winsup/cygwin/hires.h

   1 /* hires.h: Definitions for hires clock calculations
   2
   3    Copyright 2002 Red Hat, Inc.
   4
   5 This file is part of Cygwin.
   6
   7 This software is a copyrighted work licensed under the terms of the
   8 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
   9 details. */
  10
  11 #ifndef __HIRES_H__
  12 #define __HIRES_H__
  13
  14 #include <mmsystem.h>
  15
  16 class hires_base
  17 {
  18  protected:
  19   int inited;
  20   virtual void prime () {}
  21  public:
  22   virtual LONGLONG usecs (bool justdelta) {return 0LL;}
  23   virtual ~hires_base () {}
  24 };
  25
  26 class hires_us : hires_base
  27 {
  28   LARGE_INTEGER primed_ft;
  29   LARGE_INTEGER primed_pc;
  30   double freq;
  31   void prime ();
  32  public:
  33   LONGLONG usecs (bool justdelta);
  34 };
  35
  36 class hires_ms : hires_base
  37 {
  38   DWORD initime_ms;
  39   LARGE_INTEGER initime_us;
  40   UINT minperiod;
  41   void prime ();
  42  public:
  43   LONGLONG usecs (bool justdelta);
  44   ~hires_ms ();
  45 };
  46 #endif /*__HIRES_H__*/