From ba16717a62bd93431b6523a6b24beddcb232dca7 Mon Sep 17 00:00:00 2001
From: Joel Sherrill <joel.sherrill@OARcorp.com>
Date: Wed, 15 Nov 2006 15:34:45 +0000
Subject: 2006-11-15	Joel Sherrill <joel.sherrill@oarcorp.com>

	* posix/Makefile.am: Add file missed in previous commit.
	* posix/src/posixtimespecabsolutetimeout.c: New file.
---
 cpukit/ChangeLog                                |  5 ++
 cpukit/posix/Makefile.am                        |  7 +--
 cpukit/posix/src/posixtimespecabsolutetimeout.c | 69 +++++++++++++++++++++++++
 3 files changed, 78 insertions(+), 3 deletions(-)
 create mode 100644 cpukit/posix/src/posixtimespecabsolutetimeout.c

(limited to 'cpukit')

diff --git a/cpukit/ChangeLog b/cpukit/ChangeLog
index 1b59a79250..afc4011568 100644
--- a/cpukit/ChangeLog
+++ b/cpukit/ChangeLog
@@ -1,3 +1,8 @@
+2006-11-15	Joel Sherrill <joel.sherrill@oarcorp.com>
+
+	* posix/Makefile.am: Add file missed in previous commit.
+	* posix/src/posixtimespecabsolutetimeout.c: New file.
+
 2006-11-15	Ralf Corsépius <ralf.corsepius@rtems.org>
 
 	* configure.ac: Remove RTEMS_AMPOLISH3.
diff --git a/cpukit/posix/Makefile.am b/cpukit/posix/Makefile.am
index 49f86640c7..52522befd8 100644
--- a/cpukit/posix/Makefile.am
+++ b/cpukit/posix/Makefile.am
@@ -146,9 +146,10 @@ libposix_a_SOURCES += src/pspin.c src/pspindestroy.c src/pspininit.c \
 ## TIME_C_FILES
 libposix_a_SOURCES += src/adjtime.c src/time.c src/posixtimespecsubtract.c \
     src/posixtimespectointerval.c src/posixintervaltotimespec.c \
-    src/clockgetcpuclockid.c src/clockgetenableattr.c src/clockgetres.c \
-    src/clockgettime.c src/clocksetenableattr.c src/clocksettime.c \
-    src/nanosleep.c src/sleep.c src/usleep.c
+    src/posixtimespecabsolutetimeout.c src/clockgetcpuclockid.c \
+    src/clockgetenableattr.c src/clockgetres.c src/clockgettime.c \
+    src/clocksetenableattr.c src/clocksettime.c src/nanosleep.c src/sleep.c \
+    src/usleep.c
 
 # the timer manager needs to be split further but only after its
 # dependence on the Classic API Timer Manager is removed.
diff --git a/cpukit/posix/src/posixtimespecabsolutetimeout.c b/cpukit/posix/src/posixtimespecabsolutetimeout.c
new file mode 100644
index 0000000000..df70c90533
--- /dev/null
+++ b/cpukit/posix/src/posixtimespecabsolutetimeout.c
@@ -0,0 +1,69 @@
+/*
+ *  Convert abstime timeout to ticks
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <stdarg.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <semaphore.h>
+#include <limits.h>
+
+#include <rtems/system.h>
+#include <rtems/score/object.h>
+#include <rtems/posix/semaphore.h>
+#include <rtems/posix/time.h>
+#include <rtems/seterr.h>
+
+/*
+ *  The abstime is a walltime.  We turn it into an interval.
+ */
+int _POSIX_Absolute_timeout_to_ticks(
+  const struct timespec *abstime,
+  Watchdog_Interval     *ticks_out
+)
+{
+  struct timespec   current_time;
+  struct timespec   difference;
+
+  if ( !abstime )
+    return EINVAL;
+
+  /*
+   *  Error check the absolute time to timeout
+   */
+#if 0
+   /* they are unsigned so this is impossible */
+  if ( abstime->tv_sec < 0 || abstime->tv_nsec < 0 )
+    return EINVAL;
+#endif
+
+  if ( abstime->tv_nsec >= TOD_NANOSECONDS_PER_SECOND )
+    return EINVAL;
+  
+  (void) clock_gettime( CLOCK_REALTIME, &current_time );
+
+  /*
+   *  Make sure the abstime is in the future
+   */
+  if ( abstime->tv_sec < current_time.tv_sec )
+    return EINVAL;
+
+  if ( (abstime->tv_sec == current_time.tv_sec) &&
+       (abstime->tv_nsec <= current_time.tv_nsec) )
+    return EINVAL;
+
+  _POSIX_Timespec_subtract( &current_time, abstime, &difference );
+
+  *ticks_out = _POSIX_Timespec_to_interval( &difference );
+
+  return 0;
+}
+
-- 
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