petermcs
151 lines
4.9 KiB
C
151 lines
4.9 KiB
C
/**************************************************************************
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*
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* Copyright (C) 2009 Steve Karg <skarg@users.sourceforge.net>
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* Multimedia Timer contribution by Cameron Crothers, 2008
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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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#define WIN32_LEAN_AND_MEAN
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#define STRICT 1
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#include <windows.h>
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#include "net.h"
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#include <MMSystem.h>
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#include "timer.h"
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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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/*************************************************************************
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* Description: simulate the gettimeofday Linux function
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* Returns: none
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* Notes: none
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*************************************************************************/
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int gettimeofday(
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struct timeval *tp,
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void *tzp)
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{
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struct _timeb timebuffer;
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tzp = tzp;
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_ftime(&timebuffer);
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tp->tv_sec = timebuffer.time;
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tp->tv_usec = timebuffer.millitm * 1000;
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return 0;
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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 = timer_milliseconds(index);
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if (index < MAX_MILLISECOND_TIMERS) {
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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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TIMECAPS tc;
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uint32_t period;
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/* set timer resolution */
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if (timeGetDevCaps(&tc, sizeof(TIMECAPS)) != TIMERR_NOERROR) {
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fprintf(stderr, "Failed to get timer resolution parameters\n");
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}
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/* configure for 1ms resolution - if possible */
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period = min(max(tc.wPeriodMin, 1), tc.wPeriodMax);
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timeBeginPeriod(period);
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}
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