JavaScriptCore-903.tar.gz

[apple/javascriptcore.git] / wtf / CurrentTime.cpp

diff --git a/wtf/CurrentTime.cpp b/wtf/CurrentTime.cpp
index b2728747bbb51559f10b74a128e44065459d23c0..42052276085e8209ec83e91e1160dca73cbb1d8f 100644 (file)
--- a/wtf/CurrentTime.cpp
+++ b/wtf/CurrentTime.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
+ * Copyright (C) 2006, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Google Inc. All rights reserved.
  * Copyright (C) 2007-2009 Torch Mobile, Inc.
  *
@@ -35,7 +35,7 @@
 
 #if OS(WINDOWS)
 
-// Windows is first since we want to use hires timers, despite PLATFORM(CF)
+// Windows is first since we want to use hires timers, despite USE(CF)
 // being defined.
 // If defined, WIN32_LEAN_AND_MEAN disables timeBeginPeriod/timeEndPeriod.
 #undef WIN32_LEAN_AND_MEAN
@@ -53,13 +53,13 @@ extern "C" time_t mktime(struct tm *t);
 #endif
 #endif
 
-#elif PLATFORM(CF)
-#include <CoreFoundation/CFDate.h>
 #elif PLATFORM(GTK)
 #include <glib.h>
 #elif PLATFORM(WX)
 #include <wx/datetime.h>
-#else // Posix systems relying on the gettimeofday()
+#elif PLATFORM(BREWMP)
+#include <AEEStdLib.h>
+#else
 #include <sys/time.h>
 #endif
 
@@ -163,7 +163,6 @@ double currentTime()
     // QueryPerformanceCounter has high resolution, but is only usable to measure time intervals.
     // To combine them, we call ftime and QueryPerformanceCounter initially. Later calls will use QueryPerformanceCounter
     // by itself, adding the delta to the saved ftime.  We periodically re-sync to correct for drift.
-    static bool started;
     static double syncLowResUTCTime;
     static double syncHighResUpTime;
     static double lastUTCTime;
@@ -249,13 +248,6 @@ double currentTime()
 
 #endif // USE(QUERY_PERFORMANCE_COUNTER)
 
-#elif PLATFORM(CF)
-
-double currentTime()
-{
-    return CFAbsoluteTimeGetCurrent() + kCFAbsoluteTimeIntervalSince1970;
-}
-
 #elif PLATFORM(GTK)
 
 // Note: GTK on Windows will pick up the PLATFORM(WIN) implementation above which provides
@@ -277,15 +269,27 @@ double currentTime()
     return (double)now.GetTicks() + (double)(now.GetMillisecond() / 1000.0);
 }
 
-#else // Other Posix systems rely on the gettimeofday().
+#elif PLATFORM(BREWMP)
 
+// GETUTCSECONDS returns the number of seconds since 1980/01/06 00:00:00 UTC,
+// and GETTIMEMS returns the number of milliseconds that have elapsed since the last
+// occurrence of 00:00:00 local time.
+// We can combine GETUTCSECONDS and GETTIMEMS to calculate the number of milliseconds
+// since 1970/01/01 00:00:00 UTC.
 double currentTime()
 {
-    struct timeval now;
-    struct timezone zone;
+    // diffSeconds is the number of seconds from 1970/01/01 to 1980/01/06
+    const unsigned diffSeconds = 315964800;
+    return static_cast<double>(diffSeconds + GETUTCSECONDS() + ((GETTIMEMS() % 1000) / msPerSecond));
+}
+
+#else
 
-    gettimeofday(&now, &zone);
-    return static_cast<double>(now.tv_sec) + (double)(now.tv_usec / 1000000.0);
+double currentTime()
+{
+    struct timeval now;
+    gettimeofday(&now, 0);
+    return now.tv_sec + now.tv_usec / 1000000.0;
 }
 
 #endif