semaphore

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// vi:set ft=cpp: -*- Mode: C++ -*-
/*
 * (c) 2015 Alexander Warg <alexander.warg@kernkonzept.com>
 *
 * This file is part of TUD:OS and distributed under the terms of the
 * GNU General Public License 2.
 * Please see the COPYING-GPL-2 file for details.
 *
 * As a special exception, you may use this file as part of a free software
 * library without restriction.  Specifically, if other files instantiate
 * templates or use macros or inline functions from this file, or you compile
 * this file and link it with other files to produce an executable, this
 * file does not by itself cause the resulting executable to be covered by
 * the GNU General Public License.  This exception does not however
 * invalidate any other reasons why the executable file might be covered by
 * the GNU General Public License.
 */
 
#pragma once
 
#include <l4/sys/irq>
#include <l4/sys/semaphore.h>
 
namespace L4 {
 
struct Semaphore : Kobject_t<Semaphore, Triggerable, L4_PROTO_SEMAPHORE>
{
  l4_msgtag_t up(l4_utcb_t *utcb = l4_utcb()) noexcept
  { return trigger(utcb); }
 
  l4_msgtag_t down(l4_timeout_t timeout = L4_IPC_NEVER,
                   l4_utcb_t *utcb = l4_utcb()) noexcept
  { return l4_semaphore_down_u(cap(), timeout, utcb);  }
};
 
}