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NAME="POSIX-THREAD-SPECIFIC-DATA">Thread-Specific Data &#0091;POSIX Section 17&#0093;</H1
><DIV
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><A
NAME="AEN13287">Functions Implemented</H2
><TABLE
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><PRE
CLASS="SCREEN"
>int pthread&#0095;key&#0095;create(pthread&#0095;key&#0095;t &#0042;key,
                       void (&#0042;destructor)(void &#0042;));
int pthread&#0095;setspecific(pthread&#0095;key&#0095;t key, const void &#0042;pointer);
void &#0042;pthread&#0095;getspecific(pthread&#0095;key&#0095;t key);
int pthread&#0095;key&#0095;delete(pthread&#0095;key&#0095;t key);</PRE
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CLASS="SECT2"
><H2
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><A
NAME="AEN13290">Functions Omitted</H2
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>&lt;none&gt;</P
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><DIV
CLASS="SECT2"
><H2
CLASS="SECT2"
><A
NAME="AEN13293">Notes</H2
><P
></P
><UL
><LI
><P
>    The value of PTHREAD&#0095;DESTRUCTOR&#0095;ITERATIONS is
    provided by the
    CYGNUM&#0095;POSIX&#0095;PTHREAD&#0095;DESTRUCTOR&#0095;ITERATIONS
    option. This controls the number of times that a key destructor
    will be called while the data item remains non-NULL.
    </P
></LI
><LI
><P
>    The value of PTHREAD&#0095;KEYS&#0095;MAX is provided
    by the CYGNUM&#0095;POSIX&#0095;PTHREAD&#0095;KEYS&#0095;MAX
    option. This defines the maximum number of per-thread data items
    supported. The POSIX standard calls for this to be a minimum of
    128, which is rather large for an embedded system. The default
    value for this option is set to 128 for compatibility but it
    should be reduced to a more usable value.
    </P
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1	28	unneback	`<!-- Copyright (C) 2003 Red Hat, Inc. -->`
2			`<!-- This material may be distributed only subject to the terms -->`
3			`<!-- and conditions set forth in the Open Publication License, v1.0 -->`
4			`<!-- or later (the latest version is presently available at -->`
5			`<!-- http://www.opencontent.org/openpub/). -->`
6			`<!-- Distribution of the work or derivative of the work in any -->`
7			`<!-- standard (paper) book form is prohibited unless prior -->`
8			`<!-- permission is obtained from the copyright holder. -->`
9			`<HTML`
10			`><HEAD`
11			`><TITLE`
12			`>Thread-Specific Data [POSIX Section 17]</TITLE`
13			`><meta name="MSSmartTagsPreventParsing" content="TRUE">`
14			`<META`
15			`NAME="GENERATOR"`
16			`CONTENT="Modular DocBook HTML Stylesheet Version 1.76b+`
17			`"><LINK`
18			`REL="HOME"`
19			`TITLE="eCos Reference Manual"`
20			`HREF="ecos-ref.html"><LINK`
21			`REL="UP"`
22			`TITLE="POSIX Standard Support"`
23			`HREF="posix-standard-support.html"><LINK`
24			`REL="PREVIOUS"`
25			`TITLE="Thread Management [POSIX Section 16]"`
26			`HREF="posix-thread-management.html"><LINK`
27			`REL="NEXT"`
28			`TITLE="Thread Cancellation [POSIX Section 18]"`
29			`HREF="posix-thread-cancellation.html"></HEAD`
30			`><BODY`
31			`CLASS="SECT1"`
32			`BGCOLOR="#FFFFFF"`
33			`TEXT="#000000"`
34			`LINK="#0000FF"`
35			`VLINK="#840084"`
36			`ALINK="#0000FF"`
37			`><DIV`
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41			`WIDTH="100%"`
42			`BORDER="0"`
43			`CELLPADDING="0"`
44			`CELLSPACING="0"`
45			`><TR`
46			`><TH`
47			`COLSPAN="3"`
48			`ALIGN="center"`
49			`>eCos Reference Manual</TH`
50			`></TR`
51			`><TR`
52			`><TD`
53			`WIDTH="10%"`
54			`ALIGN="left"`
55			`VALIGN="bottom"`
56			`><A`
57			`HREF="posix-thread-management.html"`
58			`ACCESSKEY="P"`
59			`>Prev</A`
60			`></TD`
61			`><TD`
62			`WIDTH="80%"`
63			`ALIGN="center"`
64			`VALIGN="bottom"`
65			`>Chapter 31. POSIX Standard Support</TD`
66			`><TD`
67			`WIDTH="10%"`
68			`ALIGN="right"`
69			`VALIGN="bottom"`
70			`><A`
71			`HREF="posix-thread-cancellation.html"`
72			`ACCESSKEY="N"`
73			`>Next</A`
74			`></TD`
75			`></TR`
76			`></TABLE`
77			`><HR`
78			`ALIGN="LEFT"`
79			`WIDTH="100%"></DIV`
80			`><DIV`
81			`CLASS="SECT1"`
82			`><H1`
83			`CLASS="SECT1"`
84			`><A`
85			`NAME="POSIX-THREAD-SPECIFIC-DATA">Thread-Specific Data [POSIX Section 17]</H1`
86			`><DIV`
87			`CLASS="SECT2"`
88			`><H2`
89			`CLASS="SECT2"`
90			`><A`
91			`NAME="AEN13287">Functions Implemented</H2`
92			`><TABLE`
93			`BORDER="5"`
94			`BGCOLOR="#E0E0F0"`
95			`WIDTH="70%"`
96			`><TR`
97			`><TD`
98			`><PRE`
99			`CLASS="SCREEN"`
100			`>int pthread_key_create(pthread_key_t *key,`
101			`void (destructor)(void ));`
102			`int pthread_setspecific(pthread_key_t key, const void *pointer);`
103			`void *pthread_getspecific(pthread_key_t key);`
104			`int pthread_key_delete(pthread_key_t key);</PRE`
105			`></TD`
106			`></TR`
107			`></TABLE`
108			`></DIV`
109			`><DIV`
110			`CLASS="SECT2"`
111			`><H2`
112			`CLASS="SECT2"`
113			`><A`
114			`NAME="AEN13290">Functions Omitted</H2`
115			`><P`
116			`><none></P`
117			`></DIV`
118			`><DIV`
119			`CLASS="SECT2"`
120			`><H2`
121			`CLASS="SECT2"`
122			`><A`
123			`NAME="AEN13293">Notes</H2`
124			`><P`
125			`></P`
126			`><UL`
127			`><LI`
128			`><P`
129			`> The value of PTHREAD_DESTRUCTOR_ITERATIONS is`
130			`provided by the`
131			`CYGNUM_POSIX_PTHREAD_DESTRUCTOR_ITERATIONS`
132			`option. This controls the number of times that a key destructor`
133			`will be called while the data item remains non-NULL.`
134			`</P`
135			`></LI`
136			`><LI`
137			`><P`
138			`> The value of PTHREAD_KEYS_MAX is provided`
139			`by the CYGNUM_POSIX_PTHREAD_KEYS_MAX`
140			`option. This defines the maximum number of per-thread data items`
141			`supported. The POSIX standard calls for this to be a minimum of`
142			`128, which is rather large for an embedded system. The default`
143			`value for this option is set to 128 for compatibility but it`
144			`should be reduced to a more usable value.`
145			`</P`
146			`></LI`
147			`></UL`
148			`></DIV`
149			`></DIV`
150			`><DIV`
151			`CLASS="NAVFOOTER"`
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162			`WIDTH="33%"`
163			`ALIGN="left"`
164			`VALIGN="top"`
165			`><A`
166			`HREF="posix-thread-management.html"`
167			`ACCESSKEY="P"`
168			`>Prev</A`
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177			`>Home</A`
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186			`>Next</A`
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188			`></TR`
189			`><TR`
190			`><TD`
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194			`>Thread Management [POSIX Section 16]</TD`
195			`><TD`
196			`WIDTH="34%"`
197			`ALIGN="center"`
198			`VALIGN="top"`
199			`><A`
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201			`ACCESSKEY="U"`
202			`>Up</A`
203			`></TD`
204			`><TD`
205			`WIDTH="33%"`
206			`ALIGN="right"`
207			`VALIGN="top"`
208			`>Thread Cancellation [POSIX Section 18]</TD`
209			`></TR`
210			`></TABLE`
211			`></DIV`
212			`></BODY`
213			`></HTML`
214			`>`

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