| 869 |
|
// Linux select() changes its timeout parameter upon return to contain |
| 870 |
|
// the remaining time. Most other unixen leave it unchanged or undefined. |
| 871 |
|
#define SELECT_SETS_REMAINING |
| 872 |
< |
#elif defined(__FreeBSD__) || defined(__sun__) || defined(sgi) |
| 872 |
> |
#elif defined(__FreeBSD__) || defined(__sun__) |
| 873 |
|
#define USE_NANOSLEEP |
| 874 |
+ |
#elif defined(HAVE_PTHREADS) && defined(sgi) |
| 875 |
+ |
// SGI pthreads has a bug when using pthreads+signals+nanosleep, |
| 876 |
+ |
// so instead of using nanosleep, wait on a CV which is never signalled. |
| 877 |
+ |
#define USE_COND_TIMEDWAIT |
| 878 |
|
#endif |
| 879 |
|
|
| 880 |
|
void Delay_usec(uint32 usec) |
| 881 |
|
{ |
| 882 |
|
int was_error; |
| 883 |
|
|
| 884 |
< |
#ifdef USE_NANOSLEEP |
| 884 |
> |
#if defined(USE_NANOSLEEP) |
| 885 |
|
struct timespec elapsed, tv; |
| 886 |
+ |
#elif defined(USE_COND_TIMEDWAIT) |
| 887 |
+ |
// Use a local mutex and cv, so threads remain independent |
| 888 |
+ |
pthread_cond_t delay_cond = PTHREAD_COND_INITIALIZER; |
| 889 |
+ |
pthread_mutex_t delay_mutex = PTHREAD_MUTEX_INITIALIZER; |
| 890 |
+ |
struct timespec elapsed; |
| 891 |
+ |
uint64 future; |
| 892 |
|
#else |
| 893 |
|
struct timeval tv; |
| 894 |
|
#ifndef SELECT_SETS_REMAINING |
| 897 |
|
#endif |
| 898 |
|
|
| 899 |
|
// Set the timeout interval - Linux only needs to do this once |
| 900 |
< |
#ifdef SELECT_SETS_REMAINING |
| 900 |
> |
#if defined(SELECT_SETS_REMAINING) |
| 901 |
|
tv.tv_sec = 0; |
| 902 |
|
tv.tv_usec = usec; |
| 903 |
|
#elif defined(USE_NANOSLEEP) |
| 904 |
|
elapsed.tv_sec = 0; |
| 905 |
|
elapsed.tv_nsec = usec * 1000; |
| 906 |
+ |
#elif defined(USE_COND_TIMEDWAIT) |
| 907 |
+ |
future = GetTicks_usec() + usec; |
| 908 |
+ |
elapsed.tv_sec = future / 1000000; |
| 909 |
+ |
elapsed.tv_nsec = (future % 1000000) * 1000; |
| 910 |
|
#else |
| 911 |
|
then = GetTicks_usec(); |
| 912 |
|
#endif |
| 913 |
|
|
| 914 |
|
do { |
| 915 |
|
errno = 0; |
| 916 |
< |
#ifdef USE_NANOSLEEP |
| 916 |
> |
#if defined(USE_NANOSLEEP) |
| 917 |
|
tv.tv_sec = elapsed.tv_sec; |
| 918 |
|
tv.tv_nsec = elapsed.tv_nsec; |
| 919 |
|
was_error = nanosleep(&tv, &elapsed); |
| 920 |
+ |
#elif defined(USE_COND_TIMEDWAIT) |
| 921 |
+ |
was_error = pthread_mutex_lock(&delay_mutex); |
| 922 |
+ |
was_error = pthread_cond_timedwait(&delay_cond, &delay_mutex, &elapsed); |
| 923 |
+ |
was_error = pthread_mutex_unlock(&delay_mutex); |
| 924 |
|
#else |
| 925 |
|
#ifndef SELECT_SETS_REMAINING |
| 926 |
|
// Calculate the time interval left (in case of interrupt) |
