1 files changed, 92 insertions, 0 deletions
diff --git a/compat/gettimeofday.c b/compat/gettimeofday.c
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+/*---------------------------------------------------------------
+ * Copyright (c) 1999,2000,2001,2002,2003
+ * The Board of Trustees of the University of Illinois
+ * All Rights Reserved.
+ *---------------------------------------------------------------
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software (Iperf) and associated
+ * documentation files (the "Software"), to deal in the Software
+ * without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit
+ * persons to whom the Software is furnished to do
+ * so, subject to the following conditions:
+ *
+ *
+ * Redistributions of source code must retain the above
+ * copyright notice, this list of conditions and
+ * the following disclaimers.
+ *
+ *
+ * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following
+ * disclaimers in the documentation and/or other materials
+ * provided with the distribution.
+ *
+ *
+ * Neither the names of the University of Illinois, NCSA,
+ * nor the names of its contributors may be used to endorse
+ * or promote products derived from this Software without
+ * specific prior written permission.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE CONTIBUTORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ * ________________________________________________________________
+ * National Laboratory for Applied Network Research
+ * National Center for Supercomputing Applications
+ * University of Illinois at Urbana-Champaign
+ * http://www.ncsa.uiuc.edu
+ * ________________________________________________________________
+ *
+ * gettimeofday.c
+ * by Mark Gates <mgates@nlanr.net>
+ * -------------------------------------------------------------------
+ * A (hack) implementation of gettimeofday for Windows.
+ * Since I send sec/usec in UDP packets, this made the most sense.
+ * ------------------------------------------------------------------- */
+
+#ifdef HAVE_CONFIG_H
+    #include "config.h"
+#endif
+
+#ifndef HAVE_GETTIMEOFDAY
+
+    #include "headers.h"
+    #include "gettimeofday.h"
+
+    #ifdef __cplusplus
+extern "C" {
+#endif
+
+int gettimeofday( struct timeval* tv, void* timezone ) {
+    FILETIME time;
+    double   timed;
+
+    GetSystemTimeAsFileTime( &time );
+
+    // Apparently Win32 has units of 1e-7 sec (tenths of microsecs)
+    // 4294967296 is 2^32, to shift high word over
+    // 11644473600 is the number of seconds between
+    // the Win32 epoch 1601-Jan-01 and the Unix epoch 1970-Jan-01
+    // Tests found floating point to be 10x faster than 64bit int math.
+
+    timed = ((time.dwHighDateTime * 4294967296e-7) - 11644473600.0) +
+            (time.dwLowDateTime  * 1e-7);
+
+    tv->tv_sec  = (long) timed;
+    tv->tv_usec = (long) ((timed - tv->tv_sec) * 1e6);
+
+    return 0;
+}
+
+#ifdef __cplusplus
+} /* end extern "C" */
+#endif
+
+#endif /* HAVE_GETTIMEOFDAY */