Move the hi-res time to system tools

1 files changed, 55 insertions, 0 deletions

diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 1a81a1874b..3a6c362946 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -70,6 +70,61 @@ inline int Chdir(const char* dir)
 }
 #endif
 
+
+/* Implement floattime() for various platforms */
+// Taken from Python 2.1.3
+
+#if defined( _WIN32 ) && !defined( __CYGWIN__ )
+#  include <sys/timeb.h>
+#  define HAVE_FTIME
+#  if defined( __BORLANDC__)
+#    define FTIME ftime
+#    define TIMEB timeb
+#  else // Visual studio?
+#    define FTIME _ftime
+#    define TIMEB _timeb
+#  endif
+#elif defined( __CYGWIN__ ) || defined( __linux__ )
+#  include <sys/time.h>
+#  define HAVE_GETTIMEOFDAY
+#endif
+
+double
+cmSystemTools::GetTime(void)
+{
+  /* There are three ways to get the time:
+     (1) gettimeofday() -- resolution in microseconds
+     (2) ftime() -- resolution in milliseconds
+     (3) time() -- resolution in seconds
+     In all cases the return value is a float in seconds.
+     Since on some systems (e.g. SCO ODT 3.0) gettimeofday() may
+     fail, so we fall back on ftime() or time().
+     Note: clock resolution does not imply clock accuracy! */
+#ifdef HAVE_GETTIMEOFDAY
+  {
+  struct timeval t;
+#ifdef GETTIMEOFDAY_NO_TZ
+  if (gettimeofday(&t) == 0)
+    return (double)t.tv_sec + t.tv_usec*0.000001;
+#else /* !GETTIMEOFDAY_NO_TZ */
+  if (gettimeofday(&t, (struct timezone *)NULL) == 0)
+    return (double)t.tv_sec + t.tv_usec*0.000001;
+#endif /* !GETTIMEOFDAY_NO_TZ */
+  }
+#endif /* !HAVE_GETTIMEOFDAY */
+  {
+#if defined(HAVE_FTIME)
+  struct TIMEB t;
+  FTIME(&t);
+  return (double)t.time + (double)t.millitm * (double)0.001;
+#else /* !HAVE_FTIME */
+  time_t secs;
+  time(&secs);
+  return (double)secs;
+#endif /* !HAVE_FTIME */
+  }
+}
+
 bool cmSystemTools::s_DisableRunCommandOutput = false;
 bool cmSystemTools::s_ErrorOccured = false;
 bool cmSystemTools::s_DisableMessages = false;