types.h.html

IEEE 1003.1-2003, Single Unix Specification v3

<dd><sup>[<a href="javascript:open_code('TRC')">TRC</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"> Used to identify a trace stream. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd>

<dt><b>uid_t</b></dt>

<dd>Used for user IDs.</dd>

<dt><b>useconds_t</b></dt>

<dd><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"> Used for time in microseconds. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd>
</dl>

<p>All of the types shall be defined as arithmetic types of an appropriate length, with the following exceptions:</p>

<p><br>
<sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"><br>
<b>key_t</b><br>
<img src="../../images/opt-end.gif" alt="[Option End]" border="0"><br>
<sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"><br>
<b>pthread_attr_t</b><br>
<img src="../../images/opt-end.gif" alt="[Option End]" border="0"><br>
<sup>[<a href="javascript:open_code('BAR')">BAR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"><br>
<b>pthread_barrier_t</b><br>
<b>pthread_barrierattr_t</b><br>
<img src="../../images/opt-end.gif" alt="[Option End]" border="0"><br>
<sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"><br>
<b>pthread_cond_t</b><br>
<b>pthread_condattr_t</b><br>
<b>pthread_key_t</b><br>
<b>pthread_mutex_t</b><br>
<b>pthread_mutexattr_t</b><br>
<b>pthread_once_t</b><br>
<b>pthread_rwlock_t</b><br>
<b>pthread_rwlockattr_t</b><br>
<img src="../../images/opt-end.gif" alt="[Option End]" border="0"><br>
<sup>[<a href="javascript:open_code('SPI')">SPI</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"><br>
<b>pthread_spinlock_t</b><br>
<img src="../../images/opt-end.gif" alt="[Option End]" border="0"><br>
<sup>[<a href="javascript:open_code('TRC')">TRC</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"><br>
<b>trace_attr_t</b><br>
<b>trace_event_id_t</b><br>
<img src="../../images/opt-end.gif" alt="[Option End]" border="0"><br>
<sup>[<a href="javascript:open_code('TRC TEF')">TRC TEF</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]"
border="0"><br>
<b>trace_event_set_t</b><br>
<img src="../../images/opt-end.gif" alt="[Option End]" border="0"><br>
<sup>[<a href="javascript:open_code('TRC')">TRC</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"><br>
<b>trace_id_t</b><br>
<img src="../../images/opt-end.gif" alt="[Option End]" border="0"><br>
</p>

<p>Additionally:</p>

<ul>
<li>
<p><b>mode_t</b> shall be an integer type.</p>
</li>

<li>
<p><b>nlink_t</b>, <b>uid_t</b>, <b>gid_t</b>, and <b>id_t</b> shall be integer types.</p>
</li>

<li>
<p><b>blkcnt_t</b> and <b>off_t</b> shall be signed integer types.</p>
</li>

<li>
<p><sup>[<a href="javascript:open_code('XSI')">XSI</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"> <b>fsblkcnt_t</b>, <b>fsfilcnt_t</b>, <img src="../../images/opt-end.gif" alt="[Option End]" border="0"> &nbsp;and
<b>ino_t</b> shall be defined as unsigned integer types.</p>
</li>

<li>
<p><b>size_t</b> shall be an unsigned integer type.</p>
</li>

<li>
<p><b>blksize_t</b>, <b>pid_t</b>, and <b>ssize_t</b> shall be signed integer types.</p>
</li>

<li>
<p><b>time_t</b> and <b>clock_t</b> shall be integer or real-floating types.</p>
</li>
</ul>

<p>The type <b>ssize_t</b> shall be capable of storing values at least in the range [-1,&nbsp;{SSIZE_MAX}]. <sup>[<a href=
"javascript:open_code('XSI')">XSI</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> &nbsp;The type
<b>useconds_t</b> shall be an unsigned integer type capable of storing values at least in the range [0,&nbsp;1000000]. The type
<b>suseconds_t</b> shall be a signed integer type capable of storing values at least in the range [-1,&nbsp;1000000]. <img src=
"../../images/opt-end.gif" alt="[Option End]" border="0"></p>

<p>The implementation shall support one or more programming environments in which the widths of <b>blksize_t</b>, <b>pid_t</b>,
<b>size_t</b>, <b>ssize_t</b>, <b>suseconds_t</b>, and <b>useconds_t</b> are no greater than the width of type <b>long</b>. The
names of these programming environments can be obtained using the <a href="../../functions/confstr.html"><i>confstr</i>()</a>
function or the <a href="../../utilities/getconf.html"><i>getconf</i></a> utility.</p>

<p>There are no defined comparison or assignment operators for the following types:</p>

<p><br>
<sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"><br>
<b>pthread_attr_t</b><br>
<img src="../../images/opt-end.gif" alt="[Option End]" border="0"><br>
<sup>[<a href="javascript:open_code('BAR')">BAR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"><br>
<b>pthread_barrier_t</b><br>
<b>pthread_barrierattr_t</b><br>
<img src="../../images/opt-end.gif" alt="[Option End]" border="0"><br>
<sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"><br>
<b>pthread_cond_t</b><br>
<b>pthread_condattr_t</b><br>
<b>pthread_mutex_t</b><br>
<b>pthread_mutexattr_t</b><br>
<b>pthread_rwlock_t</b><br>
<b>pthread_rwlockattr_t</b><br>
<img src="../../images/opt-end.gif" alt="[Option End]" border="0"><br>
<sup>[<a href="javascript:open_code('SPI')">SPI</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"><br>
<b>pthread_spinlock_t</b><br>
<img src="../../images/opt-end.gif" alt="[Option End]" border="0"><br>
<sup>[<a href="javascript:open_code('TRC')">TRC</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border=
"0"><br>
<b>trace_attr_t</b><br>
<img src="../../images/opt-end.gif" alt="[Option End]" border="0"><br>
</p>
</blockquote>

<hr>
<div class="box"><em>The following sections are informative.</em></div>

<h4><a name="tag_13_67_04"></a>APPLICATION USAGE</h4>

<blockquote>
<p>None.</p>
</blockquote>

<h4><a name="tag_13_67_05"></a>RATIONALE</h4>

<blockquote>
<p>None.</p>
</blockquote>

<h4><a name="tag_13_67_06"></a>FUTURE DIRECTIONS</h4>

<blockquote>
<p>None.</p>
</blockquote>

<h4><a name="tag_13_67_07"></a>SEE ALSO</h4>

<blockquote>
<p><a href="time.h.html"><i>&lt;time.h&gt;</i></a> , the System Interfaces volume of IEEE&nbsp;Std&nbsp;1003.1-2001, <a href=
"../../functions/confstr.html"><i>confstr</i>()</a>, the Shell and Utilities volume of IEEE&nbsp;Std&nbsp;1003.1-2001, <a href=
"../../utilities/getconf.html"><i>getconf</i></a></p>
</blockquote>

<h4><a name="tag_13_67_08"></a>CHANGE HISTORY</h4>

<blockquote>
<p>First released in Issue 1. Derived from Issue 1 of the SVID.</p>
</blockquote>

<h4><a name="tag_13_67_09"></a>Issue 5</h4>

<blockquote>
<p>The <b>clockid_t</b> and <b>timer_t</b> types are defined for alignment with the POSIX Realtime Extension.</p>

<p>The types <b>blkcnt_t</b>, <b>blksize_t</b>, <b>fsblkcnt_t</b>, <b>fsfilcnt_t</b>, and <b>suseconds_t</b> are added.</p>

<p>Large File System extensions are added.</p>

<p>Updated for alignment with the POSIX Threads Extension.</p>
</blockquote>

<h4><a name="tag_13_67_10"></a>Issue 6</h4>

<blockquote>
<p>The <b>pthread_barrier_t</b>, <b>pthread_barrierattr_t</b>, and <b>pthread_spinlock_t</b> types are added for alignment with
IEEE&nbsp;Std&nbsp;1003.1j-2000.</p>

<p>The margin code is changed from XSI to THR for the <b>pthread_rwlock_t</b> and <b>pthread_rwlockattr_t</b> types as Read-Write
Locks have been absorbed into the POSIX Threads option. The threads types are marked THR.</p>
</blockquote>

<div class="box"><em>End of informative text.</em></div>

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