1f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch/* 2f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * libjingle 3f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * Copyright 2004--2005, Google Inc. 4f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 5f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * Redistribution and use in source and binary forms, with or without 6f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * modification, are permitted provided that the following conditions are met: 7f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 8f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 1. Redistributions of source code must retain the above copyright notice, 9f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * this list of conditions and the following disclaimer. 10f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 2. Redistributions in binary form must reproduce the above copyright notice, 11f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * this list of conditions and the following disclaimer in the documentation 12f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * and/or other materials provided with the distribution. 13f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 3. The name of the author may not be used to endorse or promote products 14f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * derived from this software without specific prior written permission. 15f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * 16f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 17f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 18f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 19f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 20f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 21f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 22f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 23f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 24f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 25f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch */ 27f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 28f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#ifndef TALK_BASE_TIME_H__ 29f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#define TALK_BASE_TIME_H__ 30f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 31f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#ifndef WIN32 32f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#include_next <time.h> 33f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#endif 34f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 35f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#include "talk/base/basictypes.h" 36f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 37f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochnamespace talk_base { 38f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 39f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochtypedef uint32 TimeStamp; 40f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 41f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// Returns the current time in milliseconds. 42f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochuint32 Time(); 43f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 44f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// Approximate time when the program started. 45f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochuint32 StartTime(); 46f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 47f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// Returns a future timestamp, 'elapsed' milliseconds from now. 48f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochuint32 TimeAfter(int32 elapsed); 49f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 50f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// Comparisons between time values, which can wrap around. 51f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochbool TimeIsBetween(uint32 earlier, uint32 middle, uint32 later); // Inclusive 52f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochbool TimeIsLaterOrEqual(uint32 earlier, uint32 later); // Inclusive 53f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochbool TimeIsLater(uint32 earlier, uint32 later); // Exclusive 54f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 55f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// Returns the later of two timestamps. 56f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline uint32 TimeMax(uint32 ts1, uint32 ts2) { 57f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return TimeIsLaterOrEqual(ts1, ts2) ? ts2 : ts1; 58f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 59f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 60f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// Returns the earlier of two timestamps. 61f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline uint32 TimeMin(uint32 ts1, uint32 ts2) { 62f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return TimeIsLaterOrEqual(ts1, ts2) ? ts1 : ts2; 63f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 64f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 65f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// Number of milliseconds that would elapse between 'earlier' and 'later' 66f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// timestamps. The value is negative if 'later' occurs before 'earlier'. 67f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochint32 TimeDiff(uint32 later, uint32 earlier); 68f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 69f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// The number of milliseconds that have elapsed since 'earlier'. 70f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline int32 TimeSince(uint32 earlier) { 71f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return TimeDiff(Time(), earlier); 72f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 73f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 74f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch// The number of milliseconds that will elapse between now and 'later'. 75f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdochinline int32 TimeUntil(uint32 later) { 76f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch return TimeDiff(later, Time()); 77f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} 78f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 79f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch} // namespace talk_base 80f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch 81f74420b3285b9fe04a7e00aa3b8c0ab07ea344bcBen Murdoch#endif // TALK_BASE_TIME_H__ 82