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authorDavid Robillard <d@drobilla.net>2007-07-24 19:26:47 +0000
committerDavid Robillard <d@drobilla.net>2007-07-24 19:26:47 +0000
commit3b4a308ff647def75e647ac8f97e1e48b57672c3 (patch)
treea33e3a5c78f2ee7f23e151f39fe17ab39b0b81c8 /raul/Semaphore.h
parentfcb302e6248527b2f1fb655f4d0a64af18f5f059 (diff)
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Consistently rename all C++ files .cpp/.hpp.
Fix (some) inclusion guard names to not clash with other libs. git-svn-id: http://svn.drobilla.net/lad/raul@613 a436a847-0d15-0410-975c-d299462d15a1
Diffstat (limited to 'raul/Semaphore.h')
-rw-r--r--raul/Semaphore.h75
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diff --git a/raul/Semaphore.h b/raul/Semaphore.h
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--- a/raul/Semaphore.h
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-/* This file is part of Raul.
- * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
- *
- * Raul 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.
- *
- * Raul 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 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.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#ifndef RAUL_SEMAPHORE_H
-#define RAUL_SEMAPHORE_H
-
-#include <semaphore.h>
-#include <boost/utility.hpp>
-
-namespace Raul {
-
-
-/** Trivial wrapper around POSIX semaphores (zero memory overhead).
- *
- * This was created to provide an alternative debuggable implementation of
- * semaphores based on a cond/mutex pair because semaphore's appeared not to
- * work in GDB. Turns out sem_wait can fail when run in GDB, and Debian
- * really needs to update it's man pages.
- *
- * This class remains as a trivial (yet pretty) wrapper/abstraction.
- *
- * \ingroup raul
- */
-class Semaphore : boost::noncopyable {
-public:
- inline Semaphore(unsigned int initial) { sem_init(&_sem, 0, initial); }
-
- inline ~Semaphore() { sem_destroy(&_sem); }
-
- inline void reset(unsigned int initial)
- { sem_destroy(&_sem); sem_init(&_sem, 0, initial); }
-
- /** Increment (and signal any waiters).
- *
- * Realtime safe.
- */
- inline void post() { sem_post(&_sem); }
-
- /** Wait until count is > 0, then decrement.
- *
- * Note that sem_wait always returns 0 in practise. It returns nonzero
- * when run in GDB, so the while is necessary to allow debugging.
- *
- * Obviously not realtime safe.
- */
- inline void wait() { while (sem_wait(&_sem) != 0) ; }
-
- /** Non-blocking version of wait().
- *
- * Realtime safe?
- */
- inline int try_wait() { return sem_trywait(&_sem); }
-
-private:
- sem_t _sem;
-};
-
-
-} // namespace Raul
-
-#endif // RAUL_SEMAPHORE_H