coap_time.h

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/*
 * coap_time.h -- Clock Handling
 *
 * Copyright (C) 2010-2019 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_

#if defined(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;

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

COAP_STATIC_INLINE void coap_clock_init_impl(void) {
}

#define coap_clock_init coap_clock_init_impl
#define coap_ticks coap_ticks_impl

COAP_STATIC_INLINE coap_time_t coap_ticks_to_rt(coap_tick_t t) {
  return t / COAP_TICKS_PER_SECOND;
}

COAP_STATIC_INLINE uint64_t coap_ticks_to_rt_us(coap_tick_t t) {
  return (uint64_t)t * 1000000 / COAP_TICKS_PER_SECOND;
}

#elif defined(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

COAP_STATIC_INLINE void coap_clock_init(void) {
  clock_init();
}

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

COAP_STATIC_INLINE coap_time_t coap_ticks_to_rt(coap_tick_t t) {
  return t / COAP_TICKS_PER_SECOND;
}

COAP_STATIC_INLINE uint64_t coap_ticks_to_rt_us(coap_tick_t t) {
  return (uint64_t)t * 1000000 / COAP_TICKS_PER_SECOND;
}

#else
#include <stdint.h>

typedef uint64_t coap_tick_t;

typedef time_t coap_time_t;

typedef int64_t coap_tick_diff_t;

#define COAP_TICKS_PER_SECOND ((coap_tick_t)(1000U))

void coap_clock_init(void);

void coap_ticks(coap_tick_t *t);

coap_time_t coap_ticks_to_rt(coap_tick_t t);

uint64_t coap_ticks_to_rt_us(coap_tick_t t);

coap_tick_t coap_ticks_from_rt_us(uint64_t t);
#endif

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

COAP_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_ */