emulators/rtc with other apps other than Linux apps?

[Mike Johnson]

Hi,
	I got rtc working with mplayer and I am wondering if it would be worth  
using it instead of usleep? I'm not very familiar with how  
emulators/rtc works vs. linux rtc. Is the rtc port as fast and accurate  
as linux rtc?

mplayer seems to run really well with  4.9

$ mplayer blah.mpeg
MPlayer 0.92-2.95.4  (C) 2000-2003 MPlayer Team
<-- SNIP -->
Using Linux hardware RTC timing (1024Hz).

I was unable to get rtc to work on 5.2-CURRENT
not only with mplayer but with test.c also
it said /dev/rtc was busy

diff -ruN multimedia/mplayer.orig/Makefile multimedia/mplayer/Makefile
--- multimedia/mplayer.orig/Makefile	Thu Feb 26 04:18:00 2004
+++ multimedia/mplayer/Makefile	Thu Feb 26 05:59:23 2004
@@ -52,6 +52,7 @@
  # Further, the correct instruction set of your processor is normally
  # auto-detected, so there is probably no necissity to change them.
  #
+#
  # WITHOUT_MMX
  # default: autodetected
  # disables using of mmx code
@@ -74,6 +75,10 @@
  # kernel config. This is standard for 5.x systems on I686_CPU and  
above.
  # 4.x users will have to define this explicitly.
  #
+# WITH_RTC
+# default: autodetected
+# REAL TIME CLOCK support
+#
  #
  # Feature options:
  # These options influence, which libraries mplayer is linked to.
@@ -235,6 +240,10 @@

  .include <bsd.port.pre.mk>

+.if exists(${LOCALBASE}/modules/rtc.ko)
+WITH_RTC=	yes
+.endif
+
  .if exists(${LOCALBASE}/lib/libartsc.so.0)
  WITH_ARTS=	yes
  .endif
@@ -331,6 +340,14 @@
  PLIST_SUB+=	GMPLAYER="@comment "
  .endif

+.if defined(WITH_RTC)
+BUILD_DEPENDS+=	${LOCALBASE}/modules/rtc.ko:${PORTSDIR}/emulators/rtc
+RUN_DEPENDS+=	${LOCALBASE}/modules/rtc.ko:${PORTSDIR}/emulators/rtc
+EXTRA_PATCHES=	${PATCHDIR}/rtc-configure-patch
+CONFIGURE_ARGS+=	--enable-rtc
+CONFIGURE_ENV+=		CFLAGS+="-I/${LOCALBASE}/include"
+.endif
+
  .if defined(WITH_GUI)
  USE_GNOME+=	gtk12
   
RUN_DEPENDS+=	${LOCALBASE}/share/mplayer/Skin:${PORTSDIR}/multimedia/ 
mplayer-skins
@@ -552,6 +569,21 @@
  		${CONFIGURE_WRKSRC}/${CONFIGURE_SCRIPT}
  	@${REINPLACE_CMD} -Ee 's#-pthread|-lc_r#${PTHREAD_LIBS}#g' \
  		${WRKSRC}/configure
+.if defined(WITH_RTC)
+	@${REINPLACE_CMD} -e \
+		's|<linux/rtc.h>|<rtc.h>|' \
+		${WRKSRC}/configure \
+		${WRKSRC}/mplayer.c
+	@${REINPLACE_CMD} -e \
+		's|RTC_IRQP_SET|RTCIO_IRQP_SET|' \
+		${WRKSRC}/mplayer.c
+	@${REINPLACE_CMD} -e \
+		's|RTC_PIE_ON|RTCIO_PIE_ON|' \
+		${WRKSRC}/mplayer.c
+	@${REINPLACE_CMD} -e \
+		's|rtc_fd|rtc|' \
+		${WRKSRC}/mplayer.c
+.endif

  pre-configure:
  .if defined(WITH_LIBDVDREAD)
diff -ruN multimedia/mplayer.orig/files/rtc-configure-patch  
multimedia/mplayer/files/rtc-configure-patch
--- multimedia/mplayer.orig/files/rtc-configure-patch	Wed Dec 31  
19:00:00 1969
+++ multimedia/mplayer/files/rtc-configure-patch	Thu Feb 26 05:37:03  
2004
@@ -0,0 +1,11 @@
+--- configure.orig	Thu Feb 26 04:13:03 2004
++++ configure	Thu Feb 26 04:12:22 2004
+@@ -3781,7 +3781,7 @@
+
+
+ echocheck "RTC"
+-if linux ; then
++if freebsd  ; then
+   if test "$_rtc" = auto ; then
+     cat > $TMPC << EOF
+ #include <sys/ioctl.h>