2 // timestamp.hxx -- class for managing a timestamp (seconds & milliseconds.)
4 // Written by Curtis Olson, started December 1998.
6 // Copyright (C) 1998 Curtis L. Olson - curt@flightgear.org
8 // This program is free software; you can redistribute it and/or
9 // modify it under the terms of the GNU General Public License as
10 // published by the Free Software Foundation; either version 2 of the
11 // License, or (at your option) any later version.
13 // This program is distributed in the hope that it will be useful, but
14 // WITHOUT ANY WARRANTY; without even the implied warranty of
15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 // General Public License for more details.
18 // You should have received a copy of the GNU General Public License
19 // along with this program; if not, write to the Free Software
20 // Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #ifndef _TIMESTAMP_HXX
26 #define _TIMESTAMP_HXX
30 # error This library requires C++
42 #include "Include/compiler.h"
43 #ifdef FG_HAVE_STD_INCLUDES
49 #ifdef HAVE_SYS_TIMEB_H
50 # include <sys/timeb.h> // for ftime() and struct timeb
53 # include <unistd.h> // for gettimeofday()
55 #ifdef HAVE_SYS_TIME_H
56 # include <sys/time.h> // for get/setitimer, gettimeofday, struct timeval
61 # if defined( __CYGWIN__ ) || defined( __CYGWIN32__ )
65 # include <mmsystem.h>
68 // MSVC++ 6.0 kuldge - Need forward declaration of friends.
70 FGTimeStamp operator + (const FGTimeStamp& t, const long& m);
71 long operator - (const FGTimeStamp& a, const FGTimeStamp& b);
83 FGTimeStamp( const long s, const long m );
86 // Set time to current time
89 FGTimeStamp& operator = ( const FGTimeStamp& t );
91 friend FGTimeStamp operator + (const FGTimeStamp& t, const long& m);
92 friend long operator - (const FGTimeStamp& a, const FGTimeStamp& b);
94 inline long get_seconds() const { return seconds; }
95 // inline long get_usec() const { return usec; }
98 inline FGTimeStamp::FGTimeStamp() {
101 inline FGTimeStamp::FGTimeStamp( const long s, const long u ) {
106 inline FGTimeStamp::~FGTimeStamp() {
109 inline FGTimeStamp& FGTimeStamp::operator = (const FGTimeStamp& t)
116 inline void FGTimeStamp::stamp() {
122 #elif defined( HAVE_GETTIMEOFDAY )
123 struct timeval current;
125 // fg_timestamp currtime;
126 gettimeofday(¤t, &tz);
127 seconds = current.tv_sec;
128 usec = current.tv_usec;
129 #elif defined( HAVE_GETLOCALTIME )
131 GetLocalTime(¤t);
132 seconds = current.wSecond;
133 usec = current.wMilliseconds * 1000;
134 #elif defined( HAVE_FTIME )
135 struct timeb current;
137 seconds = current.time;
138 usec = current.millitm * 1000;
144 // difference between time stamps in microseconds (usec)
145 inline FGTimeStamp operator + (const FGTimeStamp& t, const long& m) {
147 return FGTimeStamp( 0, t.usec + m );
149 return FGTimeStamp( t.seconds + ( t.usec + m ) / 1000000,
150 ( t.usec + m ) % 1000000 );
154 // difference between time stamps in microseconds (usec)
155 inline long operator - (const FGTimeStamp& a, const FGTimeStamp& b)
158 return a.usec - b.usec;
160 return 1000000 * (a.seconds - b.seconds) + (a.usec - b.usec);
165 #endif // _TIMESTAMP_HXX