilling";
#endif
/*
* Copyright (c) 1995-2003 J. Schilling
*/
/*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License, Version 1.0 only
* (the "License"). You may not use this file except in compliance
* with the License.
*
* See the file CDDL.Schily.txt in this distribution for details.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file CDDL.Schily.txt from this distribution.
*/
#include <schily/mconfig.h>
#define usleep __nothing_ /* prototype in unistd.h may be different */
#include <schily/standard.h>
#include <schily/stdlib.h>
#include <schily/time.h>
#ifdef HAVE_POLL_H
# include <poll.h>
#else
# ifdef HAVE_SYS_POLL_H
# include <sys/poll.h>
# endif
#endif
#ifdef HAVE_SYS_SYSTEMINFO_H
#include <sys/systeminfo.h>
#endif
#include <schily/libport.h>
#undef usleep
#ifndef HAVE_USLEEP
EXPORT int usleep __PR((int usec));
#endif
#ifdef OPENSERVER
/*
* Don't use the usleep() from libc on SCO's OPENSERVER.
* It will kill our processes with SIGALRM.
* SCO has a usleep() prototype in unistd.h, for this reason we
* #define usleep to __nothing__ before including unistd.h
*/
#undef HAVE_USLEEP
#endif
#ifdef apollo
/*
* Apollo sys5.3 usleep is broken. Define a version based on time_$wait.
*/
#include <apollo/base.h>
#include <apollo/time.h>
#undef HAVE_USLEEP
#endif
#if !defined(HAVE_USLEEP)
EXPORT int
usleep(usec)
int usec;
{
#if defined(apollo)
/*
* Need to check apollo before HAVE_SELECT, because Apollo has select,
* but it's time wait feature is also broken :-(
*/
#define HAVE_USLEEP
/*
* XXX Do these vars need to be static on Domain/OS ???
*/
static time_$clock_t DomainDelay;
static status_$t DomainStatus;
/*
* DomainDelay is a 48 bit value that defines how many 4uS periods to
* delay. Since the input value range is 32 bits, the upper 16 bits of
* DomainDelay must be zero. So we just divide the input value by 4 to
* determine how many "ticks" to wait
*/
DomainDelay.c2.high16 = 0;
DomainDelay.c2.low32 = usec / 4;
time_$wait(time_$relative, DomainDelay, &DomainStatus);
#endif /* Apollo */
#if defined(HAVE_SELECT) && !defined(HAVE_USLEEP)
#define HAVE_USLEEP
struct timeval tv;
tv.tv_sec = usec / 1000000;
tv.tv_usec = usec % 1000000;
select(0, 0, 0, 0, &tv);
#endif
#if defined(HAVE_POLL) && !defined(HAVE_USLEEP)
#define HAVE_USLEEP
if (poll(0, 0, usec/1000) < 0)
comerr("poll delay failed.\n");
#endif
/*
* We cannot use nanosleep() until we found a way to check
* separately for nanosleep() in libc and for nanosleep in librt.
*/
#if defined(xxxHAVE_NANOSLEEP) && !defined(HAVE_USLEEP)
#define HAVE_USLEEP
struct timespec ts;
ts.tv_sec = usec / 1000000;
ts.tv_nsec = (usec % 1000000) * 1000;
nanosleep(&ts, 0);
#endif
#if !defined(HAVE_USLEEP)
#define HAVE_USLEEP
sleep((usec+500000)/1000000);
#endif
return (0);
}
#endif
|
