Rename file to match EPICS C++ convention.

src/libCom/osi/os/RTEMS/osdTime.cpp

@@ -0,0 +1,89 @@
+/*
+ * $Id$
+ *
+ * Author: W. Eric Norum
+ */
+//
+
+/*
+ * ANSI C
+ */
+#include <time.h>
+#include <limits.h>
+
+/*
+ * RTEMS
+ */
+#include <rtems.h>
+#include <rtems/rtems_bsdnet.h>
+
+/*
+ * EPICS
+ */
+#define epicsExportSharedSymbols
+#include "osiTime.h"
+#include "errlog.h"
+
+extern "C" {
+/*
+ * RTEMS clock rate
+ */
+rtems_interval rtemsTicksPerSecond;
+double rtemsTicksPerSecond_double;
+
+/*
+ * RTEMS time begins January 1, 1988 (local time).
+ * EPICS time begins January 1, 1990 (GMT).
+ *
+ * FIXME: How to handle daylight-savings time?
+ */
+#define EPICS_EPOCH_SEC_PAST_RTEMS_EPOCH ((366+365)*86400)
+static unsigned long timeoffset;
+
+/*
+ * Get current time
+ * Allow for this to be called before clockInit() and before
+ * system time and date have been initialized.
+ */
+int tsStampGetCurrent (TS_STAMP *pDest)
+{
+    struct timeval curtime;
+    rtems_interval t;
+    rtems_status_code sc;
+
+    for (;;) {
+	sc = rtems_clock_get (RTEMS_CLOCK_GET_TIME_VALUE, &curtime);
+	if (sc == RTEMS_SUCCESSFUL)
+	    break;
+	else if (sc != RTEMS_NOT_DEFINED)
+	    return tsStampERROR;
+	sc = rtems_clock_get (RTEMS_CLOCK_GET_TICKS_PER_SECOND, &t);
+	if (sc != RTEMS_SUCCESSFUL)
+	    return tsStampERROR;
+	rtems_task_wake_after (t);
+    }
+    pDest->nsec = curtime.tv_usec * 1000;
+    pDest->secPastEpoch = curtime.tv_sec - timeoffset;
+   return tsStampOK;
+}
+	
+/*
+ * tsStampGetEvent ()
+ */
+int tsStampGetEvent (TS_STAMP *pDest, unsigned eventNumber)
+{
+    if (eventNumber==tsStampEventCurrentTime) {
+        return tsStampGetCurrent (pDest);
+    }
+    else {
+        return tsStampERROR;
+    }
+}
+
+void clockInit(void)
+{
+	timeoffset = EPICS_EPOCH_SEC_PAST_RTEMS_EPOCH - rtems_bsdnet_timeoffset;
+	rtems_clock_get (RTEMS_CLOCK_GET_TICKS_PER_SECOND, &rtemsTicksPerSecond);
+	rtemsTicksPerSecond_double = rtemsTicksPerSecond;
+}
+}