2 Copyright (C) 2010 Tim Mayberry
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 #include "pbd/glib_semaphore.h"
24 GlibSemaphore::GlibSemaphore (gint initial_val)
26 m_counter(initial_val)
30 GlibSemaphore::wait ()
32 Glib::Threads::Mutex::Lock guard (m_mutex);
34 while (m_counter.get() < 1) {
38 // this shouldn't need to be inside the lock
43 GlibSemaphore::try_wait ()
45 if (!m_mutex.trylock())
50 while (m_counter.get() < 1) {
54 // the order of these should not matter
61 GlibSemaphore::post ()
63 // atomic, no locking required