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.
25 typedef struct _LttTime
{
27 unsigned long tv_nsec
;
31 static const unsigned long NANOSECONDS_PER_SECOND
= 1000000000;
33 static const LttTime ltt_time_zero
= { 0, 0};
35 static const LttTime ltt_time_one
= { 0, 1 };
37 static const LttTime ltt_time_infinite
= { G_MAXUINT
, G_MAXUINT
};
39 static inline LttTime
ltt_time_sub(LttTime t1
, LttTime t2
)
42 res
.tv_sec
= t1
.tv_sec
- t2
.tv_sec
;
43 if(t1
.tv_nsec
< t2
.tv_nsec
) {
45 res
.tv_nsec
= NANOSECONDS_PER_SECOND
+ t1
.tv_nsec
- t2
.tv_nsec
;
48 res
.tv_nsec
= t1
.tv_nsec
- t2
.tv_nsec
;
54 static inline LttTime
ltt_time_add(LttTime t1
, LttTime t2
)
57 res
.tv_sec
= t1
.tv_sec
+ t2
.tv_sec
;
58 res
.tv_nsec
= t1
.tv_nsec
+ t2
.tv_nsec
;
59 if(res
.tv_nsec
>= NANOSECONDS_PER_SECOND
) {
61 res
.tv_nsec
-= NANOSECONDS_PER_SECOND
;
67 static inline LttTime
ltt_time_mul(LttTime t1
, float f
)
78 sec
= t1
.tv_sec
/ (double)d
;
80 res
.tv_nsec
= t1
.tv_nsec
/ (double)d
+ (sec
- res
.tv_sec
) *
81 NANOSECONDS_PER_SECOND
;
82 res
.tv_sec
+= res
.tv_nsec
/ NANOSECONDS_PER_SECOND
;
83 res
.tv_nsec
%= NANOSECONDS_PER_SECOND
;
89 static inline LttTime
ltt_time_div(LttTime t1
, float f
)
94 sec
= t1
.tv_sec
/ (double)f
;
96 res
.tv_nsec
= t1
.tv_nsec
/ (double)f
+ (sec
- res
.tv_sec
) *
97 NANOSECONDS_PER_SECOND
;
98 res
.tv_sec
+= res
.tv_nsec
/ NANOSECONDS_PER_SECOND
;
99 res
.tv_nsec
%= NANOSECONDS_PER_SECOND
;
104 static inline int ltt_time_compare(LttTime t1
, LttTime t2
)
106 if(t1
.tv_sec
> t2
.tv_sec
) return 1;
107 if(t1
.tv_sec
< t2
.tv_sec
) return -1;
108 if(t1
.tv_nsec
> t2
.tv_nsec
) return 1;
109 if(t1
.tv_nsec
< t2
.tv_nsec
) return -1;
114 static inline double ltt_time_to_double(LttTime t1
)
116 return (double)t1
.tv_sec
+ (double)t1
.tv_nsec
/ NANOSECONDS_PER_SECOND
;
120 static inline LttTime
ltt_time_from_double(double t1
)
124 res
.tv_nsec
= (t1
- res
.tv_sec
) * NANOSECONDS_PER_SECOND
;