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<a href="#pub-methods">Public Member Functions</a> |
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<div class="title">qpid::sys::AbsTime Class Reference</div> </div>
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<!-- doxytag: class="qpid::sys::AbsTime" -->
<p>Class to represent an instant in time.
<a href="a00001.html#details">More...</a></p>
<p><code>#include <<a class="el" href="a00563_source.html">qpid/sys/Time.h</a>></code></p>
<p><a href="a00893.html">List of all members.</a></p>
<table class="memberdecls">
<tr><td colspan="2"><h2><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00001.html#acf3a166cb6df2d823a415d3c6ef2e137">AbsTime</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00001.html#a1e3f8ed571d1a9fd86a99788675af9c2">AbsTime</a> (const <a class="el" href="a00001.html">AbsTime</a> &time0, const <a class="el" href="a00103.html">Duration</a> &duration)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="a00001.html#a6ef078995d9a68036402a71e59607466">operator==</a> (const <a class="el" href="a00001.html">AbsTime</a> &t) const </td></tr>
<tr><td colspan="2"><h2><a name="pub-static-methods"></a>
Static Public Member Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static <a class="el" href="a00001.html">AbsTime</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00001.html#a0ed4b5707126f2efe347ee9627d0ada7">now</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static <a class="el" href="a00001.html">AbsTime</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00001.html#af7016ce54c65f48a69eeb89e724cb9d4">FarFuture</a> ()</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">static <a class="el" href="a00001.html">AbsTime</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00001.html#a555e78f7c6826c7a4afabc5c9355b7de">Epoch</a> ()</td></tr>
<tr><td colspan="2"><h2><a name="friends"></a>
Friends</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="a00001.html#ab362ae8135e030b4c798ae7c022a4bdd">operator<</a> (const <a class="el" href="a00001.html">AbsTime</a> &a, const <a class="el" href="a00001.html">AbsTime</a> &b)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="a00001.html#ac51bbeb0df704f6ce1764e517bf0fbc6">operator></a> (const <a class="el" href="a00001.html">AbsTime</a> &a, const <a class="el" href="a00001.html">AbsTime</a> &b)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00243.html">std::ostream</a> & </td><td class="memItemRight" valign="bottom"><a class="el" href="a00001.html#a1ed078452bd3db4988f97830c7f60edd">operator<<</a> (<a class="el" href="a00243.html">std::ostream</a> &, const <a class="el" href="a00001.html">AbsTime</a> &)</td></tr>
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<hr/><a name="details" id="details"></a><h2>Detailed Description</h2>
<div class="textblock"><p>Class to represent an instant in time. </p>
<p>The time resolution is in nanosecs, and this is held with 64 bits giving a total time span from about 25 million years ago to 25 million years hence. As an aside the internal time can sensibly be negative meaning before the epoch (probably 1/1/1970 although this class doesn't care).</p>
<p>The <a class="el" href="a00001.html" title="Class to represent an instant in time.">AbsTime</a> class is a value class and so you don't need to add any accessors to its internal state. If you think you want to replace its value, you need to construct a new <a class="el" href="a00001.html" title="Class to represent an instant in time.">AbsTime</a> and assign it, viz:</p>
<p><a class="el" href="a00001.html" title="Class to represent an instant in time.">AbsTime</a> when = <a class="el" href="a00001.html#a0ed4b5707126f2efe347ee9627d0ada7">now()</a>; ... when = AbsTime(when, 2*TIME_SEC); // Advance timer 2 secs</p>
<p><a class="el" href="a00001.html" title="Class to represent an instant in time.">AbsTime</a> is not intended to be used to represent calendar dates/times but you can construct a <a class="el" href="a00103.html" title="Class to represent the duration between instants of time.">Duration</a> since the Unix Epoch, 1970-1-1-00:00, so that you can convert to a date/time if needed:</p>
<p>int64_t nanosec_since_epoch = <a class="el" href="a00103.html" title="Class to represent the duration between instants of time.">Duration</a>(EPOCH, <a class="el" href="a00001.html#a0ed4b5707126f2efe347ee9627d0ada7">now()</a>);</p>
<p>There are some sensible operations that are currently missing from <a class="el" href="a00001.html" title="Class to represent an instant in time.">AbsTime</a>, but nearly all that's needed can be done with a mixture of AbsTimes and Durations.</p>
<p>For example, convenience operators to add a <a class="el" href="a00103.html" title="Class to represent the duration between instants of time.">Duration</a> and <a class="el" href="a00001.html" title="Class to represent an instant in time.">AbsTime</a> returning an <a class="el" href="a00001.html" title="Class to represent an instant in time.">AbsTime</a> would fit here (although you can already perform the operation with one of the <a class="el" href="a00001.html" title="Class to represent an instant in time.">AbsTime</a> constructors). However trying to add 2 AbsTimes doesn't make sense. </p>
<p>Definition at line <a class="el" href="a00563_source.html#l00044">44</a> of file <a class="el" href="a00563_source.html">Time.h</a>.</p>
</div><hr/><h2>Constructor & Destructor Documentation</h2>
<a class="anchor" id="acf3a166cb6df2d823a415d3c6ef2e137"></a><!-- doxytag: member="qpid::sys::AbsTime::AbsTime" ref="acf3a166cb6df2d823a415d3c6ef2e137" args="()" -->
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<td class="memname">qpid::sys::AbsTime::AbsTime </td>
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<td><code> [inline]</code></td>
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<p>Definition at line <a class="el" href="a00563_source.html#l00088">88</a> of file <a class="el" href="a00563_source.html">Time.h</a>.</p>
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<a class="anchor" id="a1e3f8ed571d1a9fd86a99788675af9c2"></a><!-- doxytag: member="qpid::sys::AbsTime::AbsTime" ref="a1e3f8ed571d1a9fd86a99788675af9c2" args="(const AbsTime &time0, const Duration &duration)" -->
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<td class="paramname"><em>time0</em>, </td>
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<hr/><h2>Member Function Documentation</h2>
<a class="anchor" id="a555e78f7c6826c7a4afabc5c9355b7de"></a><!-- doxytag: member="qpid::sys::AbsTime::Epoch" ref="a555e78f7c6826c7a4afabc5c9355b7de" args="()" -->
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<td class="memname">static <a class="el" href="a00001.html">AbsTime</a> qpid::sys::AbsTime::Epoch </td>
<td>(</td>
<td class="paramname"></td><td>)</td>
<td><code> [static]</code></td>
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<a class="anchor" id="af7016ce54c65f48a69eeb89e724cb9d4"></a><!-- doxytag: member="qpid::sys::AbsTime::FarFuture" ref="af7016ce54c65f48a69eeb89e724cb9d4" args="()" -->
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<td class="paramname"></td><td>)</td>
<td><code> [static]</code></td>
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<a class="anchor" id="a0ed4b5707126f2efe347ee9627d0ada7"></a><!-- doxytag: member="qpid::sys::AbsTime::now" ref="a0ed4b5707126f2efe347ee9627d0ada7" args="()" -->
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<td><code> [static]</code></td>
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<p>Referenced by <a class="el" href="a00563_source.html#l00129">qpid::sys::now()</a>.</p>
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<a class="anchor" id="a6ef078995d9a68036402a71e59607466"></a><!-- doxytag: member="qpid::sys::AbsTime::operator==" ref="a6ef078995d9a68036402a71e59607466" args="(const AbsTime &t) const " -->
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<td class="paramname"><em>t</em></td><td>)</td>
<td> const<code> [inline]</code></td>
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<p>Definition at line <a class="el" href="a00563_source.html#l00097">97</a> of file <a class="el" href="a00563_source.html">Time.h</a>.</p>
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<hr/><h2>Friends And Related Function Documentation</h2>
<a class="anchor" id="ab362ae8135e030b4c798ae7c022a4bdd"></a><!-- doxytag: member="qpid::sys::AbsTime::operator<" ref="ab362ae8135e030b4c798ae7c022a4bdd" args="(const AbsTime &a, const AbsTime &b)" -->
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<td></td><td><code> [friend]</code></td>
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<p>Definition at line <a class="el" href="a00563_source.html#l00131">131</a> of file <a class="el" href="a00563_source.html">Time.h</a>.</p>
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<a class="anchor" id="a1ed078452bd3db4988f97830c7f60edd"></a><!-- doxytag: member="qpid::sys::AbsTime::operator<<" ref="a1ed078452bd3db4988f97830c7f60edd" args="(std::ostream &, const AbsTime &)" -->
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<a class="anchor" id="ac51bbeb0df704f6ce1764e517bf0fbc6"></a><!-- doxytag: member="qpid::sys::AbsTime::operator>" ref="ac51bbeb0df704f6ce1764e517bf0fbc6" args="(const AbsTime &a, const AbsTime &b)" -->
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<p>Definition at line <a class="el" href="a00563_source.html#l00133">133</a> of file <a class="el" href="a00563_source.html">Time.h</a>.</p>
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<hr/>The documentation for this class was generated from the following file:<ul>
<li>qpid/sys/<a class="el" href="a00563_source.html">Time.h</a></li>
</ul>
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