1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Class Poco::Timestamp</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<meta name="author" content="Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="publisher" content="Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="copyright" content="Copyright (c) 2009, Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="language" content="en"/>
<meta name="date" content="2009-11-24"/>
<meta name="generator" content="PocoDoc"/>
<link rel="stylesheet" href="css/styles.css" type="text/css"/>
</head>
<body bgcolor="#ffffff" leftmargin="0" topmargin="0">
<div class="header">
<h1 class="namespace"><a href="Poco.html" class="namespace">Poco</a></h1>
<h1 class="symbol">class Timestamp</h1>
</div>
<div class="body">
<p>
<b>Library:</b> Foundation<br />
<b>Package:</b> DateTime<br />
<b>Header:</b> Poco/Timestamp.h</p>
<h2>Description</h2>
<div class="description">
<p>A <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> stores a monotonic* time value with (theoretical) microseconds resolution. Timestamps can be compared with each other and simple arithmetics are supported. </p>
<p>[*] Note that <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> values are only monotonic as long as the systems's clock is monotonic as well (and not, e.g. set back). </p>
<p>Timestamps are UTC (Coordinated Universal Time) based and thus independent of the timezone in effect on the system. </p>
</div>
<h2>Member Summary</h2>
<p><b>Member Functions: </b><a href="Poco.Timestamp.html#11190" title="Poco::Timestamp::elapsed()">elapsed</a>, <a href="Poco.Timestamp.html#11189" title="Poco::Timestamp::epochMicroseconds()">epochMicroseconds</a>, <a href="Poco.Timestamp.html#11187" title="Poco::Timestamp::epochTime()">epochTime</a>, <a href="Poco.Timestamp.html#11193" title="Poco::Timestamp::fromEpochTime()">fromEpochTime</a>, <a href="Poco.Timestamp.html#11195" title="Poco::Timestamp::fromUtcTime()">fromUtcTime</a>, <a href="Poco.Timestamp.html#11191" title="Poco::Timestamp::isElapsed()">isElapsed</a>, <a href="Poco.Timestamp.html#11167" title="Poco::Timestamp::operator !=()">operator !=</a>, <a href="Poco.Timestamp.html#11177" title="Poco::Timestamp::operator +()">operator +</a>, <a href="Poco.Timestamp.html#11183" title="Poco::Timestamp::operator +=()">operator +=</a>, <a href="Poco.Timestamp.html#11179" title="Poco::Timestamp::operator -()">operator -</a>, <a href="Poco.Timestamp.html#11185" title="Poco::Timestamp::operator -=()">operator -=</a>, <a href="Poco.Timestamp.html#11173" title="Poco::Timestamp::operator <()">operator <</a>, <a href="Poco.Timestamp.html#11175" title="Poco::Timestamp::operator <=()">operator <=</a>, <a href="Poco.Timestamp.html#11158" title="Poco::Timestamp::operator =()">operator =</a>, <a href="Poco.Timestamp.html#11165" title="Poco::Timestamp::operator ==()">operator ==</a>, <a href="Poco.Timestamp.html#11169" title="Poco::Timestamp::operator >()">operator ></a>, <a href="Poco.Timestamp.html#11171" title="Poco::Timestamp::operator >=()">operator >=</a>, <a href="Poco.Timestamp.html#11197" title="Poco::Timestamp::resolution()">resolution</a>, <a href="Poco.Timestamp.html#11162" title="Poco::Timestamp::swap()">swap</a>, <a href="Poco.Timestamp.html#11164" title="Poco::Timestamp::update()">update</a>, <a href="Poco.Timestamp.html#11188" title="Poco::Timestamp::utcTime()">utcTime</a></p>
<h2>Types</h2>
<h3><a name="11151">TimeDiff</a></h3>
<p class="decl">typedef <a href="Poco.html#11357" title="Poco::Int64">Int64</a> <a href="Poco.Timestamp.html#11151" title="Poco::Timestamp::TimeDiff">TimeDiff</a>;</p>
<div class="description">
<p>difference between two timestamps in microseconds </p>
</div>
<h3><a name="11149">TimeVal</a></h3>
<p class="decl">typedef <a href="Poco.html#11357" title="Poco::Int64">Int64</a> <a href="Poco.Timestamp.html#11149" title="Poco::Timestamp::TimeVal">TimeVal</a>;</p>
<div class="description">
<p>monotonic UTC time value in microsecond resolution </p>
</div>
<h3><a name="11150">UtcTimeVal</a></h3>
<p class="decl">typedef <a href="Poco.html#11357" title="Poco::Int64">Int64</a> <a href="Poco.Timestamp.html#11150" title="Poco::Timestamp::UtcTimeVal">UtcTimeVal</a>;</p>
<div class="description">
<p>monotonic UTC time value in 100 nanosecond resolution </p>
</div>
<h2>Constructors</h2>
<h3><a name="11152">Timestamp</a></h3>
<p class="decl"><a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a>();</p>
<div class="description">
<p>Creates a timestamp with the current time. </p>
</div>
<h3><a name="11153">Timestamp</a></h3>
<p class="decl"><a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a>(<br /> <a href="Poco.Timestamp.html#11149" title="Poco::Timestamp::TimeVal">TimeVal</a> tv<br />);</p>
<div class="description">
<p>Creates a timestamp from the given time value. </p>
</div>
<h3><a name="11155">Timestamp</a></h3>
<p class="decl"><a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a>(<br /> const <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & other<br />);</p>
<div class="description">
<p>Copy constructor. </p>
</div>
<h2>Destructor</h2>
<h3><a name="11157">~Timestamp</a></h3>
<p class="decl">~<a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a>();</p>
<div class="description">
<p>Destroys the timestamp </p>
</div>
<h2>Member Functions</h2>
<h3><a name="11190">elapsed</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.Timestamp.html#11151" title="Poco::Timestamp::TimeDiff">TimeDiff</a> elapsed() const;</p>
<div class="description">
<p>Returns the time elapsed since the time denoted by the timestamp. Equivalent to <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a>() - *this. </p>
</div>
<h3><a name="11189">epochMicroseconds</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.Timestamp.html#11149" title="Poco::Timestamp::TimeVal">TimeVal</a> epochMicroseconds() const;</p>
<div class="description">
<p>Returns the timestamp expressed in microseconds since the Unix epoch, midnight, January 1, 1970. </p>
</div>
<h3><a name="11187">epochTime</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">std::time_t epochTime() const;</p>
<div class="description">
<p>Returns the timestamp expressed in time_t. time_t base time is midnight, January 1, 1970. Resolution is one second. </p>
</div>
<h3><a name="11193">fromEpochTime</a> <img src="images/static.gif" alt="static" title="static" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">static <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> fromEpochTime(<br /> std::time_t t<br />);</p>
<div class="description">
<p>Creates a timestamp from a std::time_t. </p>
</div>
<h3><a name="11195">fromUtcTime</a> <img src="images/static.gif" alt="static" title="static" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">static <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> fromUtcTime(<br /> <a href="Poco.Timestamp.html#11150" title="Poco::Timestamp::UtcTimeVal">UtcTimeVal</a> val<br />);</p>
<div class="description">
<p>Creates a timestamp from a UTC time value. </p>
</div>
<h3><a name="11191">isElapsed</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">bool isElapsed(<br /> <a href="Poco.Timestamp.html#11151" title="Poco::Timestamp::TimeDiff">TimeDiff</a> interval<br />) const;</p>
<div class="description">
<p>Returns true if and only if the given interval has passed since the time denoted by the timestamp. </p>
</div>
<h3><a name="11167">operator !=</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">bool operator != (<br /> const <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & ts<br />) const;</p>
<div class="description">
<p></p>
</div>
<h3><a name="11177">operator +</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> operator + (<br /> <a href="Poco.Timestamp.html#11151" title="Poco::Timestamp::TimeDiff">TimeDiff</a> d<br />) const;</p>
<div class="description">
<p></p>
</div>
<h3><a name="11183">operator +=</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & operator += (<br /> <a href="Poco.Timestamp.html#11151" title="Poco::Timestamp::TimeDiff">TimeDiff</a> d<br />);</p>
<div class="description">
<p></p>
</div>
<h3><a name="11179">operator -</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> operator - (<br /> <a href="Poco.Timestamp.html#11151" title="Poco::Timestamp::TimeDiff">TimeDiff</a> d<br />) const;</p>
<div class="description">
<p></p>
</div>
<h3><a name="11181">operator -</a></h3>
<p class="decl"><a href="Poco.Timestamp.html#11151" title="Poco::Timestamp::TimeDiff">TimeDiff</a> operator - (<br /> const <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & ts<br />) const;</p>
<div class="description">
<p></p>
</div>
<h3><a name="11185">operator -=</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & operator -= (<br /> <a href="Poco.Timestamp.html#11151" title="Poco::Timestamp::TimeDiff">TimeDiff</a> d<br />);</p>
<div class="description">
<p></p>
</div>
<h3><a name="11173">operator <</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">bool operator < (<br /> const <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & ts<br />) const;</p>
<div class="description">
<p></p>
</div>
<h3><a name="11175">operator <=</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">bool operator <= (<br /> const <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & ts<br />) const;</p>
<div class="description">
<p></p>
</div>
<h3><a name="11158">operator =</a></h3>
<p class="decl"><a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & operator = (<br /> const <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & other<br />);</p>
<div class="description">
<p></p>
</div>
<h3><a name="11160">operator =</a></h3>
<p class="decl"><a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & operator = (<br /> <a href="Poco.Timestamp.html#11149" title="Poco::Timestamp::TimeVal">TimeVal</a> tv<br />);</p>
<div class="description">
<p></p>
</div>
<h3><a name="11165">operator ==</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">bool operator == (<br /> const <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & ts<br />) const;</p>
<div class="description">
<p></p>
</div>
<h3><a name="11169">operator ></a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">bool operator > (<br /> const <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & ts<br />) const;</p>
<div class="description">
<p></p>
</div>
<h3><a name="11171">operator >=</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">bool operator >= (<br /> const <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & ts<br />) const;</p>
<div class="description">
<p></p>
</div>
<h3><a name="11197">resolution</a> <img src="images/static.gif" alt="static" title="static" style="vertical-align:baseline;" border="0" /> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">static <a href="Poco.Timestamp.html#11149" title="Poco::Timestamp::TimeVal">TimeVal</a> resolution();</p>
<div class="description">
<p>Returns the resolution in units per second. Since the timestamp has microsecond resolution, the returned value is always 1000000. </p>
</div>
<h3><a name="11162">swap</a></h3>
<p class="decl">void swap(<br /> <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> & timestamp<br />);</p>
<div class="description">
<p>Swaps the <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> with another one. </p>
</div>
<h3><a name="11164">update</a></h3>
<p class="decl">void update();</p>
<div class="description">
<p>Updates the <a href="Poco.Timestamp.html" title="class Poco::Timestamp">Timestamp</a> with the current time. </p>
</div>
<h3><a name="11188">utcTime</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.Timestamp.html#11150" title="Poco::Timestamp::UtcTimeVal">UtcTimeVal</a> utcTime() const;</p>
<div class="description">
<p>Returns the timestamp expressed in UTC-based time. UTC base time is midnight, October 15, 1582. Resolution is 100 nanoseconds. </p>
</div>
<p class="footer">POCO C++ Libraries 1.3.6-all<br />
Copyright © 2009, <a href="http://pocoproject.org/" target="_blank">Applied Informatics Software Engineering GmbH and Contributors</a></p>
</div>
</body>
</html>
|
