text: /*
   * Copyright (c) 2016 Intel Corporation
   *
   * Copyright (c) 2004, Swedish Institute of Computer Science.
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the Institute nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   *
   * This file is part of the Contiki operating system.
   *
   * Author: Adam Dunkels <adam@sics.se>
   *
   */
  
  /**
   * \defgroup clock Clock library
   *
   * The clock library is the interface between Contiki and the platform
   * specific clock functionality. The clock library defines a macro,
   * CLOCK_SECOND, to convert seconds into the tick resolution of the platform.
   * Typically this is 1-10 milliseconds, e.g. 4*CLOCK_SECOND could be 512.
   * A 16 bit counter would thus overflow every 1-10 minutes.
   * Platforms use the tick interrupt to maintain a long term count
   * of seconds since startup.
   *
   */
  
  #ifndef OC_CLOCK_H
  #define OC_CLOCK_H
  
  #include "oc_clock_util.h"
  #include <stdint.h>
  
  #ifdef __cplusplus
  extern "C"
  {
  #endif
  
  /**
   * A second, measured in system clock time.
   *
   * \hideinitializer
   */
  #ifndef OC_CLOCK_CONF_TICKS_PER_SECOND
  #error "Please define OC_CLOCK_CONF_TICKS_PER_SECOND in oc_config.h"
  #else
  #define OC_CLOCK_SECOND OC_CLOCK_CONF_TICKS_PER_SECOND
  #endif
  
  /**
   * Initialize the clock library.
   *
   * This function initializes the clock library and should be called
   * from the main() function of the system.
   *
   */
  void oc_clock_init(void);
  
  /**
   * Get the current clock time.
   *
   * This function returns the current system clock time.
   *
   * \return The current clock time, measured in system ticks.
   */
  oc_clock_time_t oc_clock_time(void);
  
  /**
   * Get the current value of the platform seconds.
   *
   * This could be the number of seconds since startup, or
   * since a standard epoch.
   *
   * \return The value.
   */
  unsigned long oc_clock_seconds(void);
  
  /**
   * Wait for a given number of ticks.
   * \param t   How many ticks.
   *
   */
  void oc_clock_wait(oc_clock_time_t t);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* OC_CLOCK_H */
  