IOhandler.h

/* -*- mode: c++ -*- */
#ifndef __DAQpp_IOhandler_h__
#define __DAQpp_IOhandler_h__
#include <csignal>
#include <pthread.h>

namespace DAQpp
{
class IOhandler
{
private:
    int signum;
    double nTrg;
    bool   newData;
#ifdef USE_MUTEX
    pthread_mutex_t mtx;
#else
    int    sem;
#endif
    struct sigaction actIO;

    void (*func)(void *);
    void *ptr;
    static IOhandler *instance;

    int lock ();
    bool trylock();
    int unlock();
public:
    IOhandler(int s);
    ~IOhandler();

    void   Register( void (*f)(void *), void *p );
    void   Unregister();
    void   ResetTrg()
    {
        nTrg = 0.;
        newData = false;
    }
    void   PrepareForData();
    double GetNtrg()
    {
        return nTrg;
    }
    bool   Data()
    {
        return newData;
    }
    void   WaitForData();
    static void gotIO(int);
};
}
#endif

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