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cebix |
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/* |
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* timer_beos.cpp - Time Manager emulation, BeOS specific stuff |
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* |
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* Basilisk II (C) 1997-1999 Christian Bauer |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation; either version 2 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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*/ |
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#include <KernelKit.h> |
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#include "sysdeps.h" |
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#include "timer.h" |
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#define DEBUG 0 |
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#include "debug.h" |
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/* |
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* Return microseconds since boot (64 bit) |
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*/ |
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void Microseconds(uint32 &hi, uint32 &lo) |
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{ |
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D(bug("Microseconds\n")); |
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bigtime_t time = system_time(); |
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hi = time >> 32; |
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lo = time; |
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} |
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/* |
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* Return local date/time in Mac format (seconds since 1.1.1904) |
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*/ |
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cebix |
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const uint32 TIME_OFFSET = 0x7c25b080; // Offset Mac->BeOS time in seconds |
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cebix |
1.1 |
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uint32 TimerDateTime(void) |
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{ |
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cebix |
1.3 |
time_t utc_now = time(NULL); |
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cebix |
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long tz = timezone; |
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cebix |
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time_t local_now = utc_now - tz; |
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cebix |
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if (daylight) |
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local_now += 3600; |
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cebix |
1.1 |
return (uint32)local_now + TIME_OFFSET; |
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} |
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/* |
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* Get current time |
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*/ |
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void timer_current_time(tm_time_t &t) |
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{ |
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t = system_time(); |
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} |
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/* |
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* Add times |
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*/ |
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void timer_add_time(tm_time_t &res, tm_time_t a, tm_time_t b) |
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{ |
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res = a + b; |
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} |
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/* |
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* Subtract times |
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*/ |
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void timer_sub_time(tm_time_t &res, tm_time_t a, tm_time_t b) |
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{ |
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res = a - b; |
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} |
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/* |
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* Compare times (<0: a < b, =0: a = b, >0: a > b) |
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*/ |
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int timer_cmp_time(tm_time_t a, tm_time_t b) |
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{ |
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tm_time_t r = a - b; |
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return r < 0 ? -1 : (r > 0 ? 1 : 0); |
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} |
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/* |
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* Convert Mac time value (>0: microseconds, <0: microseconds) to tm_time_t |
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*/ |
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void timer_mac2host_time(tm_time_t &res, int32 mactime) |
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{ |
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if (mactime > 0) |
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res = mactime * 1000; // Time in milliseconds |
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else |
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res = -mactime; // Time in negative microseconds |
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} |
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/* |
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* Convert positive tm_time_t to Mac time value (>0: microseconds, <0: microseconds) |
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* A negative input value for hosttime results in a zero return value |
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* As long as the microseconds value fits in 32 bit, it must not be converted to milliseconds! |
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*/ |
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int32 timer_host2mac_time(tm_time_t hosttime) |
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{ |
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if (hosttime < 0) |
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return 0; |
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else if (hosttime > 0x7fffffff) |
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return hosttime / 1000; // Time in milliseconds |
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else |
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return -hosttime; // Time in negative microseconds |
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} |
