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#include "ossignalconverter_p.h"
#include <signal.h>
#include <QTimer>
#include <stdio.h>

Q_GLOBAL_STATIC(OsSignalConverter, osSignalConverter);

OsSignalConverter* OsSignalConverter::instance()
{
    return osSignalConverter();
}

OsSignalConverter::OsSignalConverter()
: d(new OsSignalConverterPrivate(this))
{
};

OsSignalConverter::~OsSignalConverter()
{
}

OsSignalConverterPrivate::OsSignalConverterPrivate(OsSignalConverter* owner)
: QObject(owner), q(owner), poller(new QTimer(this))
{
    trap();
    connect(poller, SIGNAL(timeout()), this, SLOT(poll()));
    poller->start(1000);
}

OsSignalConverterPrivate::~OsSignalConverterPrivate()
{
    untrap();
}

void OsSignalConverterPrivate::trap()
{
    signal(SIGINT, handler);
    signal(SIGTERM, handler);
#ifdef SIGBREAK
    signal(SIGBREAK, handler);
#endif
#ifdef SIGHUP
    signal(SIGHUP, handler);
#endif
#ifdef SIGQUIT
    signal(SIGQUIT, handler);
#endif
}

void OsSignalConverterPrivate::untrap()
{
    signal(SIGINT, SIG_DFL);
    signal(SIGTERM, SIG_DFL);
#ifdef SIGBREAK
    signal(SIGBREAK, SIG_DFL);
#endif
#ifdef SIGHUP
    signal(SIGHUP, SIG_DFL);
#endif
#ifdef SIGQUIT
    signal(SIGQUIT, SIG_DFL);
#endif
}

void OsSignalConverterPrivate::handler(int sig)
{
    untrap(); //allow 2nd ctrl-c to really kill us
    terminateRequest = sig;
}

void OsSignalConverterPrivate::poll()
{
    if (terminateRequest) {
        fprintf(stderr, "\n*** caught signal %d, terminating ***\n", terminateRequest);
        poller->stop();
        emit q->terminate();
    }
}

sig_atomic_t OsSignalConverterPrivate::terminateRequest;