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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>sched_getscheduler - get scheduling policy (<B>REALTIME</B>) | |
| </P> | |
| <H2><A HREF="#toc1" NAME="sect1">Synopsis</A></H2> | |
| <P><B>#include <sched.h> </B> | |
| </P> | |
| <P><B>int sched_getscheduler(pid_t</B> <I>pid</I><B>); </B> | |
| </P> | |
| <H2><A HREF="#toc2" NAME="sect2">Description</A></H2> | |
| <P>The <B>sched_getscheduler</B> function shall return the scheduling | |
| policy of the process specified by <I>pid</I>. If the value of <I>pid</I> | |
| is negative, the behavior of the <B>sched_getscheduler</B> function | |
| is unspecified. | |
| </P> | |
| <P>The values that can be returned by <B>sched_getscheduler</B> are | |
| defined in the <I><sched.h></I> header. | |
| </P> | |
| <P><B>Pthreads-w32</B> only supports the <B>SCHED_OTHER</B> policy, | |
| which is the only value that can be returned. However, checks on <I>pid</I> | |
| and permissions are performed first so that the other useful side | |
| effects of this routine are retained.</P> | |
| <P>If a process specified by <I>pid</I> exists, and if the calling | |
| process has permission, the scheduling policy shall be returned for | |
| the process whose process ID is equal to <I>pid</I>. | |
| </P> | |
| <P>If <I>pid</I> is zero, the scheduling policy shall be returned for | |
| the calling process. | |
| </P> | |
| <H2><A HREF="#toc3" NAME="sect3">Return Value</A></H2> | |
| <P>Upon successful completion, the <B>sched_getscheduler</B> function | |
| shall return the scheduling policy of the specified process. If | |
| unsuccessful, the function shall return -1 and set <I>errno</I> to | |
| indicate the error. | |
| </P> | |
| <H2><A HREF="#toc4" NAME="sect4">Errors</A></H2> | |
| <P>The <B>sched_getscheduler</B> function shall fail if: | |
| </P> | |
| <DL> | |
| <DT><B>EPERM</B> | |
| </DT><DD> | |
| The requesting process does not have permission to determine the | |
| scheduling policy of the specified process. | |
| </DD><DT> | |
| <B>ESRCH</B> | |
| </DT><DD STYLE="margin-bottom: 0.5cm"> | |
| No process can be found corresponding to that specified by <I>pid</I>. | |
| </DD></DL> | |
| <P> | |
| <I>The following sections are informative.</I> | |
| </P> | |
| <H2><A HREF="#toc5" NAME="sect5">Examples</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc6" NAME="sect6">Application Usage</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc7" NAME="sect7">Rationale</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc8" NAME="sect8">Future Directions</A></H2> | |
| <P>None. | |
| </P> | |
| <H2><A HREF="#toc9" NAME="sect9">See Also</A></H2> | |
| <P><A HREF="sched_setscheduler.html"><B>sched_setscheduler</B>(3)</A> | |
| , the Base Definitions volume of IEEE Std 1003.1-2001, | |
| <I><sched.h></I> | |
| </P> | |
| <H2><A HREF="#toc10" NAME="sect10">Copyright</A></H2> | |
| <P>Portions of this text are reprinted and reproduced in electronic | |
| form from IEEE Std 1003.1, 2003 Edition, Standard for Information | |
| Technology -- Portable Operating System Interface (POSIX), The Open | |
| Group Base Specifications Issue 6, Copyright (C) 2001-2003 by the | |
| Institute of Electrical and Electronics Engineers, Inc and The Open | |
| Group. In the event of any discrepancy between this version and the | |
| original IEEE and The Open Group Standard, the original IEEE and The | |
| Open Group Standard is the referee document. The original Standard | |
| can be obtained online at <A HREF="http://www.opengroup.org/unix/online.html">http://www.opengroup.org/unix/online.html</A> | |
| . | |
| </P> | |
| <P>Modified by Ross Johnson for use with <A HREF="http://sources.redhat.com/pthreads-win32">Pthreads-w32</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">Examples</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect6" NAME="toc6">Application | |
| Usage</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect7" NAME="toc7">Rationale</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect8" NAME="toc8">Future | |
| Directions</A> | |
| </P> | |
| <LI><P STYLE="margin-bottom: 0cm"><A HREF="#sect9" NAME="toc9">See | |
| Also</A> | |
| </P> | |
| <LI><P><A HREF="#sect10" NAME="toc10">Copyright</A> | |
| </P> | |
| </UL> | |
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