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| 1 /* | |
| 2 * Copyright (C) 2006 Apple Computer, Inc. All rights reserved. | |
| 3 * Copyright (C) 2008 Google Inc. All rights reserved. | |
| 4 * | |
| 5 * Redistribution and use in source and binary forms, with or without | |
| 6 * modification, are permitted provided that the following conditions are | |
| 7 * met: | |
| 8 * | |
| 9 * * Redistributions of source code must retain the above copyright | |
| 10 * notice, this list of conditions and the following disclaimer. | |
| 11 * * Redistributions in binary form must reproduce the above | |
| 12 * copyright notice, this list of conditions and the following disclaimer | |
| 13 * in the documentation and/or other materials provided with the | |
| 14 * distribution. | |
| 15 * * Neither the name of Google Inc. nor the names of its | |
| 16 * contributors may be used to endorse or promote products derived from | |
| 17 * this software without specific prior written permission. | |
| 18 * | |
| 19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
| 20 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
| 21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
| 22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
| 23 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
| 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
| 25 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
| 29 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 30 */ | |
| 31 | |
| 32 #ifndef CurrentTime_h | |
| 33 #define CurrentTime_h | |
| 34 | |
| 35 #include <time.h> | |
| 36 | |
| 37 namespace WTF { | |
| 38 | |
| 39 // Returns the current UTC time in seconds, counted from January 1, 1970. | |
| 40 // Precision varies depending on platform but is usually as good or better | |
| 41 // than a millisecond. | |
| 42 WTF_EXPORT_PRIVATE double currentTime(); | |
| 43 | |
| 44 // Same thing, in milliseconds. | |
| 45 inline double currentTimeMS() | |
| 46 { | |
| 47 return currentTime() * 1000.0; | |
| 48 } | |
| 49 | |
| 50 // Provides a monotonically increasing time in seconds since an arbitrary point
in the past. | |
| 51 // On unsupported platforms, this function only guarantees the result will be no
n-decreasing. | |
| 52 WTF_EXPORT_PRIVATE double monotonicallyIncreasingTime(); | |
| 53 | |
| 54 } // namespace WTF | |
| 55 | |
| 56 using WTF::currentTime; | |
| 57 using WTF::currentTimeMS; | |
| 58 using WTF::monotonicallyIncreasingTime; | |
| 59 | |
| 60 #endif // CurrentTime_h | |
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