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-<!-- Copyright (C) 2003 Red Hat, Inc.                                -->
-<!-- This material may be distributed only subject to the terms      -->
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-<HTML
-><HEAD
-><TITLE
->Execution Scheduling [POSIX Section 13]</TITLE
-><meta name="MSSmartTagsPreventParsing" content="TRUE">
-<META
-NAME="GENERATOR"
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-"><LINK
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-TITLE="Memory Management [POSIX Section 12]"
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->eCos Reference Manual</TH
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-HREF="posix-memory-management.html"
-ACCESSKEY="P"
->Prev</A
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->Chapter 31. POSIX Standard Support</TD
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-><DIV
-CLASS="SECT1"
-><H1
-CLASS="SECT1"
-><A
-NAME="POSIX-EXECUTION-SCHEDULING">Execution Scheduling &#0091;POSIX Section 13&#0093;</H1
-><DIV
-CLASS="SECT2"
-><H2
-CLASS="SECT2"
-><A
-NAME="AEN13195">Functions Implemented</H2
-><TABLE
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-WIDTH="70%"
-><TR
-><TD
-><PRE
-CLASS="SCREEN"
->int sched&#0095;yield(void); 
-int sched&#0095;get&#0095;priority&#0095;max(int policy); 
-int sched&#0095;get&#0095;priority&#0095;min(int policy); 
-int sched&#0095;rr&#0095;get&#0095;interval(pid&#0095;t pid, struct timespec &#0042;t); 
-int pthread&#0095;attr&#0095;setscope(pthread&#0095;attr&#0095;t &#0042;attr, int scope); 
-int pthread&#0095;attr&#0095;getscope(const pthread&#0095;attr&#0095;t &#0042;attr, int &#0042;scope); 
-int pthread&#0095;attr&#0095;setinheritsched(pthread&#0095;attr&#0095;t &#0042;attr, int inherit); 
-int pthread&#0095;attr&#0095;getinheritsched(const pthread&#0095;attr&#0095;t &#0042;attr, int &#0042;inherit); 
-int pthread&#0095;attr&#0095;setschedpolicy(pthread&#0095;attr&#0095;t &#0042;attr, int policy); 
-int pthread&#0095;attr&#0095;getschedpolicy(const pthread&#0095;attr&#0095;t &#0042;attr, int &#0042;policy);
-int pthread&#0095;attr&#0095;setschedparam( pthread&#0095;attr&#0095;t &#0042;attr, const struct sched&#0095;param &#0042;param); 
-int pthread&#0095;attr&#0095;getschedparam( const pthread&#0095;attr&#0095;t &#0042;attr,
-                               struct sched&#0095;param &#0042;param); 
-int pthread&#0095;setschedparam(pthread&#0095;t thread, int policy,
-                         const struct sched&#0095;param &#0042;param); 
-int pthread&#0095;getschedparam(pthread&#0095;t thread, int &#0042;policy,
-                         struct sched&#0095;param &#0042;param); 
-int pthread&#0095;mutexattr&#0095;setprotocol( pthread&#0095;mutexattr&#0095;t &#0042;attr,
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-int pthread&#0095;mutexattr&#0095;getprotocol( pthread&#0095;mutexattr&#0095;t &#0042;attr,
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-int pthread&#0095;mutexattr&#0095;setprioceiling( pthread&#0095;mutexattr&#0095;t &#0042;attr,
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-int pthread&#0095;mutexattr&#0095;getprioceiling( pthread&#0095;mutexattr&#0095;t &#0042;attr,
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-                                 int prioceiling,
-                                 int &#0042;old&#0095;ceiling); 
-int pthread&#0095;mutex&#0095;getprioceiling( pthread&#0095;mutex&#0095;t &#0042;mutex,
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-><H2
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-><A
-NAME="AEN13198">Functions Omitted</H2
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-><TR
-><TD
-><PRE
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->int sched&#0095;setparam(pid&#0095;t pid, const struct sched&#0095;param &#0042;param); 
-int sched&#0095;getparam(pid&#0095;t pid, struct sched&#0095;param &#0042;param); 
-int sched&#0095;setscheduler(pid&#0095;t pid, int policy,
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-int sched&#0095;getscheduler(pid&#0095;t pid);</PRE
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-><H2
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->        The functions <SPAN
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-><I
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->sched&#0095;setparam()</I
-></SPAN
->, 
-         <SPAN
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->sched&#0095;getparam()</I
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->,
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->sched&#0095;setscheduler()</I
-></SPAN
-> and
-         <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->sched&#0095;getscheduler()</I
-></SPAN
-> are present
-         but always return an error.
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-><LI
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->        The scheduler policy <SPAN
-CLASS="emphasis"
-><I
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-></SPAN
-> is
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->.
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->        Only <SPAN
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-><I
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->PTHREAD&#0095;SCOPE&#0095;SYSTEM</I
-></SPAN
->
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->contentionscope</B
-></SPAN
->
-         attribute.
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-></LI
-><LI
-><P
->        The default thread scheduling attributes are:
-         <TABLE
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-><TR
-><TD
-><PRE
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->        contentionscope          PTHREAD&#0095;SCOPE&#0095;SYSTEM
-         inheritsched             PTHREAD&#0095;INHERIT&#0095;SCHED
-         schedpolicy              SCHED&#0095;OTHER
-         schedparam.sched         0
-         </PRE
-></TD
-></TR
-></TABLE
->
-          </P
-></LI
-><LI
-><P
->        Mutex priority inversion protection is controlled by a
-         number of kernel configuration options.
-         If CYGSEM&#0095;KERNEL&#0095;SYNCH&#0095;MUTEX&#0095;PRIORITY&#0095;INVERSION&#0095;PROTOCOL&#0095;INHERIT
-         is defined then
-         &#0123;&#0095;POSIX&#0095;THREAD&#0095;PRIO&#0095;INHERIT&#0125;
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-         be set as the protocol in a
-         <SPAN
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-><I
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->pthread&#0095;mutexattr&#0095;t</I
-></SPAN
->
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-><I
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->pthread&#0095;mutexattr&#0095;t</I
-></SPAN
-> object.
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-><LI
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->        The default attribute values set by
-         <SPAN
-CLASS="emphasis"
-><I
-CLASS="EMPHASIS"
->pthread&#0095;mutexattr&#0095;init()</I
-></SPAN
->
-         is to set the protocol attribute to
-         PTHREAD&#0095;PRIO&#0095;NONE and the prioceiling
-         attribute to zero.
-         </P
-></LI
-></UL
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