| 860 |
|
|
| 861 |
|
/* |
| 862 |
|
* Delay by specified number of microseconds (<1 second) |
| 863 |
< |
* (adapted from SDL_Delay() source) |
| 863 |
> |
* (adapted from SDL_Delay() source; this function is designed to provide |
| 864 |
> |
* the highest accuracy possible) |
| 865 |
|
*/ |
| 866 |
|
|
| 867 |
|
void Delay_usec(uint32 usec) |
| 868 |
|
{ |
| 869 |
|
int was_error; |
| 870 |
< |
#ifndef __linux__ // Non-Linux implementations need to calculate time left |
| 870 |
> |
|
| 871 |
> |
#if defined(linux) |
| 872 |
> |
struct timeval tv; |
| 873 |
> |
#elif defined(__FreeBSD__) || defined(sgi) |
| 874 |
> |
struct timespec elapsed, tv; |
| 875 |
> |
#else // Non-Linux implementations need to calculate time left |
| 876 |
|
uint64 then, now, elapsed; |
| 877 |
|
#endif |
| 872 |
– |
struct timeval tv; |
| 878 |
|
|
| 879 |
|
// Set the timeout interval - Linux only needs to do this once |
| 880 |
< |
#ifdef __linux__ |
| 880 |
> |
#if defined(linux) |
| 881 |
|
tv.tv_sec = 0; |
| 882 |
|
tv.tv_usec = usec; |
| 883 |
+ |
#elif defined(__FreeBSD__) |
| 884 |
+ |
elapsed.tv_sec = 0; |
| 885 |
+ |
elapsed.tv_nsec = usec * 1000; |
| 886 |
|
#else |
| 887 |
|
then = GetTicks_usec(); |
| 888 |
|
#endif |
| 889 |
|
do { |
| 890 |
|
errno = 0; |
| 891 |
< |
#ifndef __linux__ |
| 891 |
> |
#if !defined(linux) && !defined(__FreeBSD__) && !defined(sgi) |
| 892 |
|
/* Calculate the time interval left (in case of interrupt) */ |
| 893 |
|
now = GetTicks_usec(); |
| 894 |
|
elapsed = now - then; |
| 899 |
|
tv.tv_sec = 0; |
| 900 |
|
tv.tv_usec = usec; |
| 901 |
|
#endif |
| 902 |
+ |
#if defined(__FreeBSD__) || defined(sgi) |
| 903 |
+ |
tv.tv_sec = elapsed.tv_sec; |
| 904 |
+ |
tv.tv_nsec = elapsed.tv_nsec; |
| 905 |
+ |
was_error = nanosleep(&tv, &elapsed); |
| 906 |
+ |
#else |
| 907 |
|
was_error = select(0, NULL, NULL, NULL, &tv); |
| 908 |
+ |
#endif |
| 909 |
|
} while (was_error && (errno == EINTR)); |
| 910 |
|
} |
| 911 |
|
|
