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2010-10-04 initial import.
1 /* Copyright (C) 1991-1994,96,97,98,99,2000,01,02
2 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
18 02111-1307 USA. */
19
20 /* never worry about timersub type activies again -- from GLIBC and upcased. */
21 #define TIMERSUB(a, b, result) \
22 do { \
23 (result)->tv_sec = (a)->tv_sec - (b)->tv_sec; \
24 (result)->tv_usec = (a)->tv_usec - (b)->tv_usec; \
25 if ((result)->tv_usec < 0) { \
26 --(result)->tv_sec; \
27 (result)->tv_usec += 1000000; \
28 } \
29 } while (0)
30
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