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/*
Copyright (C) 2000-2007 Paul Davis
This program 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 2 of the License, or
(at your option) any later version.
This program 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 this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __pbd__crossthread_h__
#define __pbd__crossthread_h__
#ifdef check
#undef check
#endif
#include <glibmm/main.h>
class CrossThreadChannel {
public:
CrossThreadChannel(bool);
~CrossThreadChannel();
void wakeup();
int selectable() const { return fds[0]; }
int deliver (char msg);
int receive (char& msg);
void drain ();
static void drain (int fd);
/* glibmm 2.22 and earlier has a terrifying bug that will
cause crashes whenever a Source is removed from
a MainContext (including the destruction of the MainContext),
because the Source is destroyed "out from under the nose of"
the RefPtr. I (Paul) have fixed this (https://bugzilla.gnome.org/show_bug.cgi?id=561885)
but in the meantime, we need a hack to get around the issue.
*/
Glib::RefPtr<Glib::IOSource> ios();
void drop_ios ();
bool ok() const { return fds[0] >= 0 && fds[1] >= 0; }
private:
Glib::RefPtr<Glib::IOSource>* _ios; // lazily constructed
int fds[2];
};
#endif /* __pbd__crossthread_h__ */
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