projects / screensavers / blame
| Commit | Line | Data |
|---|---|---|
| 3144ee8a AT |
1 | /* xscreensaver, Copyright (c) 1992, 1996, 1997, 2003 |
| 2 | * Jamie Zawinski <jwz@jwz.org> | |
| 3 | * | |
| 4 | * Permission to use, copy, modify, distribute, and sell this software and its | |
| 5 | * documentation for any purpose is hereby granted without fee, provided that | |
| 6 | * the above copyright notice appear in all copies and that both that | |
| 7 | * copyright notice and this permission notice appear in supporting | |
| 8 | * documentation. No representations are made about the suitability of this | |
| 9 | * software for any purpose. It is provided "as is" without express or | |
| 10 | * implied warranty. | |
| 11 | */ | |
| 12 | ||
| 13 | #ifdef HAVE_CONFIG_H | |
| 14 | # include "config.h" | |
| 15 | #else /* !HAVE_CONFIG_H */ | |
| 16 | # ifndef NO_SELECT | |
| 17 | # define HAVE_SELECT | |
| 18 | # endif | |
| 19 | #endif /* !HAVE_CONFIG_H */ | |
| 20 | ||
| 21 | #ifdef __STDC__ | |
| 22 | # include <stdlib.h> | |
| 23 | #endif | |
| 24 | ||
| 25 | #ifdef HAVE_UNISTD_H | |
| 26 | # include <unistd.h> | |
| 27 | #endif | |
| 28 | ||
| 29 | #if defined(VMS) | |
| 30 | # include <descrip.h> | |
| 31 | # include <stdio.h> | |
| 32 | # include <lib$routines.h> | |
| 33 | #elif defined(HAVE_SELECT) | |
| 34 | # include <sys/time.h> /* for struct timeval */ | |
| 35 | #endif | |
| 36 | ||
| 37 | ||
| 38 | #ifdef __SCREENHACK_USLEEP_H__ | |
| 39 | ERROR, do not include that here | |
| 40 | #endif | |
| 41 | ||
| 42 | extern void screenhack_usleep (unsigned long usecs); /* suppress warning */ | |
| 43 | ||
| 44 | void | |
| 45 | screenhack_usleep (unsigned long usecs) | |
| 46 | { | |
| 47 | # if defined(VMS) | |
| 48 | float seconds = ((float) usecs)/1000000.0; | |
| 49 | unsigned long int statvms = lib$wait(&seconds); | |
| 50 | ||
| 51 | #elif defined(HAVE_SELECT) | |
| 52 | /* usleep() doesn't exist everywhere, and select() is faster anyway. */ | |
| 53 | struct timeval tv; | |
| 54 | tv.tv_sec = usecs / 1000000L; | |
| 55 | tv.tv_usec = usecs % 1000000L; | |
| 56 | (void) select (0, 0, 0, 0, &tv); | |
| 57 | ||
| 58 | #else /* !VMS && !HAVE_SELECT */ | |
| 59 | /* If you don't have select() or usleep(), I guess you lose... | |
| 60 | Maybe you have napms() instead? Let me know. */ | |
| 61 | usleep (usecs); | |
| 62 | ||
| 63 | #endif /* !VMS && !HAVE_SELECT */ | |
| 64 | } |