summaryrefslogtreecommitdiff
path: root/manual/pthread_condattr_init.html
blob: 8b8b2f2aa7ad208b3d3f0f24f44dd012dde66908 (plain)
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
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML>
<HEAD>
	<META HTTP-EQUIV="CONTENT-TYPE" CONTENT="text/html; charset=utf-8">
	<TITLE>PTHREAD_CONDATTR(3) manual page</TITLE>
	<META NAME="GENERATOR" CONTENT="OpenOffice.org 1.1.3  (Linux)">
	<META NAME="CREATED" CONTENT="20050504;16375600">
	<META NAME="CHANGED" CONTENT="20050504;16570300">
	<!-- manual page source format generated by PolyglotMan v3.2, -->
	<!-- available at http://polyglotman.sourceforge.net/ -->
</HEAD>
<BODY LANG="en-GB" BGCOLOR="#ffffff" DIR="LTR">
<H4>POSIX Threads for Windows – REFERENCE - <A HREF="http://sources.redhat.com/pthreads-win32">Pthreads-w32</A></H4>
<P><A HREF="index.html">Reference Index</A></P>
<P><A HREF="#toc">Table of Contents</A></P>
<H2><A HREF="#toc0" NAME="sect0">Name</A></H2>
<P>pthread_condattr_init, pthread_condattr_destroy - condition
creation 
</P>
<P>attributes 
</P>
<H2><A HREF="#toc1" NAME="sect1">Synopsis</A></H2>
<P><B>#include &lt;pthread.h&gt;</B> 
</P>
<P><B>int pthread_condattr_init(pthread_condattr_t *</B><I>attr</I><B>);</B>
</P>
<P><B>int pthread_condattr_destroy(pthread_condattr_t *</B><I>attr</I><B>);</B>
</P>
<H2><A HREF="#toc2" NAME="sect2">Description</A></H2>
<P>Condition attributes can be specified at condition creation time,
by passing a condition attribute object as second argument to
<A HREF="pthread_cond_init.html"><B>pthread_cond_init</B>(3)</A> .
Passing <B>NULL</B> is equivalent to passing a condition attribute
object with all attributes set to their default values. 
</P>
<P><B>pthread_condattr_init</B> initializes the condition attribute
object <I>attr</I> and fills it with default values for the
attributes. <B>pthread_condattr_destroy</B> destroys a condition
attribute object, which must not be reused until it is reinitialized.</P>
<P><B>Pthreads-w32</B> defines _<B>POSIX_THREAD_PROCESS_SHARED</B> in
pthread.h as -1 to indicate that the attribute routines are
implemented but that the process shared attribute is not supported.</P>
<H2><A HREF="#toc3" NAME="sect3">Return Value</A></H2>
<P>All condition variable functions return 0 on success and a
non-zero error code on error.</P>
<H2><A HREF="#toc4" NAME="sect4">Errors</A></H2>
<P>The <B>pthread_condattr_init</B> function returns the following
error code on error: 
</P>
<DL>
	<DL>
		<DT STYLE="margin-right: 1cm; margin-bottom: 0.5cm"><B>ENOMEM</B> 
		</DT><DD STYLE="margin-right: 1cm; margin-bottom: 0.5cm">
		The was insufficient memory to create the attribute.<SPAN STYLE="font-weight: medium">
		</SPAN>
		</DD></DL>
</DL>
<P>
The <B>pthread_condattr_destroy</B> function returns the following
error code on error: 
</P>
<DL>
	<DL>
		<DT STYLE="margin-right: 1cm; margin-bottom: 0.5cm"><B>EINVAL</B> 
		</DT><DD STYLE="margin-right: 1cm; margin-bottom: 0.5cm">
		The <I>attr</I> argument is not valid.<SPAN STYLE="font-weight: medium">
		</SPAN>
		</DD></DL>
</DL>
<H2>
<A HREF="#toc5" NAME="sect5">Author</A></H2>
<P>Xavier Leroy &lt;Xavier.Leroy@inria.fr&gt; 
</P>
<P>Modified by Ross Johnson for use with <A HREF="http://sources.redhat.com/pthreads-win32">Pthreads-w32</A>.</P>
<H2><A HREF="#toc6" NAME="sect6">See Also</A></H2>
<P><A HREF="pthread_cond_init.html"><B>pthread_cond_init</B>(3)</A> .
</P>
<HR>
<P><A NAME="toc"></A><B>Table of Contents</B></P>
<UL>
	<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect0" NAME="toc0">Name</A>
		</P>
	<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect1" NAME="toc1">Synopsis</A>
		</P>
	<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect2" NAME="toc2">Description</A>
		</P>
	<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect3" NAME="toc3">Return
	Value</A> 
	</P>
	<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect4" NAME="toc4">Errors</A>
		</P>
	<LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect5" NAME="toc5">Author</A>
		</P>
	<LI><P><A HREF="#sect6" NAME="toc6">See Also</A> 
	</P>
</UL>
</BODY>
</HTML>