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)
 */

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
        }
}
Revision:	1.5
Committed:	1999-10-19T17:41:39Z (24 years, 8 months ago) by cebix
Branch:	MAIN
CVS Tags:	snapshot-21101999, snapshot-22121999, release-0_8-1, snapshot-02111999
Changes since 1.4:	+0 -2 lines
Log Message:	- added external file system - moved most init/deinit code to InitAll()/ExitAll() in main.cpp
#	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			uint32 TimerDateTime(void)
54			{
55	cebix	1.3	time_t utc_now = time(NULL);
56			#if defined(__linux__) \|\| defined(__SVR4)
57	cebix	1.2	long tz = timezone;
58	cebix	1.4	time_t local_now = utc_now - tz;
59	cebix	1.2	if (daylight)
60			local_now += 3600;
61	cebix	1.3	#elif defined(__FreeBSD__) \|\| defined(__NetBSD__)
62			time_t local_now = utc_now + localtime(&utc_now)->tm_gmtoff;
63			#else
64			time_t local_now = utc_now;
65			#endif
66	cebix	1.1	return (uint32)local_now + TIME_OFFSET;
67			}
68
69
70			/*
71			* Get current time
72			*/
73
74			void timer_current_time(tm_time_t &t)
75			{
76			#ifdef HAVE_CLOCK_GETTIME
77			clock_gettime(CLOCK_REALTIME, &t);
78			#else
79			gettimeofday(&t, NULL);
80			#endif
81			}
82
83
84			/*
85			* Add times
86			*/
87
88			void timer_add_time(tm_time_t &res, tm_time_t a, tm_time_t b)
89			{
90			#ifdef HAVE_CLOCK_GETTIME
91			res.tv_sec = a.tv_sec + b.tv_sec;
92			res.tv_nsec = a.tv_nsec + b.tv_nsec;
93			if (res.tv_nsec >= 1000000000) {
94			res.tv_sec++;
95			res.tv_nsec -= 1000000000;
96			}
97			#else
98			res.tv_sec = a.tv_sec + b.tv_sec;
99			res.tv_usec = a.tv_usec + b.tv_usec;
100			if (res.tv_usec >= 1000000) {
101			res.tv_sec++;
102			res.tv_usec -= 1000000;
103			}
104			#endif
105			}
106
107
108			/*
109			* Subtract times
110			*/
111
112			void timer_sub_time(tm_time_t &res, tm_time_t a, tm_time_t b)
113			{
114			#ifdef HAVE_CLOCK_GETTIME
115			res.tv_sec = a.tv_sec - b.tv_sec;
116			res.tv_nsec = a.tv_nsec - b.tv_nsec;
117			if (res.tv_nsec < 0) {
118			res.tv_sec--;
119			res.tv_nsec += 1000000000;
120			}
121			#else
122			res.tv_sec = a.tv_sec - b.tv_sec;
123			res.tv_usec = a.tv_usec - b.tv_usec;
124			if (res.tv_usec < 0) {
125			res.tv_sec--;
126			res.tv_usec += 1000000;
127			}
128			#endif
129			}
130
131
132			/*
133			* Compare times (<0: a < b, =0: a = b, >0: a > b)
134			*/
135
136			int timer_cmp_time(tm_time_t a, tm_time_t b)
137			{
138			#ifdef HAVE_CLOCK_GETTIME
139			if (a.tv_sec == b.tv_sec)
140			return a.tv_nsec - b.tv_nsec;
141			else
142			return a.tv_sec - b.tv_sec;
143			#else
144			if (a.tv_sec == b.tv_sec)
145			return a.tv_usec - b.tv_usec;
146			else
147			return a.tv_sec - b.tv_sec;
148			#endif
149			}
150
151
152			/*
153			* Convert Mac time value (>0: microseconds, <0: microseconds) to tm_time_t
154			*/
155
156			void timer_mac2host_time(tm_time_t &res, int32 mactime)
157			{
158			#ifdef HAVE_CLOCK_GETTIME
159			if (mactime > 0) {
160			// Time in milliseconds
161			res.tv_sec = mactime / 1000;
162			res.tv_nsec = (mactime % 1000) * 1000000;
163			} else {
164			// Time in negative microseconds
165			res.tv_sec = -mactime / 1000000;
166			res.tv_nsec = (-mactime % 1000000) * 1000;
167			}
168			#else
169			if (mactime > 0) {
170			// Time in milliseconds
171			res.tv_sec = mactime / 1000;
172			res.tv_usec = (mactime % 1000) * 1000;
173			} else {
174			// Time in negative microseconds
175			res.tv_sec = -mactime / 1000000;
176			res.tv_usec = -mactime % 1000000;
177			}
178			#endif
179			}
180
181
182			/*
183			* Convert positive tm_time_t to Mac time value (>0: microseconds, <0: microseconds)
184			* A negative input value for hosttime results in a zero return value
185			* As long as the microseconds value fits in 32 bit, it must not be converted to milliseconds!
186			*/
187
188			int32 timer_host2mac_time(tm_time_t hosttime)
189			{
190			if (hosttime.tv_sec < 0)
191			return 0;
192			else {
193			#ifdef HAVE_CLOCK_GETTIME
194			uint64 t = (uint64)hosttime.tv_sec * 1000000 + hosttime.tv_nsec / 1000;
195			#else
196			uint64 t = (uint64)hosttime.tv_sec * 1000000 + hosttime.tv_usec;
197			#endif
198			if (t > 0x7fffffff)
199			return t / 1000; // Time in milliseconds
200			else
201			return -t; // Time in negative microseconds
202			}
203			}