strawberry-audio-player-win.../src/core/signalchecker.cpp

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2018-02-27 18:06:05 +01:00
/*
* Strawberry Music Player
* This file was part of Clementine.
* Copyright 2010, David Sansome <me@davidsansome.com>
* Copyright 2012, 2014, John Maguire <john.maguire@gmail.com>
* Copyright 2014, Krzysztof Sobiecki <sobkas@gmail.com>
*
* Strawberry is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Strawberry 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Strawberry. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "config.h"
#include "signalchecker.h"
#include "core/logging.h"
gulong CheckedGConnect(gpointer source, const char *signal, GCallback callback, gpointer data, const int callback_param_count) {
guint signal_id = 0;
GQuark detail = 0;
if (!g_signal_parse_name(signal, G_OBJECT_TYPE(source), &signal_id, &detail, false)) {
qFatal("Connecting to invalid signal: %s", signal);
return 0;
}
GSignalQuery query;
g_signal_query(signal_id, &query);
// The signature for a signal callback is always:
// return_type callback(gpointer data1, params..., gpointer data2);
int signal_params = query.n_params + 2;
if (signal_params != callback_param_count) {
qFatal("Connecting callback to signal with different parameters counts");
return 0;
}
return g_signal_connect(source, signal, G_CALLBACK(callback), data);
}