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#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;
}
#include "safedelete.moc"
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