Zigbee Protocol Controller 1.6.0
pt-sem.h
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1/*
2 * Copyright (c) 2004, Swedish Institute of Computer Science.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the Institute nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * This file is part of the Contiki operating system.
30 *
31 * Author: Adam Dunkels <adam@sics.se>
32 *
33 * $Id: pt-sem.h,v 1.2 2008/10/14 12:46:39 nvt-se Exp $
34 */
35
160#ifndef __PT_SEM_H__
161#define __PT_SEM_H__
162
163#include "sys/pt.h"
164
165struct pt_sem {
166 unsigned int count;
167};
168
183#define PT_SEM_INIT(s, c) (s)->count = c
184
201#define PT_SEM_WAIT(pt, s) \
202 do { \
203 PT_WAIT_UNTIL(pt, (s)->count > 0); \
204 --(s)->count; \
205 } while(0)
206
222#define PT_SEM_SIGNAL(pt, s) ++(s)->count
223
224#endif /* __PT_SEM_H__ */
225
Definition: pt-sem.h:165
unsigned int count
Definition: pt-sem.h:166