ntdll: Add support for the monotonic time counter on Mac OS X.

dlls/ntdll/time.c

@@ -38,6 +38,9 @@
 #ifdef HAVE_UNISTD_H
 # include <unistd.h>
 #endif
+#ifdef __APPLE__
+# include <mach/mach_time.h>
+#endif
 
 #define NONAMELESSUNION
 #define NONAMELESSSTRUCT
@@ -111,6 +114,11 @@ static ULONGLONG monotonic_counter(void)
 #endif
     if (!clock_gettime( CLOCK_MONOTONIC, &ts ))
         return ts.tv_sec * (ULONGLONG)TICKSPERSEC + ts.tv_nsec / 100;
+#elif defined(__APPLE__)
+    static mach_timebase_info_data_t timebase;
+
+    if (!timebase.denom) mach_timebase_info( &timebase );
+    return mach_absolute_time() * timebase.numer / timebase.denom / 100;
 #endif
 
     gettimeofday( &now, 0 );