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947 | trimarchi | 1 | /*---------------------------------------------------------------------------- |
2 | *------------------------- M a R T E O S ------------------------ |
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3 | *---------------------------------------------------------------------------- |
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4 | * V1.0 Dec 2001 |
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5 | * |
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6 | * 't i m e s p e c _ o p e r a t i o n s' |
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7 | * |
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8 | * H |
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9 | * |
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10 | * File 'timespec_operations.h' by MAR. |
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11 | * (july 2002) transformed into macros by Jul. |
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12 | * Some basic operations with the type 'timespec'. |
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13 | * |
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14 | * ---------------------------------------------------------------------- |
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15 | * Copyright (C) 2001 Universidad de Cantabria, SPAIN |
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16 | * |
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17 | * Authors: Mario Aldea Rivas aldeam@ctr.unican.es |
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18 | * Michael Gonzalez Harbour mgh@ctr.unican.es |
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19 | * |
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20 | * MaRTE OS is free software; you can redistribute it and/or modify it |
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21 | * under the terms of the GNU General Public License as published by the |
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22 | * Free Software Foundation; either version 2, or (at your option) any |
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23 | * later version. |
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24 | * |
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25 | * MaRTE OS is distributed in the hope that it will be useful, but |
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26 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
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27 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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28 | * General Public License for more details. |
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29 | * |
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30 | * You should have received a copy of the GNU General Public License |
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31 | * distributed with MaRTE OS; see file COPYING. If not, write to the |
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32 | * Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA |
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33 | * 02111-1307, USA. |
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34 | * |
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35 | * As a special exception, if you link this unit with other files to |
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36 | * produce an executable, this unit does not by itself cause the |
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37 | * resulting executable to be covered by the GNU General Public License. |
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38 | * This exception does not however invalidate any other reasons why the |
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39 | * executable file might be covered by the GNU Public License. |
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40 | * |
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41 | *---------------------------------------------------------------------------*/ |
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42 | |||
43 | #ifndef _MARTE_MISC_TIMESPEC_OPERATIONS_H_ |
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44 | #define _MARTE_MISC_TIMESPEC_OPERATIONS_H_ |
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45 | |||
46 | #include <time.h> |
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47 | |||
48 | #define smaller_timespec(t1, t2) \ |
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49 | ( \ |
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50 | (t1)->tv_sec < (t2)->tv_sec || ((t1)->tv_sec == (t2)->tv_sec && \ |
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51 | (t1)->tv_nsec < (t2)->tv_nsec) \ |
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52 | ) |
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53 | |||
54 | #define smaller_or_equal_timespec(t1, t2) \ |
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55 | ( \ |
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56 | (t1)->tv_sec < (t2)->tv_sec || ((t1)->tv_sec == (t2)->tv_sec && \ |
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57 | (t1)->tv_nsec <= (t2)->tv_nsec) \ |
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58 | ) |
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59 | |||
60 | #define incr_timespec(t1, t2) \ |
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61 | { \ |
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62 | (t1)->tv_sec += (t2)->tv_sec; \ |
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63 | (t1)->tv_nsec += (t2)->tv_nsec; \ |
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64 | if ((t1)->tv_nsec >= 1000000000) { \ |
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65 | (t1)->tv_sec ++; \ |
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66 | (t1)->tv_nsec -= 1000000000; \ |
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67 | } \ |
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68 | } |
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69 | |||
70 | #define decr_timespec(t1, t2) \ |
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71 | { \ |
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72 | if ((t1)->tv_nsec < (t2)->tv_nsec) { \ |
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73 | (t1)->tv_sec -= (t2)->tv_sec + 1; \ |
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74 | (t1)->tv_nsec = (t1)->tv_nsec + 1000000000 - (t2)->tv_nsec; \ |
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75 | } else { \ |
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76 | (t1)->tv_sec -= (t2)->tv_sec; \ |
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77 | (t1)->tv_nsec -= (t2)->tv_nsec; \ |
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78 | } \ |
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79 | } |
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80 | |||
81 | |||
82 | #define add_timespec( sum , t1 , t2 ) \ |
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83 | { \ |
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84 | (sum)->tv_sec = (t1)->tv_sec + (t2)->tv_sec; \ |
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85 | (sum)->tv_nsec = (t1)->tv_nsec + (t2)->tv_nsec; \ |
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86 | if ((sum)->tv_nsec >= 1000000000) { \ |
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87 | (sum)->tv_sec ++; \ |
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88 | (sum)->tv_nsec -= 1000000000; \ |
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89 | } \ |
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90 | } |
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91 | |||
92 | #define float_to_timespec( f1 , t1 ) \ |
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93 | ( \ |
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94 | (t1)->tv_sec = (int)(f1), \ |
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95 | (t1)->tv_nsec = (int)(((f1)-(float)((t1)->tv_sec))*1000000000.0), \ |
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96 | (t1) \ |
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97 | ) |
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98 | |||
99 | #define float_to_timespec_value(f1, t1) \ |
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100 | ( \ |
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101 | (t1).tv_sec = (int)(f1), \ |
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102 | (t1).tv_nsec = (int)(((f1)-(float)((t1).tv_sec))*1000000000.0), \ |
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103 | (t1) \ |
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104 | ) |
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105 | |||
106 | #endif /* _MARTE_MISC_TIMESPEC_OPERATIONS_H_ */ |
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107 |