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| <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_setschedparam, pthread_getschedparam - control thread | |
| scheduling | |
| </P> | |
| <P>parameters | |
| </P> | |
| <H2><A HREF="#toc1" NAME="sect1">Synopsis</A></H2> | |
| <P><B>#include <pthread.h></B> | |
| </P> | |
| <P><B>int pthread_setschedparam(pthread_t </B><I>target_thread</I><B>, | |
| int </B><I>policy</I><B>, const struct sched_param *</B><I>param</I><B>);</B> | |
| </P> | |
| <P><B>int pthread_getschedparam(pthread_t </B><I>target_thread</I><B>, | |
| int *</B><I>policy</I><B>, struct sched_param *</B><I>param</I><B>);</B> | |
| </P> | |
| <H2><A HREF="#toc2" NAME="sect2">Description</A></H2> | |
| <P><B>pthread_setschedparam</B> sets the scheduling parameters for | |
| the thread <I>target_thread</I> as indicated by <I>policy</I> and | |
| <I>param</I>. <I>policy</I> can be either <B>SCHED_OTHER</B> | |
| (regular, non-real-time scheduling), <B>SCHED_RR</B> (real-time, | |
| round-robin) or <B>SCHED_FIFO</B> (real-time, first-in first-out). | |
| <I>param</I> specifies the scheduling priority for the two real-time | |
| policies.</P> | |
| <P><B>Pthreads-w32</B> only supports SCHED_OTHER and does not support | |
| the real-time scheduling policies <B>SCHED_RR</B> and <B>SCHED_FIFO.</B> | |
| </P> | |
| <P><B>pthread_getschedparam</B> retrieves the scheduling policy and | |
| scheduling parameters for the thread <I>target_thread</I> and stores | |
| them in the locations pointed to by <I>policy</I> and <I>param</I>, | |
| respectively. | |
| </P> | |
| <H2><A HREF="#toc3" NAME="sect3">Return Value</A></H2> | |
| <P><B>pthread_setschedparam</B> and <B>pthread_getschedparam</B> | |
| return 0 on success and a non-zero error code on error. | |
| </P> | |
| <H2><A HREF="#toc4" NAME="sect4">Errors</A></H2> | |
| <P>On error, <B>pthread_setschedparam</B> returns the following error | |
| codes: | |
| </P> | |
| <DL> | |
| <DL> | |
| <DT STYLE="margin-right: 1cm; margin-bottom: 0.5cm"><B>ENOTSUP</B> | |
| </DT><DD STYLE="margin-right: 1cm; margin-bottom: 0.5cm"> | |
| <I>policy</I> is not <B>SCHED_OTHER.</B></DD><DT STYLE="margin-right: 1cm; margin-bottom: 0.5cm"> | |
| <B>EINVAL</B> | |
| </DT><DD STYLE="margin-right: 1cm; margin-bottom: 0.5cm"> | |
| One of the arguments is invalid, or the priority value specified by | |
| <I>param</I> is not valid for the specified policy.</DD><DT STYLE="margin-right: 1cm; margin-bottom: 0.5cm"> | |
| <B>ESRCH</B> | |
| </DT><DD STYLE="margin-right: 1cm; margin-bottom: 0.5cm"> | |
| The <I>target_thread</I> is invalid or has already terminated | |
| </DD></DL> | |
| </DL> | |
| <P> | |
| On error, <B>pthread_getschedparam</B> returns the following error | |
| codes: | |
| </P> | |
| <DL> | |
| <DL> | |
| <DT STYLE="margin-right: 1cm; margin-bottom: 0.5cm"><B>ESRCH</B> | |
| </DT><DD STYLE="margin-right: 1cm; margin-bottom: 0.5cm"> | |
| the <I>target_thread</I> is invalid or has already terminated | |
| </DD></DL> | |
| </DL> | |
| <H2> | |
| <A HREF="#toc5" NAME="sect5">Author</A></H2> | |
| <P>Xavier Leroy <Xavier.Leroy@inria.fr> | |
| </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="sched_setscheduler.html"><B>sched_setscheduler</B>(2)</A> | |
| , <A HREF="sched_getscheduler.html"><B>sched_getscheduler</B>(2)</A> | |
| , <A HREF="sched_getparam.html"><B>sched_getparam</B>(2)</A> , | |
| <A HREF="pthread_attr_setschedpolicy.html"><B>pthread_attr_setschedpolicy</B>(3)</A> | |
| , <A HREF="pthread_attr_setschedparam.html"><B>pthread_attr_setschedparam</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> | |
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