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/*
Copyright (C) 2010 Tim Mayberry
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_GLIB_SEMAPHORE_H
#define PBD_GLIB_SEMAPHORE_H
#include <glibmm/threads.h>
#include "pbd/libpbd_visibility.h"
#include "atomic_counter.h"
namespace PBD {
class LIBPBD_API GlibSemaphore
{
// prevent copying and assignment
GlibSemaphore(const GlibSemaphore& sema);
GlibSemaphore& operator= (const GlibSemaphore& sema);
public:
GlibSemaphore (gint initial_val = 1);
void wait ();
bool try_wait ();
void post ();
private:
atomic_counter m_counter;
Glib::Threads::Cond m_cond;
Glib::Threads::Mutex m_mutex;
};
} // namespace PBD
#endif // PBD_SEMAPHORE_H
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