[svn-r20499] Fixes erroneous H5_HAVE_GETTIMEOFDAY behavior on Windows (JIRA HDFFV-5931). Previously, H5_HAVE_GETTIMEOFDAY was never properly defined. The timezone struct and Wgettimeofday() timezone output was also added.

This is a merge of several changesets from the log_vfd branch where this work took place: 20355, 20359, 20411, 20413, 20431, 20460

Tested on: Windows

1 files changed, 16 insertions, 5 deletions

diff --git a/src/H5system.c b/src/H5system.c
index 02ea625..afe07b0 100644
--- a/src/H5system.c
+++ b/src/H5system.c
@@ -604,25 +604,36 @@ HDremove_all(const char *fname)
  *
  *-------------------------------------------------------------------------
  */
-#if !defined(H5_HAVE_GETTIMEOFDAY) && defined(_WIN32)
+#ifdef _WIN32
 
-/* Offset between 1/1/1601 and 1/1/1970 in 100 nanosec units */
+/* Offset between 1/1/1601 and 1/1/1970 in 100 nanosecond units */
 #define _W32_FT_OFFSET (116444736000000000ULL)
 
 int
-Wgettimeofday(struct timeval *tv, void *tz)
+Wgettimeofday(struct timeval *tv, struct timezone *tz)
  {
   union {
     unsigned long long ns100; /*time since 1 Jan 1601 in 100ns units */
     FILETIME ft;
   }  _now;
 
-  if(tv)
-    {
+    static int tzsetflag;
+
+    if(tv) {
       GetSystemTimeAsFileTime (&_now.ft);
       tv->tv_usec=(long)((_now.ns100 / 10ULL) % 1000000ULL );
       tv->tv_sec= (long)((_now.ns100 - _W32_FT_OFFSET) / 10000000ULL);
     }
+
+    if(tz) {
+        if(!tzsetflag) {
+            _tzset();
+            tzsetflag = 1;
+        }
+        tz->tz_minuteswest = _timezone / 60;
+        tz->tz_dsttime = _daylight;
+    }
+
   /* Always return 0 as per Open Group Base Specifications Issue 6.
      Do not set errno on error.  */
   return 0;