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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
#include "API/Signals/slot_generic.h"
#include "API/Signals/slot.h"
/////////////////////////////////////////////////////////////////////////////
// CL_Slot_Generic construction:
CL_Slot_Generic::CL_Slot_Generic() : persistent(false), slot_ref_count(0), signal_ref_count(0)
{
}
CL_Slot_Generic::~CL_Slot_Generic()
{
}
/////////////////////////////////////////////////////////////////////////////
// CL_Slot_Generic attributes:
int CL_Slot_Generic::get_slot_ref() const
{
return slot_ref_count;
}
int CL_Slot_Generic::get_signal_ref() const
{
return signal_ref_count;
}
bool CL_Slot_Generic::is_persistent() const
{
return persistent;
}
/////////////////////////////////////////////////////////////////////////////
// CL_Slot_Generic operations:
void CL_Slot_Generic::add_slot_ref()
{
slot_ref_count++;
}
void CL_Slot_Generic::release_slot_ref()
{
slot_ref_count--;
check_delete();
}
void CL_Slot_Generic::add_signal_ref(CL_Signal *signal)
{
connected_signals.push_back(signal);
signal_ref_count++;
}
void CL_Slot_Generic::release_signal_ref(CL_Signal *signal)
{
connected_signals.remove(signal);
signal_ref_count--;
check_delete();
}
void CL_Slot_Generic::set_persistent(bool flag)
{
persistent = flag;
}
/////////////////////////////////////////////////////////////////////////////
//! Implementation:
void CL_Slot_Generic::check_delete()
{
// Try remove from signals immidiately, if possible:
if (slot_ref_count == 0 && signal_ref_count > 0)
{
// Prevent recursive looping (and allows us to create a helper CL_Slot object):
slot_ref_count++;
std::list<CL_Signal *> signals = connected_signals;
connected_signals.clear(); // clear member list to avoid recursive loop problems
std::list<CL_Signal *>::iterator it;
for (it = signals.begin(); it != signals.end(); ++it)
{
CL_Signal *cur = (*it);
CL_Slot slot(this);
cur->disconnect(slot);
}
slot_ref_count--;
}
// Delete ourselves if nobody reference us anymore
if (slot_ref_count == 0 && signal_ref_count == 0) delete this;
}
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