Contiki-NG
rtimer-arch.h
1 /*
2  * Copyright (c) 2007, 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  */
32 
33 #ifndef RTIMER_ARCH_H_
34 #define RTIMER_ARCH_H_
35 
36 #include "contiki.h"
37 #include "sys/clock.h"
38 #include "lib/simEnvChange.h"
39 #include "sys/cooja_mt.h"
40 
41 #define RTIMER_ARCH_SECOND UINT64_C(1000000)
42 
43 #define US_TO_RTIMERTICKS(US) (US)
44 #define RTIMERTICKS_TO_US(T) (T)
45 #define RTIMERTICKS_TO_US_64(T) (T)
46 
47 rtimer_clock_t rtimer_arch_now(void);
48 int rtimer_arch_check(void);
49 int rtimer_arch_pending(void);
50 rtimer_clock_t rtimer_arch_next(void);
51 
52 /** \brief A platform-specific implementation that calls cooja_mt_yield()
53  * periodically. Without this, Cooja will get stuck in the busy-loop
54  * without ever updating the current rtimer time. */
55 #define RTIMER_BUSYWAIT_UNTIL_ABS(cond, t0, max_time) \
56  ({ \
57  bool c; \
58  while(!(c = cond) && RTIMER_CLOCK_LT(RTIMER_NOW(), (t0) + (max_time))) { \
59  simProcessRunValue = 1; \
60  cooja_mt_yield(); \
61  } \
62  c; \
63  })
64 
65 #endif /* RTIMER_ARCH_H_ */
rtimer_clock_t rtimer_arch_now(void)
Returns the current real-time clock time.
Definition: rtimer-arch.c:115