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/*
* Copyright 2002, The libsigc++ Development Team
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include <sigc++/connection.h>
namespace sigc {
connection::connection() noexcept
: slot_(nullptr)
{}
connection::connection(const connection& c)
: slot_(c.slot_)
{
//Let the connection forget about the signal handler when the handler object dies:
if (slot_)
slot_->add_destroy_notify_callback(this, ¬ify);
}
connection::connection(slot_base& sl)
: slot_(&sl)
{
//Let the connection forget about the signal handler when the handler object dies:
slot_->add_destroy_notify_callback(this, ¬ify);
}
connection& connection::operator=(const connection& c)
{
set_slot(c.slot_);
return *this;
}
connection::~connection()
{
if (slot_)
slot_->remove_destroy_notify_callback(this);
}
bool connection::empty() const noexcept
{
return (!slot_ || slot_->empty());
}
bool connection::connected() const noexcept
{
return !empty();
}
bool connection::blocked() const noexcept
{
return (slot_ ? slot_->blocked() : false);
}
bool connection::block(bool should_block) noexcept
{
return (slot_ ? slot_->block(should_block) : false);
}
bool connection::unblock() noexcept
{
return (slot_ ? slot_->unblock() : false);
}
void connection::disconnect()
{
if (slot_)
slot_->disconnect(); // This notifies slot_'s parent.
}
connection::operator bool() noexcept
{
return !empty();
}
void connection::set_slot(slot_base* sl)
{
if (slot_)
slot_->remove_destroy_notify_callback(this);
slot_ = sl;
if (slot_)
slot_->add_destroy_notify_callback(this, ¬ify);
}
void* connection::notify(void* data)
{
auto self = reinterpret_cast<connection*>(data);
self->slot_ = nullptr;
return nullptr;
}
} /* namespace sigc */
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