1 #ifndef footimevalhfoo 2 #define footimevalhfoo 3 4 /*** 5 This file is part of avahi. 6 7 avahi is free software; you can redistribute it and/or modify it 8 under the terms of the GNU Lesser General Public License as 9 published by the Free Software Foundation; either version 2.1 of the 10 License, or (at your option) any later version. 11 12 avahi is distributed in the hope that it will be useful, but WITHOUT 13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY 14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General 15 Public License for more details. 16 17 You should have received a copy of the GNU Lesser General Public 18 License along with avahi; if not, write to the Free Software 19 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 20 USA. 21 ***/ 22 23 /** \file timeval.h Functions to facilitate timeval handling */ 24 25 #include <inttypes.h> 26 #include <sys/time.h> 27 28 #include <avahi-common/cdecl.h> 29 30 AVAHI_C_DECL_BEGIN 31 32 /** A numeric data type for storing microsecond values. (signed 64bit integer) */ 33 typedef int64_t AvahiUsec; 34 35 /** Compare two timeval structures and return a negative value when a < b, 0 when a == b and a positive value otherwise */ 36 int avahi_timeval_compare(const struct timeval *a, const struct timeval *b); 37 38 /** Calculate the difference between two timeval structures as microsecond value */ 39 AvahiUsec avahi_timeval_diff(const struct timeval *a, const struct timeval *b); 40 41 /** Add a number of microseconds to the specified timeval structure and return it. *a is modified. */ 42 struct timeval* avahi_timeval_add(struct timeval *a, AvahiUsec usec); 43 44 /** Return the difference between the current time and *a. Positive if *a was earlier */ 45 AvahiUsec avahi_age(const struct timeval *a); 46 47 /** Fill *tv with the current time plus "ms" milliseconds plus an 48 * extra jitter of "j" milliseconds. Pass 0 for j if you don't want 49 * the jitter */ 50 struct timeval *avahi_elapse_time(struct timeval *tv, unsigned ms, unsigned j); 51 52 AVAHI_C_DECL_END 53 54 #endif 55
