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AmigActive 6
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BasiliskII
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Unix
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timer_unix.cpp
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C/C++ Source or Header
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1999-10-19
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4KB
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204 lines
/*
* timer_unix.cpp - Time Manager emulation, Unix 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 "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"));
#ifdef HAVE_CLOCK_GETTIME
struct timespec t;
clock_gettime(CLOCK_REALTIME, &t);
uint64 tl = (uint64)t.tv_sec * 1000000 + t.tv_nsec / 1000;
#else
struct timeval t;
gettimeofday(&t, NULL);
uint64 tl = (uint64)t.tv_sec * 1000000 + t.tv_usec;
#endif
hi = tl >> 32;
lo = tl;
}
/*
* Return local date/time in Mac format (seconds since 1.1.1904)
*/
uint32 TimerDateTime(void)
{
time_t utc_now = time(NULL);
#if defined(__linux__) || defined(__SVR4)
long tz = timezone;
time_t local_now = utc_now - tz;
if (daylight)
local_now += 3600;
#elif defined(__FreeBSD__) || defined(__NetBSD__)
time_t local_now = utc_now + localtime(&utc_now)->tm_gmtoff;
#else
time_t local_now = utc_now;
#endif
return (uint32)local_now + TIME_OFFSET;
}
/*
* Get current time
*/
void timer_current_time(tm_time_t &t)
{
#ifdef HAVE_CLOCK_GETTIME
clock_gettime(CLOCK_REALTIME, &t);
#else
gettimeofday(&t, NULL);
#endif
}
/*
* Add times
*/
void timer_add_time(tm_time_t &res, tm_time_t a, tm_time_t b)
{
#ifdef HAVE_CLOCK_GETTIME
res.tv_sec = a.tv_sec + b.tv_sec;
res.tv_nsec = a.tv_nsec + b.tv_nsec;
if (res.tv_nsec >= 1000000000) {
res.tv_sec++;
res.tv_nsec -= 1000000000;
}
#else
res.tv_sec = a.tv_sec + b.tv_sec;
res.tv_usec = a.tv_usec + b.tv_usec;
if (res.tv_usec >= 1000000) {
res.tv_sec++;
res.tv_usec -= 1000000;
}
#endif
}
/*
* Subtract times
*/
void timer_sub_time(tm_time_t &res, tm_time_t a, tm_time_t b)
{
#ifdef HAVE_CLOCK_GETTIME
res.tv_sec = a.tv_sec - b.tv_sec;
res.tv_nsec = a.tv_nsec - b.tv_nsec;
if (res.tv_nsec < 0) {
res.tv_sec--;
res.tv_nsec += 1000000000;
}
#else
res.tv_sec = a.tv_sec - b.tv_sec;
res.tv_usec = a.tv_usec - b.tv_usec;
if (res.tv_usec < 0) {
res.tv_sec--;
res.tv_usec += 1000000;
}
#endif
}
/*
* Compare times (<0: a < b, =0: a = b, >0: a > b)
*/
int timer_cmp_time(tm_time_t a, tm_time_t b)
{
#ifdef HAVE_CLOCK_GETTIME
if (a.tv_sec == b.tv_sec)
return a.tv_nsec - b.tv_nsec;
else
return a.tv_sec - b.tv_sec;
#else
if (a.tv_sec == b.tv_sec)
return a.tv_usec - b.tv_usec;
else
return a.tv_sec - b.tv_sec;
#endif
}
/*
* Convert Mac time value (>0: microseconds, <0: microseconds) to tm_time_t
*/
void timer_mac2host_time(tm_time_t &res, int32 mactime)
{
#ifdef HAVE_CLOCK_GETTIME
if (mactime > 0) {
// Time in milliseconds
res.tv_sec = mactime / 1000;
res.tv_nsec = (mactime % 1000) * 1000000;
} else {
// Time in negative microseconds
res.tv_sec = -mactime / 1000000;
res.tv_nsec = (-mactime % 1000000) * 1000;
}
#else
if (mactime > 0) {
// Time in milliseconds
res.tv_sec = mactime / 1000;
res.tv_usec = (mactime % 1000) * 1000;
} else {
// Time in negative microseconds
res.tv_sec = -mactime / 1000000;
res.tv_usec = -mactime % 1000000;
}
#endif
}
/*
* 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_sec < 0)
return 0;
else {
#ifdef HAVE_CLOCK_GETTIME
uint64 t = (uint64)hosttime.tv_sec * 1000000 + hosttime.tv_nsec / 1000;
#else
uint64 t = (uint64)hosttime.tv_sec * 1000000 + hosttime.tv_usec;
#endif
if (t > 0x7fffffff)
return t / 1000; // Time in milliseconds
else
return -t; // Time in negative microseconds
}
}