winsup/cygwin/local_includes/posix_timer.h

   1 /* timer.h: Define class timer_tracker, base class for posix timers
   2
   3 This file is part of Cygwin.
   4
   5 This software is a copyrighted work licensed under the terms of the
   6 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
   7 details. */
   8
   9 #ifndef __POSIX_TIMER_H__
  10 #define __POSIX_TIMER_H__
  11
  12 #define TT_MAGIC 0x513e4a1c
  13 class timer_tracker
  14 {
  15   unsigned magic;
  16   SRWLOCK srwlock;
  17   clockid_t clock_id;
  18   sigevent evp;
  19   struct itimerspec time_spec;
  20   HANDLE timer;
  21   HANDLE cancel_evt;
  22   HANDLE sync_thr;
  23   LONG64 interval;
  24   LONG64 exp_ts;
  25   LONG overrun_count_curr;
  26   LONG64 overrun_count;
  27
  28   bool cancel ();
  29
  30  public:
  31   void *operator new (size_t, void *p) __attribute__ ((nothrow)) {return p;}
  32   void operator delete (void *p) { HeapFree (GetProcessHeap (), 0, p); }
  33   timer_tracker (clockid_t, const sigevent *);
  34   ~timer_tracker ();
  35   inline bool is_timer_tracker () const { return magic == TT_MAGIC; }
  36   inline sigevent_t *sigevt () { return &evp; }
  37   inline int getoverrun () const { return overrun_count_curr; }
  38
  39   LONG64 get_clock_now () const { return get_clock (clock_id)->n100secs (); }
  40   LONG64 get_exp_ts () const { return exp_ts; }
  41   LONG64 get_interval () const { return interval; }
  42   void set_exp_ts (LONG64 ts) { exp_ts = ts; }
  43
  44   bool arm_overrun_event (LONG64);
  45   LONG disarm_overrun_event ();
  46
  47   int gettime (itimerspec *, bool);
  48   int settime (int, const itimerspec *, itimerspec *);
  49
  50   DWORD thread_func ();
  51   static void fixup_after_fork ();
  52 };
  53
  54 #endif /* __POSIX_TIMER_H__ */