diff --git a/src/libCom/osi/tsStamp.h b/src/libCom/osi/tsStamp.h
new file mode 100644
index 000000000..44395b1c6
--- /dev/null
+++ b/src/libCom/osi/tsStamp.h
@@ -0,0 +1,91 @@
+/*
+ * ANSI C manipulation of type TS_STAMP
+ *
+ * Author: Jeff Hill. 
+ *
+ * Original TS_STAMP definition by Roger Cole
+ *
+ * Notes:
+ * 1) all functions return -1 on failure and 0 on success
+ * 2) the implementation of these routines is provided by 
+ *      C++ type osiTime
+ */
+
+#ifndef tsStamph
+#define tsStamph
+
+#include <time.h>
+
+#include "shareLib.h"
+#include "epicsTypes.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+struct timespec;
+
+#define tsStampOK 0
+#define tsStampERROR (-1)
+
+#define tsStampEventCurrentTime 0
+
+/*
+ * The number of nanoseconds past 0000 Jan 1, 1990, GMT (or UTC).
+ */
+typedef struct TS_STAMP {
+    epicsUInt32    secPastEpoch;   /* seconds since 0000 Jan 1, 1990 */
+    epicsUInt32    nSec;           /* nanoseconds within second */
+} TS_STAMP;
+
+
+/*
+ * fetch a time stamp
+ */
+epicsShareFunc int epicsShareAPI tsStampGetCurrent (TS_STAMP *pDest);
+epicsShareFunc int epicsShareAPI tsStampGetEvent (TS_STAMP *pDest, unsigned eventNumber);
+
+/*
+ * convert to and from ANSI C's "time_t"
+ */
+epicsShareFunc int epicsShareAPI tsStampToTime_t (time_t *pDest, const TS_STAMP *pSrc);
+epicsShareFunc int epicsShareAPI tsStampFromTime_t (TS_STAMP *pDest, time_t src);
+
+/*
+ * convert to and from ANSI C's "struct tm" with nano seconds
+ */
+epicsShareFunc int epicsShareAPI tsStampToTM (struct tm *pDest, unsigned long *pNSecDest, const TS_STAMP *pSrc);
+epicsShareFunc int epicsShareAPI tsStampFromTM (TS_STAMP *pDest, const struct tm *pSrc, unsigned long nSecSrc);
+
+/*
+ * convert to and from POSIX RT's "struct timespec"
+ */
+epicsShareFunc int epicsShareAPI tsStampToTimespec (struct timespec *pDest, const TS_STAMP *pSrc);
+epicsShareFunc int epicsShareAPI tsStampFromTimespec (TS_STAMP *pDest, const struct timespec *pSrc);
+
+/*
+ * arithmetic operations
+ */
+epicsShareFunc long double epicsShareAPI tsStampDiffInSeconds (const TS_STAMP *pLeft, const TS_STAMP *pRight); /* returns *pLeft - *pRight in seconds */
+epicsShareFunc void epicsShareAPI tsStampAddSeconds (TS_STAMP *pDest, long double secondsToAdd); /* adds seconds to *pDest */
+
+/*
+ * comparison operations
+ */
+epicsShareFunc int epicsShareAPI tsStampEqual (const TS_STAMP *pLeft, const TS_STAMP *pRight); /* returns boolean result */
+epicsShareFunc int epicsShareAPI tsStampNotEqual (const TS_STAMP *pLeft, const TS_STAMP *pRight); /* returns boolean result */
+epicsShareFunc int epicsShareAPI tsStampLessThan (const TS_STAMP *pLeft, const TS_STAMP *pRight); /* returns boolean result (true if *pLeft < *pRight) */
+epicsShareFunc int epicsShareAPI tsStampLessThanEqual (const TS_STAMP *pLeft, const TS_STAMP *pRight); /* returns boolean result (true if *pLeft <= *pRight) */
+epicsShareFunc int vtsStampGreaterThan (const TS_STAMP *pLeft, const TS_STAMP *pRight); /* returns boolean result (true if *pLeft > *pRight) */
+epicsShareFunc int epicsShareAPI tsStampGreaterThanEqual (const TS_STAMP *pLeft, const TS_STAMP *pRight); /* returns boolean result (true if *pLeft >= *pRight) */
+
+/*
+ * dump current state to standard out
+ */
+epicsShareFunc void epicsShareAPI tsStampShow (const TS_STAMP *, unsigned interestLevel);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* tsStamph */