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+>Thread-Specific Data [POSIX Section 17]</TITLE
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+TITLE="Thread Management [POSIX Section 16]"
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+TITLE="Thread Cancellation [POSIX Section 18]"
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+>Chapter 31. POSIX Standard Support</TD
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+NAME="POSIX-THREAD-SPECIFIC-DATA">Thread-Specific Data [POSIX Section 17]</H1
+><DIV
+CLASS="SECT2"
+><H2
+CLASS="SECT2"
+><A
+NAME="AEN13287">Functions Implemented</H2
+><TABLE
+BORDER="5"
+BGCOLOR="#E0E0F0"
+WIDTH="70%"
+><TR
+><TD
+><PRE
+CLASS="SCREEN"
+>int pthread_key_create(pthread_key_t *key,
+ void (*destructor)(void *));
+int pthread_setspecific(pthread_key_t key, const void *pointer);
+void *pthread_getspecific(pthread_key_t key);
+int pthread_key_delete(pthread_key_t key);</PRE
+></TD
+></TR
+></TABLE
+></DIV
+><DIV
+CLASS="SECT2"
+><H2
+CLASS="SECT2"
+><A
+NAME="AEN13290">Functions Omitted</H2
+><P
+><none></P
+></DIV
+><DIV
+CLASS="SECT2"
+><H2
+CLASS="SECT2"
+><A
+NAME="AEN13293">Notes</H2
+><P
+></P
+><UL
+><LI
+><P
+> The value of PTHREAD_DESTRUCTOR_ITERATIONS is
+ provided by the
+ CYGNUM_POSIX_PTHREAD_DESTRUCTOR_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_KEYS_MAX is provided
+ by the CYGNUM_POSIX_PTHREAD_KEYS_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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