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<h1 class="title">Time</h1>
<table class="docinfo" frame="void" rules="none">
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<tbody valign="top">
<tr><th class="docinfo-name">Author:</th>
<td>Arvid Norberg, <a class="last reference external" href="mailto:arvid&#64;rasterbar.com">arvid&#64;rasterbar.com</a></td></tr>
<tr><th class="docinfo-name">Version:</th>
<td>1.0.0</td></tr>
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<div class="contents topic" id="table-of-contents">
<p class="topic-title first">Table of contents</p>
<ul class="simple">
<li><a class="reference internal" href="#time-duration" id="id17">time_duration</a></li>
<li><a class="reference internal" href="#ptime" id="id18">ptime</a></li>
</ul>
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<p>This section contains fundamental time types used internall by
libtorrent and exposed through various places in the API. The two
basic types are <tt class="docutils literal">ptime</tt> and <tt class="docutils literal">time_duration</tt>. The first represents
a point in time and the second the difference between two points
in time.</p>
<p>The internal representation of these types is implementation defined
and they can only be constructed via one of the construction functions
that take a well defined time unit (seconds, minutes, etc.). They can
only be turned into well defined time units by the accessor functions
(total_microseconds(), etc.).</p>
<div class="note">
<p class="first admonition-title">Note</p>
<p class="last">In a future version of libtorrent, these types will be replaced
by the standard timer types from <tt class="docutils literal"><span class="pre">std::chrono</span></tt>.</p>
</div>
<a name="time_duration"></a><div class="section" id="time-duration">
<h1>time_duration</h1>
<p>Declared in &quot;<a class="reference external" href="../include/libtorrent/ptime.hpp">libtorrent/ptime.hpp</a>&quot;</p>
<p>libtorrent <a class="reference external" href="reference-Time.html#time_duration">time_duration</a> type</p>
<pre class="literal-block">
struct time_duration
{
time_duration&amp; <strong>operator-=</strong> (time_duration const&amp; c);
time_duration <strong>operator+</strong> (time_duration const&amp; c);
time_duration&amp; <strong>operator+=</strong> (time_duration const&amp; c);
time_duration <strong>operator/</strong> (int rhs) const;
explicit <strong>time_duration</strong> (boost::int64_t d);
time_duration <strong>operator-</strong> (time_duration const&amp; c);
time_duration&amp; <strong>operator*=</strong> (int v);
};
</pre>
<a name="ptime"></a></div>
<div class="section" id="ptime">
<h1>ptime</h1>
<p>Declared in &quot;<a class="reference external" href="../include/libtorrent/ptime.hpp">libtorrent/ptime.hpp</a>&quot;</p>
<p>This type represents a point in time.</p>
<pre class="literal-block">
struct ptime
{
ptime&amp; <strong>operator-=</strong> (time_duration rhs);
ptime&amp; <strong>operator+=</strong> (time_duration rhs);
};
</pre>
<a name="is_negative()"></a><div class="section" id="is-negative">
<h2>is_negative()</h2>
<p>Declared in &quot;<a class="reference external" href="../include/libtorrent/ptime.hpp">libtorrent/ptime.hpp</a>&quot;</p>
<pre class="literal-block">
inline bool <strong>is_negative</strong> (time_duration dt);
</pre>
<a name="operator+()"></a>
<a name="operator-()"></a></div>
<div class="section" id="operator-operator">
<h2>operator+() operator-()</h2>
<p>Declared in &quot;<a class="reference external" href="../include/libtorrent/ptime.hpp">libtorrent/ptime.hpp</a>&quot;</p>
<pre class="literal-block">
inline ptime <strong>operator+</strong> (time_duration lhs, ptime rhs);
inline ptime <strong>operator+</strong> (ptime lhs, time_duration rhs);
inline time_duration <strong>operator-</strong> (ptime lhs, ptime rhs);
inline ptime <strong>operator-</strong> (ptime lhs, time_duration rhs);
</pre>
<a name="time_now()"></a></div>
<div class="section" id="time-now">
<h2>time_now()</h2>
<p>Declared in &quot;<a class="reference external" href="../include/libtorrent/time.hpp">libtorrent/time.hpp</a>&quot;</p>
<pre class="literal-block">
ptime const&amp; <strong>time_now</strong> ();
</pre>
<p>returns the current time, as represented by <a class="reference external" href="reference-Time.html#ptime">ptime</a>. The
resolution of this timer is about 100 ms.</p>
<a name="time_now_hires()"></a></div>
<div class="section" id="time-now-hires">
<h2>time_now_hires()</h2>
<p>Declared in &quot;<a class="reference external" href="../include/libtorrent/time.hpp">libtorrent/time.hpp</a>&quot;</p>
<pre class="literal-block">
ptime <strong>time_now_hires</strong> ();
</pre>
<p>returns the current time as represented by <a class="reference external" href="reference-Time.html#ptime">ptime</a>. This is
more expensive than <a class="reference external" href="reference-Time.html#time_now()">time_now()</a>, but provides as high resolution
as the operating system can provide.</p>
<a name="min_time()"></a>
<a name="max_time()"></a></div>
<div class="section" id="min-time-max-time">
<h2>min_time() max_time()</h2>
<p>Declared in &quot;<a class="reference external" href="../include/libtorrent/time.hpp">libtorrent/time.hpp</a>&quot;</p>
<pre class="literal-block">
ptime <strong>max_time</strong> ();
ptime <strong>min_time</strong> ();
</pre>
<p>the earliest and latest possible time points
representable by <a class="reference external" href="reference-Time.html#ptime">ptime</a>.</p>
<a name="microsec()"></a>
<a name="minutes()"></a>
<a name="hours()"></a>
<a name="milliseconds()"></a>
<a name="seconds()"></a></div>
<div class="section" id="microsec-minutes-hours-milliseconds-seconds">
<h2>microsec() minutes() hours() milliseconds() seconds()</h2>
<p>Declared in &quot;<a class="reference external" href="../include/libtorrent/time.hpp">libtorrent/time.hpp</a>&quot;</p>
<pre class="literal-block">
time_duration <strong>microsec</strong> (boost::int64_t s);
time_duration <strong>seconds</strong> (boost::int64_t s);
time_duration <strong>milliseconds</strong> (boost::int64_t s);
time_duration <strong>minutes</strong> (boost::int64_t s);
time_duration <strong>hours</strong> (boost::int64_t s);
</pre>
<p>returns a <a class="reference external" href="reference-Time.html#time_duration">time_duration</a> representing the specified number of seconds, milliseconds
microseconds, minutes and hours.</p>
<a name="total_seconds()"></a>
<a name="total_microseconds()"></a>
<a name="total_milliseconds()"></a></div>
<div class="section" id="total-seconds-total-microseconds-total-milliseconds">
<h2>total_seconds() total_microseconds() total_milliseconds()</h2>
<p>Declared in &quot;<a class="reference external" href="../include/libtorrent/time.hpp">libtorrent/time.hpp</a>&quot;</p>
<pre class="literal-block">
boost::int64_t <strong>total_seconds</strong> (time_duration td);
boost::int64_t <strong>total_milliseconds</strong> (time_duration td);
boost::int64_t <strong>total_microseconds</strong> (time_duration td);
</pre>
<p>returns the number of seconds, milliseconds and microseconds
a <a class="reference external" href="reference-Time.html#time_duration">time_duration</a> represents.</p>
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