1 files changed, 65 insertions, 0 deletions
diff --git a/cpukit/posix/src/clockgetres.c b/cpukit/posix/src/clockgetres.c
new file mode 100644
index 0000000000..7507bee614
--- /dev/null
+++ b/cpukit/posix/src/clockgetres.c
@@ -0,0 +1,65 @@
+/*
+ *  $Id$
+ */
+
+/*
+ *  COPYRIGHT (c) 1989-2007.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <time.h>
+#include <errno.h>
+
+#include <rtems/system.h>
+#include <rtems/config.h>
+#include <rtems/score/isr.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/tod.h>
+
+#include <rtems/seterr.h>
+
+/*PAGE
+ *
+ *  14.2.1 Clocks, P1003.1b-1993, p. 263
+ */
+
+int clock_getres(
+  clockid_t        clock_id,
+  struct timespec *res
+)
+{
+  if ( !res )
+    rtems_set_errno_and_return_minus_one( EINVAL );
+
+  switch ( clock_id ) {
+
+    /*
+     *  All time in rtems is based on the same clock tick.
+     */
+
+    case CLOCK_REALTIME:
+    case CLOCK_PROCESS_CPUTIME:
+    case CLOCK_THREAD_CPUTIME:
+      if ( res ) {
+        res->tv_sec = rtems_configuration_get_microseconds_per_tick() /
+            TOD_MICROSECONDS_PER_SECOND;
+        res->tv_nsec = rtems_configuration_get_nanoseconds_per_tick();
+      }
+      break;
+
+    default:
+      rtems_set_errno_and_return_minus_one( EINVAL );
+
+  }
+  return 0;
+}