1 files changed, 77 insertions, 0 deletions
diff --git a/cpukit/posix/src/timergettime.c b/cpukit/posix/src/timergettime.c
new file mode 100644
index 0000000000..bb39121b81
--- /dev/null
+++ b/cpukit/posix/src/timergettime.c
@@ -0,0 +1,77 @@
+/*
+ *  14.2.4 Per-Process Timers, P1003.1b-1993, p. 267
+ *
+ *  COPYRIGHT (c) 1989-2008.
+ *  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/seterr.h>
+#include <rtems/score/thread.h>
+#include <rtems/score/tod.h>
+#include <rtems/score/timespec.h>
+#include <rtems/posix/timer.h>
+
+/*
+ *          - When a timer is initialized, the value of the time in
+ *            that moment is stored.
+ *          - When this function is called, it returns the difference
+ *            between the current time and the initialization time.
+ */
+
+int timer_gettime(
+  timer_t            timerid,
+  struct itimerspec *value
+)
+{
+  POSIX_Timer_Control *ptimer;
+  Objects_Locations    location;
+  struct timespec      current_time;
+  Watchdog_Interval    left;
+
+  if ( !value )
+    rtems_set_errno_and_return_minus_one( EINVAL );
+
+  /* Reads the current time */
+  _TOD_Get( &current_time );
+
+  ptimer = _POSIX_Timer_Get( timerid, &location );
+  switch ( location ) {
+
+    case OBJECTS_LOCAL:
+
+      /* Calculates the time left before the timer finishes */
+
+      left =
+        (ptimer->Timer.start_time + ptimer->Timer.initial) - /* expire */
+        _Watchdog_Ticks_since_boot;                          /* now */
+
+      _Timespec_From_ticks( left, &value->it_value );
+
+      value->it_interval  = ptimer->timer_data.it_interval;
+
+      _Thread_Enable_dispatch();
+      return 0;
+
+#if defined(RTEMS_MULTIPROCESSING)
+    case OBJECTS_REMOTE:
+#endif
+    case OBJECTS_ERROR:
+      break;
+  }
+
+  rtems_set_errno_and_return_minus_one( EINVAL );
+}