coap_time.h

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/*
 * coap_time.h -- Clock Handling
 *
 * Copyright (C) 2010-2013 Olaf Bergmann <bergmann@tzi.org>
 *
 * This file is part of the CoAP library libcoap. Please see README for terms
 * of use.
 */

#ifndef _COAP_TIME_H_
#define _COAP_TIME_H_

#ifdef WITH_LWIP

#include <stdint.h>
#include <lwip/sys.h>

/* lwIP provides ms in sys_now */
#define COAP_TICKS_PER_SECOND 1000

typedef uint32_t coap_tick_t;
typedef uint32_t coap_time_t;
typedef int32_t coap_tick_diff_t;

static inline void coap_ticks_impl(coap_tick_t *t) {
  *t = sys_now();
}

static inline void coap_clock_init_impl(void) {
}

#define coap_clock_init coap_clock_init_impl
#define coap_ticks coap_ticks_impl

static inline coap_time_t coap_ticks_to_rt(coap_tick_t t) {
  return t / COAP_TICKS_PER_SECOND;
}
#endif

#ifdef WITH_CONTIKI
#include "clock.h"

typedef clock_time_t coap_tick_t;
typedef clock_time_t coap_time_t;

typedef int coap_tick_diff_t;

#define COAP_TICKS_PER_SECOND CLOCK_SECOND

static inline void coap_clock_init(void) {
  clock_init();
}

static inline void coap_ticks(coap_tick_t *t) {
  *t = clock_time();
}

static inline coap_time_t coap_ticks_to_rt(coap_tick_t t) {
  return t / COAP_TICKS_PER_SECOND;
}
#endif /* WITH_CONTIKI */

#ifdef WITH_POSIX

typedef unsigned long coap_tick_t;

typedef time_t coap_time_t;

typedef long coap_tick_diff_t;

#define COAP_TICKS_PER_SECOND 1000

void coap_clock_init(void);

void coap_ticks(coap_tick_t *t);

coap_time_t coap_ticks_to_rt(coap_tick_t t);
#endif /* WITH_POSIX */

static inline int coap_time_lt(coap_tick_t a, coap_tick_t b) {
  return ((coap_tick_diff_t)(a - b)) < 0;
}

static inline int coap_time_le(coap_tick_t a, coap_tick_t b) {
  return a == b || coap_time_lt(a,b);
}

#endif /* _COAP_TIME_H_ */