mirror of https://github.com/mkerrisk/man-pages
104 lines
3.4 KiB
Plaintext
104 lines
3.4 KiB
Plaintext
.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved
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.TH "PTHREAD_ATTR_GETINHERITSCHED" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
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.\" pthread_attr_getinheritsched
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.SH NAME
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pthread_attr_getinheritsched, pthread_attr_setinheritsched \- get and
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set the inheritsched attribute (\fBREALTIME
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THREADS\fP)
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.SH SYNOPSIS
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.LP
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\fB#include <pthread.h>
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.br
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.sp
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int pthread_attr_getinheritsched(const pthread_attr_t *restrict\fP
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\fIattr\fP\fB,
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.br
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\ \ \ \ \ \ int *restrict\fP \fIinheritsched\fP\fB);
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.br
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int pthread_attr_setinheritsched(pthread_attr_t *\fP\fIattr\fP\fB,
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.br
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\ \ \ \ \ \ int\fP \fIinheritsched\fP\fB); \fP
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\fB
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.br
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\fP
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.SH DESCRIPTION
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.LP
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The \fIpthread_attr_getinheritsched\fP(), and \fIpthread_attr_setinheritsched\fP()
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functions, respectively, shall get and set
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the \fIinheritsched\fP attribute in the \fIattr\fP argument.
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.LP
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When the attributes objects are used by \fIpthread_create\fP(), the
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\fIinheritsched\fP attribute determines how the other scheduling attributes
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of the created thread shall be set.
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.TP 7
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PTHREAD_INHERIT_SCHED
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.sp
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Specifies that the thread scheduling attributes shall be inherited
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from the creating thread, and the scheduling attributes in this
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\fIattr\fP argument shall be ignored.
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.TP 7
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PTHREAD_EXPLICIT_SCHED
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.sp
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Specifies that the thread scheduling attributes shall be set to the
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corresponding values from this attributes object.
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.sp
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.LP
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The symbols PTHREAD_INHERIT_SCHED and PTHREAD_EXPLICIT_SCHED are defined
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in the \fI<pthread.h>\fP header.
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.LP
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The following thread scheduling attributes defined by IEEE\ Std\ 1003.1-2001
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are affected by the \fIinheritsched\fP
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attribute: scheduling policy ( \fIschedpolicy\fP), scheduling parameters
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( \fIschedparam\fP), and scheduling contention scope (
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\fIcontentionscope\fP).
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.SH RETURN VALUE
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.LP
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If successful, the \fIpthread_attr_getinheritsched\fP() and \fIpthread_attr_setinheritsched\fP()
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functions shall return zero;
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otherwise, an error number shall be returned to indicate the error.
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.SH ERRORS
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.LP
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The \fIpthread_attr_setinheritsched\fP() function may fail if:
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.TP 7
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.B EINVAL
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The value of \fIinheritsched\fP is not valid.
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.TP 7
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.B ENOTSUP
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An attempt was made to set the attribute to an unsupported value.
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.sp
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.LP
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These functions shall not return an error code of [EINTR].
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.LP
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\fIThe following sections are informative.\fP
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.SH EXAMPLES
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.LP
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None.
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.SH APPLICATION USAGE
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.LP
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After these attributes have been set, a thread can be created with
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the specified attributes using \fIpthread_create\fP(). Using these
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routines does not affect the current running
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thread.
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.SH RATIONALE
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.LP
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None.
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.SH FUTURE DIRECTIONS
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.LP
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None.
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.SH SEE ALSO
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.LP
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\fIpthread_attr_destroy\fP() , \fIpthread_attr_getscope\fP() , \fIpthread_attr_getschedpolicy\fP()
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, \fIpthread_attr_getschedparam\fP() , \fIpthread_create\fP() , the
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Base Definitions volume of IEEE\ Std\ 1003.1-2001, \fI<pthread.h>\fP,
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\fI<sched.h>\fP
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.SH COPYRIGHT
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Portions of this text are reprinted and reproduced in electronic form
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from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
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-- Portable Operating System Interface (POSIX), The Open Group Base
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Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
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Electrical and Electronics Engineers, Inc and The Open Group. In the
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event of any discrepancy between this version and the original IEEE and
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The Open Group Standard, the original IEEE and The Open Group Standard
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is the referee document. The original Standard can be obtained online at
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http://www.opengroup.org/unix/online.html .
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