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/* |
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* timer_unix.cpp - Time Manager emulation, Unix specific stuff |
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* |
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* Basilisk II (C) 1997-2001 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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|
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#include "sysdeps.h" |
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#include "macos_util.h" |
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#include "timer.h" |
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|
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#include <errno.h> |
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|
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#define DEBUG 0 |
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#include "debug.h" |
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|
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// For NetBSD with broken pthreads headers |
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#ifndef CLOCK_REALTIME |
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#define CLOCK_REALTIME 0 |
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#endif |
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|
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|
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/* |
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* Return microseconds since boot (64 bit) |
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*/ |
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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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#ifdef HAVE_CLOCK_GETTIME |
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struct timespec t; |
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clock_gettime(CLOCK_REALTIME, &t); |
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uint64 tl = (uint64)t.tv_sec * 1000000 + t.tv_nsec / 1000; |
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#else |
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struct timeval t; |
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gettimeofday(&t, NULL); |
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uint64 tl = (uint64)t.tv_sec * 1000000 + t.tv_usec; |
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#endif |
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hi = tl >> 32; |
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lo = tl; |
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} |
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|
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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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|
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uint32 TimerDateTime(void) |
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{ |
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return TimeToMacTime(time(NULL)); |
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} |
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|
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|
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/* |
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* Get current time |
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*/ |
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|
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void timer_current_time(tm_time_t &t) |
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{ |
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#ifdef HAVE_CLOCK_GETTIME |
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clock_gettime(CLOCK_REALTIME, &t); |
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#else |
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gettimeofday(&t, NULL); |
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#endif |
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} |
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|
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|
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/* |
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* Add times |
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*/ |
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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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#ifdef HAVE_CLOCK_GETTIME |
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res.tv_sec = a.tv_sec + b.tv_sec; |
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res.tv_nsec = a.tv_nsec + b.tv_nsec; |
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if (res.tv_nsec >= 1000000000) { |
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res.tv_sec++; |
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res.tv_nsec -= 1000000000; |
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} |
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#else |
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res.tv_sec = a.tv_sec + b.tv_sec; |
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res.tv_usec = a.tv_usec + b.tv_usec; |
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if (res.tv_usec >= 1000000) { |
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res.tv_sec++; |
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res.tv_usec -= 1000000; |
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} |
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#endif |
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} |
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|
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|
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/* |
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* Subtract times |
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*/ |
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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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#ifdef HAVE_CLOCK_GETTIME |
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res.tv_sec = a.tv_sec - b.tv_sec; |
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res.tv_nsec = a.tv_nsec - b.tv_nsec; |
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if (res.tv_nsec < 0) { |
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res.tv_sec--; |
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res.tv_nsec += 1000000000; |
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} |
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#else |
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res.tv_sec = a.tv_sec - b.tv_sec; |
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res.tv_usec = a.tv_usec - b.tv_usec; |
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if (res.tv_usec < 0) { |
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res.tv_sec--; |
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res.tv_usec += 1000000; |
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} |
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#endif |
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} |
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|
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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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|
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int timer_cmp_time(tm_time_t a, tm_time_t b) |
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{ |
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#ifdef HAVE_CLOCK_GETTIME |
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if (a.tv_sec == b.tv_sec) |
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return a.tv_nsec - b.tv_nsec; |
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else |
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return a.tv_sec - b.tv_sec; |
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#else |
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if (a.tv_sec == b.tv_sec) |
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return a.tv_usec - b.tv_usec; |
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else |
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return a.tv_sec - b.tv_sec; |
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#endif |
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} |
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|
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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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|
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void timer_mac2host_time(tm_time_t &res, int32 mactime) |
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{ |
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#ifdef HAVE_CLOCK_GETTIME |
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if (mactime > 0) { |
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// Time in milliseconds |
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res.tv_sec = mactime / 1000; |
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res.tv_nsec = (mactime % 1000) * 1000000; |
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} else { |
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// Time in negative microseconds |
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res.tv_sec = -mactime / 1000000; |
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res.tv_nsec = (-mactime % 1000000) * 1000; |
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} |
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#else |
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if (mactime > 0) { |
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// Time in milliseconds |
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res.tv_sec = mactime / 1000; |
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res.tv_usec = (mactime % 1000) * 1000; |
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} else { |
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// Time in negative microseconds |
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res.tv_sec = -mactime / 1000000; |
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res.tv_usec = -mactime % 1000000; |
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} |
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#endif |
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} |
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|
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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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|
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int32 timer_host2mac_time(tm_time_t hosttime) |
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{ |
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if (hosttime.tv_sec < 0) |
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return 0; |
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else { |
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#ifdef HAVE_CLOCK_GETTIME |
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uint64 t = (uint64)hosttime.tv_sec * 1000000 + hosttime.tv_nsec / 1000; |
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#else |
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uint64 t = (uint64)hosttime.tv_sec * 1000000 + hosttime.tv_usec; |
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#endif |
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if (t > 0x7fffffff) |
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return t / 1000; // Time in milliseconds |
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else |
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return -t; // Time in negative microseconds |
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} |
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} |
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|
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|
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/* |
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* Get current value of microsecond timer |
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*/ |
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|
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uint64 GetTicks_usec(void) |
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{ |
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#ifdef HAVE_CLOCK_GETTIME |
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struct timespec t; |
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clock_gettime(CLOCK_REALTIME, &t); |
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return (uint64)t.tv_sec * 1000000 + t.tv_nsec / 1000; |
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#else |
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struct timeval t; |
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gettimeofday(&t, NULL); |
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return (uint64)t.tv_sec * 1000000 + t.tv_usec; |
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#endif |
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} |
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|
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|
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/* |
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* Delay by specified number of microseconds (<1 second) |
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* (adapted from SDL_Delay() source; this function is designed to provide |
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* the highest accuracy possible) |
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*/ |
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|
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#if defined(linux) |
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// Linux select() changes its timeout parameter upon return to contain |
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// the remaining time. Most other unixen leave it unchanged or undefined. |
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#define SELECT_SETS_REMAINING |
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#elif defined(__FreeBSD__) || defined(__sun__) |
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#define USE_NANOSLEEP |
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#elif defined(HAVE_PTHREADS) && defined(sgi) |
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// SGI pthreads has a bug when using pthreads+signals+nanosleep, |
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// so instead of using nanosleep, wait on a CV which is never signalled. |
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#include <pthread.h> |
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#define USE_COND_TIMEDWAIT |
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#endif |
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|
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void Delay_usec(uint32 usec) |
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{ |
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int was_error; |
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|
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#if defined(USE_NANOSLEEP) |
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struct timespec elapsed, tv; |
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#elif defined(USE_COND_TIMEDWAIT) |
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// Use a local mutex and cv, so threads remain independent |
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pthread_cond_t delay_cond = PTHREAD_COND_INITIALIZER; |
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pthread_mutex_t delay_mutex = PTHREAD_MUTEX_INITIALIZER; |
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struct timespec elapsed; |
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uint64 future; |
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#else |
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struct timeval tv; |
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#ifndef SELECT_SETS_REMAINING |
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uint64 then, now, elapsed; |
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#endif |
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#endif |
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|
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// Set the timeout interval - Linux only needs to do this once |
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#if defined(SELECT_SETS_REMAINING) |
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tv.tv_sec = 0; |
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tv.tv_usec = usec; |
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#elif defined(USE_NANOSLEEP) |
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elapsed.tv_sec = 0; |
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elapsed.tv_nsec = usec * 1000; |
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#elif defined(USE_COND_TIMEDWAIT) |
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future = GetTicks_usec() + usec; |
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elapsed.tv_sec = future / 1000000; |
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elapsed.tv_nsec = (future % 1000000) * 1000; |
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#else |
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then = GetTicks_usec(); |
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#endif |
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|
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do { |
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errno = 0; |
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#if defined(USE_NANOSLEEP) |
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tv.tv_sec = elapsed.tv_sec; |
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tv.tv_nsec = elapsed.tv_nsec; |
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was_error = nanosleep(&tv, &elapsed); |
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#elif defined(USE_COND_TIMEDWAIT) |
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was_error = pthread_mutex_lock(&delay_mutex); |
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was_error = pthread_cond_timedwait(&delay_cond, &delay_mutex, &elapsed); |
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was_error = pthread_mutex_unlock(&delay_mutex); |
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#else |
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#ifndef SELECT_SETS_REMAINING |
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// Calculate the time interval left (in case of interrupt) |
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now = GetTicks_usec(); |
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elapsed = now - then; |
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then = now; |
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if (elapsed >= usec) |
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break; |
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usec -= elapsed; |
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tv.tv_sec = 0; |
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tv.tv_usec = usec; |
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#endif |
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was_error = select(0, NULL, NULL, NULL, &tv); |
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#endif |
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} while (was_error && (errno == EINTR)); |
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} |
