1 /* This file is part of the Linux Trace Toolkit trace reading library
2 * Copyright (C) 2003-2004 Michel Dagenais
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Lesser General Public
6 * License Version 2.1 as published by the Free Software Foundation.
8 * This library is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 * Lesser General Public License for more details.
13 * You should have received a copy of the GNU Lesser General Public
14 * License along with this library; if not, write to the
15 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
16 * Boston, MA 02111-1307, USA.
23 typedef struct _LttTime
{
25 unsigned long tv_nsec
;
29 static const unsigned long NANOSECONDS_PER_SECOND
= 1000000000;
31 static const LttTime ltt_time_zero
= { 0, 0};
34 static inline LttTime
ltt_time_sub(LttTime t1
, LttTime t2
)
37 res
.tv_sec
= t1
.tv_sec
- t2
.tv_sec
;
38 if(t1
.tv_nsec
< t2
.tv_nsec
) {
40 res
.tv_nsec
= NANOSECONDS_PER_SECOND
+ t1
.tv_nsec
- t2
.tv_nsec
;
43 res
.tv_nsec
= t1
.tv_nsec
- t2
.tv_nsec
;
49 static inline LttTime
ltt_time_add(LttTime t1
, LttTime t2
)
52 res
.tv_sec
= t1
.tv_sec
+ t2
.tv_sec
;
53 res
.tv_nsec
= t1
.tv_nsec
+ t2
.tv_nsec
;
54 if(res
.tv_nsec
>= NANOSECONDS_PER_SECOND
) {
56 res
.tv_nsec
-= NANOSECONDS_PER_SECOND
;
62 static inline LttTime
ltt_time_mul(LttTime t1
, float f
)
73 sec
= t1
.tv_sec
/ (double)d
;
75 res
.tv_nsec
= t1
.tv_nsec
/ (double)d
+ (sec
- res
.tv_sec
) *
76 NANOSECONDS_PER_SECOND
;
77 res
.tv_sec
+= res
.tv_nsec
/ NANOSECONDS_PER_SECOND
;
78 res
.tv_nsec
%= NANOSECONDS_PER_SECOND
;
84 static inline LttTime
ltt_time_div(LttTime t1
, float f
)
89 sec
= t1
.tv_sec
/ (double)f
;
91 res
.tv_nsec
= t1
.tv_nsec
/ (double)f
+ (sec
- res
.tv_sec
) *
92 NANOSECONDS_PER_SECOND
;
93 res
.tv_sec
+= res
.tv_nsec
/ NANOSECONDS_PER_SECOND
;
94 res
.tv_nsec
%= NANOSECONDS_PER_SECOND
;
99 static inline int ltt_time_compare(LttTime t1
, LttTime t2
)
101 if(t1
.tv_sec
> t2
.tv_sec
) return 1;
102 if(t1
.tv_sec
< t2
.tv_sec
) return -1;
103 if(t1
.tv_nsec
> t2
.tv_nsec
) return 1;
104 if(t1
.tv_nsec
< t2
.tv_nsec
) return -1;
109 static inline double ltt_time_to_double(LttTime t1
)
111 return (double)t1
.tv_sec
+ (double)t1
.tv_nsec
/ NANOSECONDS_PER_SECOND
;
115 static inline LttTime
ltt_time_from_double(double t1
)
119 res
.tv_nsec
= (t1
- res
.tv_sec
) * NANOSECONDS_PER_SECOND
;
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