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C:/temp/src/j2k/Deprecated/old_18mar_diff/nto/TimerSignal.hpp

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// Required library:  -lrt

#ifndef __J2K__TimerSignal_HPP__
#define __J2K__TimerSignal_HPP__

#include <j2k/Fred/Standard.hpp>
#include <j2k/Fred/Error/JErrorController.hpp>

#include <unistd.h>
#include <errno.h>
#include <pthread.h>
#include <signal.h>
#include <sys/time.h>

#if !defined( linux )
#include <sys/siginfo.h>
#endif


#if defined( __QNXNTO__ )

#include <sys/neutrino.h>

#endif

// 16-17
#ifndef  TimerSignalEvent
#define  TimerSignalEvent  SIGUSR1  
#endif

class TimerSignal;

// Only one timer can exist at a given time

class TimerSignal {
protected:
  static TimerSignal* theTimer;

public:

static const ULONG TimerSignal::Period_1_ms   =   1000000L;
static const ULONG TimerSignal::Period_10_ms  =  10000000L;
static const ULONG TimerSignal::Period_20_ms  =  20000000L;
static const ULONG TimerSignal::Period_50_ms  =  50000000L;
static const ULONG TimerSignal::Period_100_ms = 100000000L;
static const ULONG TimerSignal::Period_250_ms = 250000000L;
static const ULONG TimerSignal::Period_500_ms = 500000000L;
static const ULONG TimerSignal::Period_750_ms = 750000000L;

public:

  // Setup a timer, to be started later.
  TimerSignal( ULONG nsec = Period_500_ms, ULONG sec = 0 );

  inline virtual void start();
  inline virtual void stop();

  void set( ULONG nsec = Period_500_ms, ULONG sec = 0 );


// Should not be available to users...
protected:

  // Use the global variable for to call the real handler
  static void wrapper( int signo )
  {
    assert( signo == TimerSignalEvent );
    theTimer->tick( signo ); 
  }

  // Should be implement by children class
  virtual void tick( int signo ) = 0;


private:
  timer_t             timer_id;
  struct sigevent    event;
  struct itimerspec  t;
};

#include <j2k/nto/TimerSignal.inl>


#ifndef __TIMER__ALIAS
#define __TIMER__ALIAS

typedef TimerSignal  Timer;

#endif

#endif

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