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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta name="generator" content="HTML Tidy, see www.w3.org"><meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1"><link type="text/css" rel="stylesheet" href="style.css"><!-- Generated by The Open Group's rhtm tool v1.2.1 --><!-- Copyright (c) 2001-2003 The Open Group, All Rights Reserved --><title><sys/types.h></title></head><body bgcolor="white"><script type="text/javascript" language="JavaScript" src="../../jscript/dotcode.js"></script><basefont size="3"> <a name="<sys/types.h>"></a> <a name="tag_13_67"></a><!-- <sys/types.h> --> <!--header start--><center><font size="2">The Open Group Base Specifications Issue 6<br>IEEE Std 1003.1, 2003 Edition<br>Copyright © 2001-2003 The IEEE and The Open Group, All Rights reserved.</font></center><!--header end--><hr size="2" noshade><h4><a name="tag_13_67_01"></a>NAME</h4><blockquote>sys/types.h - data types</blockquote><h4><a name="tag_13_67_02"></a>SYNOPSIS</h4><blockquote class="synopsis"><p><tt>#include <sys/types.h></tt></p></blockquote><h4><a name="tag_13_67_03"></a>DESCRIPTION</h4><blockquote><p>The <i><sys/types.h></i> header shall include definitions for at least the following types:</p><dl compact><dt><b>blkcnt_t</b></dt><dd>Used for file block counts.</dd><dt><b>blksize_t</b></dt><dd>Used for block sizes.</dd><dt><b>clock_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 system times in clock ticks or CLOCKS_PER_SEC; see <a href="../time.h.html"><i><time.h></i></a> . <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>clockid_t</b></dt><dd><sup>[<a href="javascript:open_code('TMR')">TMR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used for clock ID type in the clock and timer functions. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>dev_t</b></dt><dd>Used for device IDs.</dd><dt><b>fsblkcnt_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 file system block counts. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>fsfilcnt_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 file system file counts. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>gid_t</b></dt><dd>Used for group IDs.</dd><dt><b>id_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 as a general identifier; can be used to contain at least a <b>pid_t</b>, <b>uid_t</b>, or <b>gid_t</b>. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>ino_t</b></dt><dd>Used for file serial numbers.</dd><dt><b>key_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 XSI interprocess communication. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>mode_t</b></dt><dd>Used for some file attributes.</dd><dt><b>nlink_t</b></dt><dd>Used for link counts.</dd><dt><b>off_t</b></dt><dd>Used for file sizes.</dd><dt><b>pid_t</b></dt><dd>Used for process IDs and process group IDs.</dd><dt><b>pthread_attr_t</b></dt><dd><sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used to identify a thread attribute object. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>pthread_barrier_t</b></dt><dd><sup>[<a href="javascript:open_code('BAR')">BAR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used to identify a barrier. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>pthread_barrierattr_t</b></dt><dd><sup>[<a href="javascript:open_code('BAR')">BAR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used to define a barrier attributes object. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>pthread_cond_t</b></dt><dd><sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used for condition variables. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>pthread_condattr_t</b></dt><dd><sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used to identify a condition attribute object. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>pthread_key_t</b></dt><dd><sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used for thread-specific data keys. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>pthread_mutex_t</b></dt><dd><sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used for mutexes. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>pthread_mutexattr_t</b></dt><dd><sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used to identify a mutex attribute object. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>pthread_once_t</b></dt><dd><sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used for dynamic package initialization. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>pthread_rwlock_t</b></dt><dd><sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used for read-write locks. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>pthread_rwlockattr_t</b></dt><dd><sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used for read-write lock attributes. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>pthread_spinlock_t</b></dt><dd><sup>[<a href="javascript:open_code('SPI')">SPI</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used to identify a spin lock. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>pthread_t</b></dt><dd><sup>[<a href="javascript:open_code('THR')">THR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used to identify a thread. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>size_t</b></dt><dd>Used for sizes of objects.</dd><dt><b>ssize_t</b></dt><dd>Used for a count of bytes or an error indication.</dd><dt><b>suseconds_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><dt><b>time_t</b></dt><dd>Used for time in seconds.</dd><dt><b>timer_t</b></dt><dd><sup>[<a href="javascript:open_code('TMR')">TMR</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]" border="0"> Used for timer ID returned by <a href="../../functions/timer_create.html"><i>timer_create</i>()</a>. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>trace_attr_t</b></dt><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 attributes object. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>trace_event_id_t</b></dt><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 event type. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>trace_event_set_t</b></dt><dd><sup>[<a href="javascript:open_code('TRC TEF')">TRC TEF</a>]</sup> <img src="../../images/opt-start.gif" alt="[Option Start]"border="0"> Used to identify a trace event type set. <img src="../../images/opt-end.gif" alt="[Option End]" border="0"></dd><dt><b>trace_id_t</b></dt>⌨️ 快捷键说明
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