mirror of
https://github.com/stargieg/bacnet-stack
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141 lines
4.5 KiB
C
141 lines
4.5 KiB
C
/**************************************************************************
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*
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* Copyright (C) 2009 Steve Karg <skarg@users.sourceforge.net>
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
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* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*********************************************************************/
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#include <stdio.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <time.h>
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#include "timer.h"
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/** @file linux/timer.c Provides Linux-specific time and timer functions. */
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/* counter for the various timers */
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static volatile uint32_t Millisecond_Counter[MAX_MILLISECOND_TIMERS];
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/* start time for the clock */
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static struct timespec start;
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/* The timeGetTime function retrieves the system time, in milliseconds.
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The system time is the time elapsed since Windows was started. */
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uint32_t timeGetTime(
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void)
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{
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struct timespec now;
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uint32_t ticks;
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clock_gettime(CLOCK_MONOTONIC, &now);
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ticks =
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(now.tv_sec - start.tv_sec) * 1000 + (now.tv_nsec -
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start.tv_nsec) / 1000000;
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return ticks;
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}
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/*************************************************************************
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* Description: returns the current millisecond count
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* Returns: none
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* Notes: none
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*************************************************************************/
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uint32_t timer_milliseconds(
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unsigned index)
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{
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uint32_t now = timeGetTime();
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uint32_t delta_time = 0;
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if (index < MAX_MILLISECOND_TIMERS) {
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if (Millisecond_Counter[index] <= now) {
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delta_time = now - Millisecond_Counter[index];
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} else {
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delta_time = (UINT32_MAX - Millisecond_Counter[index]) + now + 1;
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}
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}
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return delta_time;
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}
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/*************************************************************************
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* Description: compares the current time count with a value
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* Returns: true if the time has elapsed
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* Notes: none
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*************************************************************************/
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bool timer_elapsed_milliseconds(
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unsigned index,
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uint32_t value)
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{
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return (timer_milliseconds(index) >= value);
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}
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/*************************************************************************
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* Description: compares the current time count with a value
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* Returns: true if the time has elapsed
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* Notes: none
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*************************************************************************/
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bool timer_elapsed_seconds(
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unsigned index,
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uint32_t seconds)
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{
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return ((timer_milliseconds(index) / 1000) >= seconds);
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}
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/*************************************************************************
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* Description: compares the current time count with a value
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* Returns: true if the time has elapsed
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* Notes: none
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*************************************************************************/
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bool timer_elapsed_minutes(
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unsigned index,
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uint32_t minutes)
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{
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return ((timer_milliseconds(index) / (1000 * 60)) >= minutes);
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}
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/*************************************************************************
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* Description: Sets the timer counter to zero.
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* Returns: none
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* Notes: none
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*************************************************************************/
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uint32_t timer_reset(
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unsigned index)
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{
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uint32_t timer_value = 0;
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if (index < MAX_MILLISECOND_TIMERS) {
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timer_value = timer_milliseconds(index);
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Millisecond_Counter[index] = timeGetTime();
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}
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return timer_value;
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}
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/*************************************************************************
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* Description: Initialization for timer
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* Returns: none
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* Notes: none
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*************************************************************************/
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void timer_init(
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void)
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{
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clock_gettime(CLOCK_MONOTONIC, &start);
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}
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