src/os/bsd/vm/os_bsd.hpp

rev 6229 : 8040140: System.nanoTime() is slow and non-monotonic on OS X
Reviewed-by: sspitsyn, shade, dholmes, acorn

*** 56,66 ****
--- 56,72 ----
    static void check_signal_handler(int sig);
  
    // For signal flags diagnostics
    static int sigflags[MAXSIGNUM];
  
+ #ifdef __APPLE__
+   // mach_absolute_time
+   static mach_timebase_info_data_t _timebase_info;
+   static volatile uint64_t         _max_abstime;
+ #else
    static int (*_clock_gettime)(clockid_t, struct timespec *);
+ #endif
  
    static GrowableArray<int>* _cpu_to_node;
  
   protected:
  
*** 133,147 ****
  
    // Real-time clock functions
    static void clock_init(void);
  
    static inline bool supports_monotonic_clock() {
      return _clock_gettime != NULL;
!   }
! 
!   static int clock_gettime(clockid_t clock_id, struct timespec *tp) {
!     return _clock_gettime ? _clock_gettime(clock_id, tp) : -1;
    }
  
    // Stack repair handling
  
    // none present
--- 139,153 ----
  
    // Real-time clock functions
    static void clock_init(void);
  
    static inline bool supports_monotonic_clock() {
+ #ifdef __APPLE__
+     return true;
+ #else
      return _clock_gettime != NULL;
! #endif
    }
  
    // Stack repair handling
  
    // none present