os-k/kaleid/kernel/ke/pit.c

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2019-11-11 23:57:31 +01:00
//----------------------------------------------------------------------------//
// GNU GPL OS/K //
// //
// Desc: RTC Time related functions //
// //
// //
// Copyright © 2018-2019 The OS/K Team //
// //
// This file is part of OS/K. //
// //
// OS/K is free software: you can redistribute it and/or modify //
// it under the terms of the GNU General Public License as published by //
// the Free Software Foundation, either version 3 of the License, or //
// any later version. //
// //
// OS/K is distributed in the hope that it will be useful, //
// but WITHOUT ANY WARRANTY//without even the implied warranty of //
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
// GNU General Public License for more details. //
// //
// You should have received a copy of the GNU General Public License //
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
//----------------------------------------------------------------------------//
#include <lib/buf.h>
#include <ke/time.h>
#include <ke/idt.h>
#define COUNTDONE 1
static TimerFilo_t timerFilo[20]; //20 concurrent sleep max
//
// ISR handler for the Programmable Interval Timer
//
static void HandleTimer(ISRFrame_t *regs)
{
for (uchar i = 0; i < 20; i++) {
if (timerFilo[i].countDown > 0) {
timerFilo[i].countDown--;
if (timerFilo[i].countDown == 0)
i; //XXX SendMessage a message to timerFifo[i].sema that COUNTDONE;
}
}
}
static TimerFilo_t* KeFindTimerBlock(void)
{
for(uchar i = 0; i < 20; i++) {
if (timerFilo[i].countDown == 0)
return &timerFilo[i];
}
return NULL;
}
void KeSleep(uint delay)
{
struct TimerFilo_t *timerBlock;
if ((timerBlock = (TimerFilo_t*)KeFindTimerBlock()) == NULL)
return;
timerBlock->countDown = delay;
// wait for a message on timerFifo[i].sema
}