src/Unix/timer_unix.cpp

/*
 *  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)
 */

const uint32 TIME_OFFSET = 0x7c25cca0;  // Offset Mac->Unix time in seconds

uint32 TimerDateTime(void)
{
        time_t uct_now = time(NULL);
        struct tm tm;
        localtime_r(&uct_now, &tm);
        time_t local_now = mktime(&tm);
        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
        }
}
Revision:	1.1
Committed:	1999-10-03T14:16:25Z (24 years, 9 months ago) by cebix
Branch:	MAIN
Branch point for:	cebix
Log Message:	Initial revision
#	User	Rev	Content
1	cebix	1.1	/*
2			* timer_unix.cpp - Time Manager emulation, Unix specific stuff
3			*
4			* Basilisk II (C) 1997-1999 Christian Bauer
5			*
6			* This program is free software; you can redistribute it and/or modify
7			* it under the terms of the GNU General Public License as published by
8			* the Free Software Foundation; either version 2 of the License, or
9			* (at your option) any later version.
10			*
11			* This program is distributed in the hope that it will be useful,
12			* but WITHOUT ANY WARRANTY; without even the implied warranty of
13			* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14			* GNU General Public License for more details.
15			*
16			* You should have received a copy of the GNU General Public License
17			* along with this program; if not, write to the Free Software
18			* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19			*/
20
21			#include "sysdeps.h"
22			#include "timer.h"
23
24			#define DEBUG 0
25			#include "debug.h"
26
27
28			/*
29			* Return microseconds since boot (64 bit)
30			*/
31
32			void Microseconds(uint32 &hi, uint32 &lo)
33			{
34			D(bug("Microseconds\n"));
35			#ifdef HAVE_CLOCK_GETTIME
36			struct timespec t;
37			clock_gettime(CLOCK_REALTIME, &t);
38			uint64 tl = (uint64)t.tv_sec * 1000000 + t.tv_nsec / 1000;
39			#else
40			struct timeval t;
41			gettimeofday(&t, NULL);
42			uint64 tl = (uint64)t.tv_sec * 1000000 + t.tv_usec;
43			#endif
44			hi = tl >> 32;
45			lo = tl;
46			}
47
48
49			/*
50			* Return local date/time in Mac format (seconds since 1.1.1904)
51			*/
52
53			const uint32 TIME_OFFSET = 0x7c25cca0; // Offset Mac->Unix time in seconds
54
55			uint32 TimerDateTime(void)
56			{
57			time_t uct_now = time(NULL);
58			struct tm tm;
59			localtime_r(&uct_now, &tm);
60			time_t local_now = mktime(&tm);
61			return (uint32)local_now + TIME_OFFSET;
62			}
63
64
65			/*
66			* Get current time
67			*/
68
69			void timer_current_time(tm_time_t &t)
70			{
71			#ifdef HAVE_CLOCK_GETTIME
72			clock_gettime(CLOCK_REALTIME, &t);
73			#else
74			gettimeofday(&t, NULL);
75			#endif
76			}
77
78
79			/*
80			* Add times
81			*/
82
83			void timer_add_time(tm_time_t &res, tm_time_t a, tm_time_t b)
84			{
85			#ifdef HAVE_CLOCK_GETTIME
86			res.tv_sec = a.tv_sec + b.tv_sec;
87			res.tv_nsec = a.tv_nsec + b.tv_nsec;
88			if (res.tv_nsec >= 1000000000) {
89			res.tv_sec++;
90			res.tv_nsec -= 1000000000;
91			}
92			#else
93			res.tv_sec = a.tv_sec + b.tv_sec;
94			res.tv_usec = a.tv_usec + b.tv_usec;
95			if (res.tv_usec >= 1000000) {
96			res.tv_sec++;
97			res.tv_usec -= 1000000;
98			}
99			#endif
100			}
101
102
103			/*
104			* Subtract times
105			*/
106
107			void timer_sub_time(tm_time_t &res, tm_time_t a, tm_time_t b)
108			{
109			#ifdef HAVE_CLOCK_GETTIME
110			res.tv_sec = a.tv_sec - b.tv_sec;
111			res.tv_nsec = a.tv_nsec - b.tv_nsec;
112			if (res.tv_nsec < 0) {
113			res.tv_sec--;
114			res.tv_nsec += 1000000000;
115			}
116			#else
117			res.tv_sec = a.tv_sec - b.tv_sec;
118			res.tv_usec = a.tv_usec - b.tv_usec;
119			if (res.tv_usec < 0) {
120			res.tv_sec--;
121			res.tv_usec += 1000000;
122			}
123			#endif
124			}
125
126
127			/*
128			* Compare times (<0: a < b, =0: a = b, >0: a > b)
129			*/
130
131			int timer_cmp_time(tm_time_t a, tm_time_t b)
132			{
133			#ifdef HAVE_CLOCK_GETTIME
134			if (a.tv_sec == b.tv_sec)
135			return a.tv_nsec - b.tv_nsec;
136			else
137			return a.tv_sec - b.tv_sec;
138			#else
139			if (a.tv_sec == b.tv_sec)
140			return a.tv_usec - b.tv_usec;
141			else
142			return a.tv_sec - b.tv_sec;
143			#endif
144			}
145
146
147			/*
148			* Convert Mac time value (>0: microseconds, <0: microseconds) to tm_time_t
149			*/
150
151			void timer_mac2host_time(tm_time_t &res, int32 mactime)
152			{
153			#ifdef HAVE_CLOCK_GETTIME
154			if (mactime > 0) {
155			// Time in milliseconds
156			res.tv_sec = mactime / 1000;
157			res.tv_nsec = (mactime % 1000) * 1000000;
158			} else {
159			// Time in negative microseconds
160			res.tv_sec = -mactime / 1000000;
161			res.tv_nsec = (-mactime % 1000000) * 1000;
162			}
163			#else
164			if (mactime > 0) {
165			// Time in milliseconds
166			res.tv_sec = mactime / 1000;
167			res.tv_usec = (mactime % 1000) * 1000;
168			} else {
169			// Time in negative microseconds
170			res.tv_sec = -mactime / 1000000;
171			res.tv_usec = -mactime % 1000000;
172			}
173			#endif
174			}
175
176
177			/*
178			* Convert positive tm_time_t to Mac time value (>0: microseconds, <0: microseconds)
179			* A negative input value for hosttime results in a zero return value
180			* As long as the microseconds value fits in 32 bit, it must not be converted to milliseconds!
181			*/
182
183			int32 timer_host2mac_time(tm_time_t hosttime)
184			{
185			if (hosttime.tv_sec < 0)
186			return 0;
187			else {
188			#ifdef HAVE_CLOCK_GETTIME
189			uint64 t = (uint64)hosttime.tv_sec * 1000000 + hosttime.tv_nsec / 1000;
190			#else
191			uint64 t = (uint64)hosttime.tv_sec * 1000000 + hosttime.tv_usec;
192			#endif
193			if (t > 0x7fffffff)
194			return t / 1000; // Time in milliseconds
195			else
196			return -t; // Time in negative microseconds
197			}
198			}