Steve Karg
77 lines
2.4 KiB
C
77 lines
2.4 KiB
C
/**************************************************************************
|
|
*
|
|
* Copyright (C) 2009 Steve Karg <skarg@users.sourceforge.net>
|
|
* Multimedia Timer contribution by Cameron Crothers, 2008
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person obtaining
|
|
* a copy of this software and associated documentation files (the
|
|
* "Software"), to deal in the Software without restriction, including
|
|
* without limitation the rights to use, copy, modify, merge, publish,
|
|
* distribute, sublicense, and/or sell copies of the Software, and to
|
|
* permit persons to whom the Software is furnished to do so, subject to
|
|
* the following conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be included
|
|
* in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
|
|
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
|
|
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
|
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
|
|
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
*********************************************************************/
|
|
#include <stdio.h>
|
|
#include <stdbool.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <limits.h>
|
|
#include <time.h>
|
|
#include "bacport.h"
|
|
#include "bacnet/basic/sys/mstimer.h"
|
|
|
|
/* Windows timer period - in milliseconds */
|
|
static unsigned long Timer_Period = 1;
|
|
|
|
/**
|
|
* @brief returns the current millisecond count
|
|
* @return millisecond counter
|
|
*/
|
|
unsigned long mstimer_now(void)
|
|
{
|
|
return timeGetTime();
|
|
}
|
|
|
|
/**
|
|
* @brief Shut down for timer
|
|
*/
|
|
static void timer_cleanup(void)
|
|
{
|
|
timeEndPeriod(Timer_Period);
|
|
}
|
|
|
|
/**
|
|
* @brief Initialization for timer
|
|
*/
|
|
void mstimer_init(void)
|
|
{
|
|
TIMECAPS tc;
|
|
|
|
/* set timer resolution */
|
|
if (timeGetDevCaps(&tc, sizeof(TIMECAPS)) != TIMERR_NOERROR) {
|
|
fprintf(stderr, "Failed to get timer resolution parameters\n");
|
|
}
|
|
/* configure for 1ms resolution - if possible */
|
|
Timer_Period = min(max(tc.wPeriodMin, 1L), tc.wPeriodMax);
|
|
if (Timer_Period != 1L) {
|
|
fprintf(stderr,
|
|
"Failed to set timer to 1ms. "
|
|
"Time period set to %ums\n",
|
|
(unsigned)Timer_Period);
|
|
}
|
|
timeBeginPeriod(Timer_Period);
|
|
atexit(timer_cleanup);
|
|
}
|