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/************************************************************************
*
* Copyright (C) 2009-2024 IRCAD France
* Copyright (C) 2012-2016 IHU Strasbourg
*
* This file is part of Sight.
*
* Sight 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 3 of the License, or
* (at your option) any later version.
*
* Sight 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 Sight. If not, see <https://www.gnu.org/licenses/>.
*
***********************************************************************/
#include "core/com/proxy.hpp"
#include <core/com/exception/bad_slot.hpp>
namespace sight::core::com
{
//-----------------------------------------------------------------------------
proxy::sptr s_current_proxy = std::make_shared<proxy>();
//-----------------------------------------------------------------------------
proxy::~proxy()
{
SIGHT_ASSERT("There are still " << m_channels.size() << " channel(s) in the Proxy", m_channels.empty());
}
//-----------------------------------------------------------------------------
proxy::sptr proxy::get()
{
return s_current_proxy;
}
//-----------------------------------------------------------------------------
void proxy::connect(channel_key_type _channel, core::com::signal_base::sptr _signal)
{
auto sigslots = find_or_create_channel(_channel);
core::mt::write_lock lock(sigslots->m_mutex);
auto ret = sigslots->m_signals.insert(_signal);
if(ret.second)
{
try
{
// Only connect if the signal was not already in the proxy
for(const auto& slot : sigslots->m_slots)
{
_signal->connect(slot);
}
}
catch(core::com::exception::bad_slot& e)
{
SIGHT_ERROR("Can't connect signal with slot in proxy '" << _channel << "' : " << e.what() << ".");
if(ret.second)
{
sigslots->m_signals.erase(_signal);
}
// No need to remove the channel, if there is an incompatibility, this implies the channel was created for
// a slot, thus it will be removed symmetrically
}
}
}
//-----------------------------------------------------------------------------
void proxy::connect(channel_key_type _channel, core::com::slot_base::sptr _slot)
{
auto sigslots = find_or_create_channel(_channel);
core::mt::write_lock lock(sigslots->m_mutex);
auto ret = sigslots->m_slots.insert(_slot);
if(ret.second)
{
try
{
// Only connect if the slot was not already in the proxy
for(const core::com::signal_base::sptr& signal : sigslots->m_signals)
{
signal->connect(_slot);
}
}
catch(core::com::exception::bad_slot& e)
{
SIGHT_ERROR("Can't connect signal with slot in proxy '" << _channel << "' : " << e.what() << ".");
if(ret.second)
{
sigslots->m_slots.erase(_slot);
}
// No need to remove the channel, if there is an incompatibility, this implies the channel was created for
// a signal, thus it will be removed symmetrically
}
}
}
//-----------------------------------------------------------------------------
void proxy::disconnect(channel_key_type _channel, core::com::signal_base::sptr _signal)
{
core::mt::read_to_write_lock lock(m_channel_mutex);
auto iter = m_channels.find(_channel);
SIGHT_ASSERT("channel '" << _channel << "' doesn't exist in Proxy.", iter != m_channels.end());
auto sigslots = iter->second;
core::mt::write_lock sig_slot_lock(sigslots->m_mutex);
for(const auto& slot : sigslots->m_slots)
{
_signal->disconnect(slot);
}
const auto sig_iter = std::find(sigslots->m_signals.begin(), sigslots->m_signals.end(), _signal);
SIGHT_ASSERT("Signal is not found", sig_iter != sigslots->m_signals.end());
sigslots->m_signals.erase(sig_iter);
if(sigslots->m_signals.empty() && sigslots->m_slots.empty())
{
core::mt::upgrade_to_write_lock write_lock(lock);
m_channels.erase(_channel);
}
}
//-----------------------------------------------------------------------------
void proxy::disconnect(channel_key_type _channel, core::com::slot_base::sptr _slot)
{
core::mt::read_to_write_lock lock(m_channel_mutex);
auto iter = m_channels.find(_channel);
SIGHT_ASSERT("channel '" << _channel << "' doesn't exist in Proxy.", iter != m_channels.end());
auto sigslots = iter->second;
core::mt::write_lock sig_slot_lock(sigslots->m_mutex);
for(const auto& signal : sigslots->m_signals)
{
signal->disconnect(_slot);
}
const auto slot_iter = std::find(sigslots->m_slots.begin(), sigslots->m_slots.end(), _slot);
SIGHT_ASSERT("Slot is not found", slot_iter != sigslots->m_slots.end());
sigslots->m_slots.erase(slot_iter);
if(sigslots->m_signals.empty() && sigslots->m_slots.empty())
{
core::mt::upgrade_to_write_lock write_lock(lock);
m_channels.erase(_channel);
}
}
//------------------------------------------------------------------------------
SPTR(proxy::sig_slots_t) proxy::find_or_create_channel(channel_key_type _channel)
{
SPTR(sig_slots_t) sigslots;
{
core::mt::read_to_write_lock lock(m_channel_mutex);
auto iter = m_channels.find(_channel);
if(iter == m_channels.end())
{
sigslots = std::make_shared<sig_slots_t>();
core::mt::upgrade_to_write_lock write_lock(lock);
m_channels[_channel] = sigslots;
}
else
{
sigslots = iter->second;
}
}
return sigslots;
}
//-----------------------------------------------------------------------------
} // namespace sight::core::com
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