diff options
Diffstat (limited to 'udelay.c')
-rw-r--r-- | udelay.c | 34 |
1 files changed, 33 insertions, 1 deletions
@@ -1,4 +1,4 @@ -/* $Id: udelay.c,v 1.3 2001/03/01 22:33:50 reinelt Exp $ +/* $Id: udelay.c,v 1.4 2001/03/12 12:39:36 reinelt Exp $ * * short delays * @@ -20,6 +20,10 @@ * * * $Log: udelay.c,v $ + * Revision 1.4 2001/03/12 12:39:36 reinelt + * + * reworked autoconf a lot: drivers may be excluded, #define's went to config.h + * * Revision 1.3 2001/03/01 22:33:50 reinelt * * renamed Raster_flush() to PPM_flush() @@ -57,10 +61,18 @@ #include <stdlib.h> #include <stdio.h> + +#ifdef USE_OLD_UDELAY #include <time.h> +#else +#include <sys/time.h> +#include <unistd.h> +#endif #include "udelay.h" +#ifdef USE_OLD_UDELAY + unsigned long loops_per_usec; void udelay (unsigned long usec) @@ -104,3 +116,23 @@ void udelay_calibrate (void) loops_per_usec&=~bit; } } + +#else + +void udelay (unsigned long usec) +{ + struct timeval now, end; + + gettimeofday (&end, NULL); + end.tv_usec+=usec; + while (end.tv_usec>1000000) { + end.tv_usec-=1000000; + end.tv_sec++; + } + + do { + gettimeofday(&now, NULL); + } while (now.tv_sec==end.tv_sec?now.tv_usec<end.tv_usec:now.tv_sec<end.tv_sec); +} + +#endif |