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1 | /* This file is part of the Linux Trace Toolkit trace reading library |
2 | * Copyright (C) 2003-2004 Michel Dagenais |
3 | * |
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. |
7 | * |
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. |
12 | * |
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. |
17 | */ |
18 | |
308711e5 |
19 | #ifndef LTT_TIME_H |
20 | #define LTT_TIME_H |
21 | |
a00149f6 |
22 | #include <glib.h> |
23 | |
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24 | |
25 | typedef struct _LttTime { |
26 | unsigned long tv_sec; |
27 | unsigned long tv_nsec; |
28 | } LttTime; |
29 | |
30 | |
31 | static const unsigned long NANOSECONDS_PER_SECOND = 1000000000; |
32 | |
33 | static const LttTime ltt_time_zero = { 0, 0}; |
34 | |
a00149f6 |
35 | static const LttTime ltt_time_infinite = { G_MAXUINT, G_MAXUINT }; |
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36 | |
37 | static inline LttTime ltt_time_sub(LttTime t1, LttTime t2) |
38 | { |
39 | LttTime res; |
40 | res.tv_sec = t1.tv_sec - t2.tv_sec; |
41 | if(t1.tv_nsec < t2.tv_nsec) { |
42 | res.tv_sec--; |
43 | res.tv_nsec = NANOSECONDS_PER_SECOND + t1.tv_nsec - t2.tv_nsec; |
44 | } |
45 | else { |
46 | res.tv_nsec = t1.tv_nsec - t2.tv_nsec; |
47 | } |
48 | return res; |
49 | } |
50 | |
51 | |
52 | static inline LttTime ltt_time_add(LttTime t1, LttTime t2) |
53 | { |
54 | LttTime res; |
55 | res.tv_sec = t1.tv_sec + t2.tv_sec; |
56 | res.tv_nsec = t1.tv_nsec + t2.tv_nsec; |
57 | if(res.tv_nsec >= NANOSECONDS_PER_SECOND) { |
58 | res.tv_sec++; |
59 | res.tv_nsec -= NANOSECONDS_PER_SECOND; |
60 | } |
61 | return res; |
62 | } |
63 | |
64 | |
65 | static inline LttTime ltt_time_mul(LttTime t1, float f) |
66 | { |
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67 | LttTime res; |
e17c04d2 |
68 | float d; |
1f1ae829 |
69 | double sec; |
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70 | |
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71 | if(f == 0.0){ |
72 | res.tv_sec = 0; |
73 | res.tv_nsec = 0; |
74 | }else{ |
e17c04d2 |
75 | d = 1.0/f; |
1f1ae829 |
76 | sec = t1.tv_sec / (double)d; |
77 | res.tv_sec = sec; |
78 | res.tv_nsec = t1.tv_nsec / (double)d + (sec - res.tv_sec) * |
79 | NANOSECONDS_PER_SECOND; |
80 | res.tv_sec += res.tv_nsec / NANOSECONDS_PER_SECOND; |
81 | res.tv_nsec %= NANOSECONDS_PER_SECOND; |
82 | } |
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83 | return res; |
84 | } |
85 | |
86 | |
87 | static inline LttTime ltt_time_div(LttTime t1, float f) |
88 | { |
89 | double sec; |
90 | LttTime res; |
91 | |
92 | sec = t1.tv_sec / (double)f; |
93 | res.tv_sec = sec; |
94 | res.tv_nsec = t1.tv_nsec / (double)f + (sec - res.tv_sec) * |
95 | NANOSECONDS_PER_SECOND; |
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96 | res.tv_sec += res.tv_nsec / NANOSECONDS_PER_SECOND; |
97 | res.tv_nsec %= NANOSECONDS_PER_SECOND; |
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98 | return res; |
99 | } |
100 | |
101 | |
102 | static inline int ltt_time_compare(LttTime t1, LttTime t2) |
103 | { |
104 | if(t1.tv_sec > t2.tv_sec) return 1; |
105 | if(t1.tv_sec < t2.tv_sec) return -1; |
106 | if(t1.tv_nsec > t2.tv_nsec) return 1; |
107 | if(t1.tv_nsec < t2.tv_nsec) return -1; |
108 | return 0; |
109 | } |
110 | |
111 | |
112 | static inline double ltt_time_to_double(LttTime t1) |
113 | { |
114 | return (double)t1.tv_sec + (double)t1.tv_nsec / NANOSECONDS_PER_SECOND; |
115 | } |
116 | |
117 | |
118 | static inline LttTime ltt_time_from_double(double t1) |
119 | { |
120 | LttTime res; |
121 | res.tv_sec = t1; |
122 | res.tv_nsec = (t1 - res.tv_sec) * NANOSECONDS_PER_SECOND; |
123 | return res; |
124 | } |
125 | |
126 | #endif // LTT_TIME_H |