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AmigActive 6
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BasiliskII
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AmigaOS
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timer_amiga.cpp
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C/C++ Source or Header
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1999-11-01
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3KB
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137 lines
/*
* timer_amiga.cpp - Time Manager emulation, AmigaOS specific stuff
*
* Basilisk II (C) 1997-1999 Christian Bauer
*
* This program 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 2 of the License, or
* (at your option) any later version.
*
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <exec/types.h>
#include <devices/timer.h>
#include <proto/timer.h>
#include <proto/intuition.h>
#include "sysdeps.h"
#include "timer.h"
#define DEBUG 0
#include "debug.h"
/*
* Return microseconds since boot (64 bit)
*/
void Microseconds(uint32 &hi, uint32 &lo)
{
D(bug("Microseconds\n"));
struct timeval tv;
GetSysTime(&tv);
uint64 tl = (uint64)tv.tv_secs * 1000000 + tv.tv_micro;
hi = tl >> 32;
lo = tl;
}
/*
* Return local date/time in Mac format (seconds since 1.1.1904)
*/
uint32 TimerDateTime(void)
{
ULONG secs;
ULONG mics;
CurrentTime(&secs, &mics);
return secs + TIME_OFFSET;
}
/*
* Get current time
*/
void timer_current_time(tm_time_t &t)
{
GetSysTime(&t);
}
/*
* Add times
*/
void timer_add_time(tm_time_t &res, tm_time_t a, tm_time_t b)
{
res = a;
AddTime(&res, &b);
}
/*
* Subtract times
*/
void timer_sub_time(tm_time_t &res, tm_time_t a, tm_time_t b)
{
res = a;
SubTime(&res, &b);
}
/*
* Compare times (<0: a < b, =0: a = b, >0: a > b)
*/
int timer_cmp_time(tm_time_t a, tm_time_t b)
{
return CmpTime(&b, &a);
}
/*
* Convert Mac time value (>0: microseconds, <0: microseconds) to tm_time_t
*/
void timer_mac2host_time(tm_time_t &res, int32 mactime)
{
if (mactime > 0) {
res.tv_secs = mactime / 1000; // Time in milliseconds
res.tv_micro = (mactime % 1000) * 1000;
} else {
res.tv_secs = -mactime / 1000000; // Time in negative microseconds
res.tv_micro = -mactime % 1000000;
}
}
/*
* Convert positive tm_time_t to Mac time value (>0: microseconds, <0: microseconds)
* A negative input value for hosttime results in a zero return value
* As long as the microseconds value fits in 32 bit, it must not be converted to milliseconds!
*/
int32 timer_host2mac_time(tm_time_t hosttime)
{
if (hosttime.tv_secs < 0)
return 0;
else {
uint64 t = (uint64)hosttime.tv_secs * 1000000 + hosttime.tv_micro;
if (t > 0x7fffffff)
return t / 1000; // Time in milliseconds
else
return -t; // Time in negative microseconds
}
}