my_getsystime()

1 files changed, 40 insertions, 0 deletions

diff --git a/mysys/my_getsystime.c b/mysys/my_getsystime.c
new file mode 100644
index 00000000000..33c2163120f
--- /dev/null
+++ b/mysys/my_getsystime.c
@@ -0,0 +1,40 @@
+/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+/* get time since epoc in 100 nanosec units */
+/* thus to get the current time we should use the system function
+   with the highest possible resolution */
+
+#include "mysys_priv.h"
+ulonglong my_getsystime()
+{
+#ifdef HAVE_CLOCK_GETTIME
+  struct timespec tp;
+  clock_gettime(CLOCK_REALTIME, &tp);
+  return (ulonglong)tp.tv_sec*10000000+(ulonglong)tp.tv_nsec/100;
+#elif defined(__WIN__)
+  /* TODO: use GetSystemTimeAsFileTime here or
+     QueryPerformanceCounter/QueryPerformanceFrequency */
+  struct _timeb tb;
+  _ftime(&tb);
+  return (ulonglong)tb.time*10000000+(ulonglong)tb.millitm*10000;
+#else
+  /* TODO: check for other possibilities for hi-res timestamping */
+  struct timeval tv;
+  gettimeofday(&tv,NULL);
+  return (ulonglong)tv.tv_sec*10000000+(ulonglong)tv.tv_usec*10;
+#endif
+}