source: psi/vendor/affinix/current/cutestuff/util/safedelete.cpp@ 2

#include"safedelete.h"

#include<qtimer.h>

//----------------------------------------------------------------------------
// SafeDelete
//----------------------------------------------------------------------------
SafeDelete::SafeDelete()
{
        lock = 0;
}

SafeDelete::~SafeDelete()
{
        if(lock)
                lock->dying();
}

void SafeDelete::deleteLater(QObject *o)
{
        if(!lock)
                deleteSingle(o);
        else
                list.append(o);
}

void SafeDelete::unlock()
{
        lock = 0;
        deleteAll();
}

void SafeDelete::deleteAll()
{
        if(list.isEmpty())
                return;

        QObjectListIt it(list);
        for(QObject *o; (o = it.current()); ++it)
                deleteSingle(o);
        list.clear();
}

void SafeDelete::deleteSingle(QObject *o)
{
#if QT_VERSION < 0x030000
        // roll our own QObject::deleteLater()
        SafeDeleteLater *sdl = SafeDeleteLater::ensureExists();
        sdl->deleteItLater(o);
#else
        o->deleteLater();
#endif
}

//----------------------------------------------------------------------------
// SafeDeleteLock
//----------------------------------------------------------------------------
SafeDeleteLock::SafeDeleteLock(SafeDelete *sd)
{
        own = false;
        if(!sd->lock) {
                _sd = sd;
                _sd->lock = this;
        }
        else
                _sd = 0;
}

SafeDeleteLock::~SafeDeleteLock()
{
        if(_sd) {
                _sd->unlock();
                if(own)
                        delete _sd;
        }
}

void SafeDeleteLock::dying()
{
        _sd = new SafeDelete(*_sd);
        own = true;
}

//----------------------------------------------------------------------------
// SafeDeleteLater
//----------------------------------------------------------------------------
SafeDeleteLater *SafeDeleteLater::self = 0;

SafeDeleteLater *SafeDeleteLater::ensureExists()
{
        if(!self)
                new SafeDeleteLater();
        return self;
}

SafeDeleteLater::SafeDeleteLater()
{
        list.setAutoDelete(true);
        self = this;
        QTimer::singleShot(0, this, SLOT(explode()));
}

SafeDeleteLater::~SafeDeleteLater()
{
        list.clear();
        self = 0;
}

void SafeDeleteLater::deleteItLater(QObject *o)
{
        list.append(o);
}

void SafeDeleteLater::explode()
{
        delete this;
}