Committing in .

[wxWidgets.git] / src / common / timercmn.cpp

diff --git a/src/common/timercmn.cpp b/src/common/timercmn.cpp
index 5c9fe9bd396f14d2ffdebb8bda0347eb04f094f0..f1173ff1633eed983d2c1366f960a689e4516bd7 100644 (file)
--- a/src/common/timercmn.cpp
+++ b/src/common/timercmn.cpp
@@ -19,7 +19,7 @@
 // ============================================================================
 
 // ----------------------------------------------------------------------------
-// headers
+// wxWin headers
 // ----------------------------------------------------------------------------
 
 #ifdef __GNUG__
@@ -41,10 +41,25 @@
 #include "wx/timer.h"
 #include "wx/longlong.h"
 
+// ----------------------------------------------------------------------------
+// System headers
+// ----------------------------------------------------------------------------
+
 #if defined(__WIN32__)
     #include <windows.h>
 #endif
 
+#if defined(__WIN32__) && !defined(HAVE_FTIME)
+    #define HAVE_FTIME
+#endif
+
+#if defined(__VISAGECPP__) && !defined(HAVE_FTIME)
+    #define HAVE_FTIME
+#  if __IBMCPP__ >= 400
+    #  define ftime(x) _ftime(x)
+#  endif
+#endif
+
 #include <time.h>
 #ifndef __WXMAC__
     #include <sys/types.h>      // for time_t
@@ -80,22 +95,16 @@
     #endif
 #endif // HAVE_GETTIMEOFDAY
 
-// ----------------------------------------------------------------------------
-// prototypes
-// ----------------------------------------------------------------------------
-
-wxLongLong wxGetLocalTimeMillis();
-
 // ============================================================================
 // implementation
 // ============================================================================
 
-#if wxUSE_GUI
-
 // ----------------------------------------------------------------------------
 // wxTimerBase
 // ----------------------------------------------------------------------------
 
+#if wxUSE_GUI
+
 void wxTimerBase::Notify()
 {
     // the base class version generates an event if it has owner - which it
@@ -224,11 +233,16 @@ long wxGetUTCTime()
 
             if (t0 != (time_t)-1 )
                 return (long)difftime(t1, t0) + (60 * 60 * 24 * 4);
-            wxLogSysError(_("Failed 2nd mktime"));
+            wxLogSysError(_("mktime() failed"));
+        }
+        else
+        {
+            wxLogSysError(_("gmtime() failed"));
         }
-        wxLogSysError(_("Failed gmtime"));
     }
-    wxLogSysError(_("Failed to get the UTC system time"));
+
+    wxLogError(_("Failed to get the UTC system time."));
+
     return -1;
 }
 
@@ -238,6 +252,9 @@ wxLongLong wxGetLocalTimeMillis()
 {
     wxLongLong val = 1000l;
 
+    // If possible, use a functin which avoids conversions from
+    // broken-up time structures to milliseconds,
+
 #if defined(HAVE_GETTIMEOFDAY)
     struct timeval tp;
     if ( wxGetTimeOfDay(&tp, (struct timezone *)NULL) != -1 )
@@ -245,35 +262,55 @@ wxLongLong wxGetLocalTimeMillis()
         val *= tp.tv_sec;
         return (val + (tp.tv_usec / 1000));
     }
-#else
+    else
+    {
+        wxLogError(_("wxGetTimeOfDay failed."));
+        return 0;
+    }
+#elif defined(HAVE_FTIME)
+    struct timeb tp;
 
+    // ftime() is void and not int in some mingw32 headers, so don't
+    // test the return code (well, it shouldn't fail anyhow...)
+    (void)ftime(&tp);
+    val *= tp.time;
+    return (val + tp.millitm);
+#else // no gettimeofday() nor ftime()
     // We use wxGetLocalTime() to get the seconds since
     // 00:00:00 Jan 1st 1970 and then whatever is available
     // to get millisecond resolution.
-    // THIS LEADS TO A BUG SINCE REFERENCE TIME ARE DIFFERENT
+    //
+    // NOTE that this might lead to a problem if the clocks
+    // use different sources, so this approach should be
+    // avoided where possible.
+
     val *= wxGetLocalTime();
 
-    // If we got here, do not fail even if we can't get
-    // millisecond resolution.
-    //
-#if defined(__WIN32__)
+// GRG: This will go soon as all WIN32 seem to have ftime
+#if defined (__WIN32__)
+    // If your platform/compiler needs to use two different functions
+    // to get ms resolution, please do NOT just shut off these warnings,
+    // drop me a line instead at <guille@iies.es>
+    #warning "Possible clock skew bug in wxGetLocalTimeMillis()!"
+
     SYSTEMTIME st;
     ::GetLocalTime(&st);
-    return (val + st.wMilliseconds);
-#elif defined(__VISAGECPP__)
-    DATETIME    dt;
-    ::DosGetDateTime(&dt);
-    return (val + dt.hundredths*10);
-#elif defined(HAVE_FTIME)
-    struct timeb tp;
-    if ( ftime(&tp) == 0 )
-    {
-        return (val + tp.millitm);
-    }
-#elif !defined(__BORLANDC__) && !(defined(__VISUALC__) && defined(__WIN16__))
-    #warning "wxStopWatch will be up to second resolution!"
-#endif
+    val += st.wMilliseconds;
+#else // !Win32
+    // If your platform/compiler does not support ms resolution please
+    // do NOT just shut off these warnings, drop me a line instead at
+    // <guille@iies.es>
+
+    #if defined(__VISUALC__)
+        #pragma message("wxStopWatch will be up to second resolution!")
+    #elif defined(__BORLANDC__)
+        #pragma message "wxStopWatch will be up to second resolution!"
+    #else
+        #warning "wxStopWatch will be up to second resolution!"
+    #endif // compiler
 #endif
 
     return val;
+
+#endif // time functions
 }