Adding upstream version 4.22.0.upstream/4.22.0

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 117 insertions, 0 deletions

diff --git a/upstream/archlinux/man3p/pthread_setschedprio.3p b/upstream/archlinux/man3p/pthread_setschedprio.3p
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+'\" et
+.TH PTHREAD_SETSCHEDPRIO "3P" 2017 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\"
+.SH PROLOG
+This manual page is part of the POSIX Programmer's Manual.
+The Linux implementation of this interface may differ (consult
+the corresponding Linux manual page for details of Linux behavior),
+or the interface may not be implemented on Linux.
+.\"
+.SH NAME
+pthread_setschedprio
+\(em dynamic thread scheduling parameters access
+(\fBREALTIME THREADS\fR)
+.SH SYNOPSIS
+.LP
+.nf
+#include <pthread.h>
+.P
+int pthread_setschedprio(pthread_t \fIthread\fP, int \fIprio\fP);
+.fi
+.SH DESCRIPTION
+The
+\fIpthread_setschedprio\fR()
+function shall set the scheduling priority for the thread whose thread
+ID is given by
+.IR thread
+to the value given by
+.IR prio .
+See
+.IR "Scheduling Policies"
+for a description on how this function call affects the ordering of the
+thread in the thread list for its new priority.
+.P
+If the
+\fIpthread_setschedprio\fR()
+function fails, the scheduling priority of the target thread shall not
+be changed.
+.SH "RETURN VALUE"
+If successful, the
+\fIpthread_setschedprio\fR()
+function shall return zero; otherwise, an error number shall be
+returned to indicate the error.
+.SH ERRORS
+The
+\fIpthread_setschedprio\fR()
+function may fail if:
+.TP
+.BR EINVAL
+The value of
+.IR prio
+is invalid for the scheduling policy of the specified thread.
+.TP
+.BR EPERM
+The caller does not have appropriate privileges to set the scheduling
+priority of the specified thread.
+.P
+The
+\fIpthread_setschedprio\fR()
+function shall not return an error code of
+.BR [EINTR] .
+.LP
+.IR "The following sections are informative."
+.SH EXAMPLES
+None.
+.SH "APPLICATION USAGE"
+None.
+.SH RATIONALE
+The
+\fIpthread_setschedprio\fR()
+function provides a way for an application to temporarily raise its
+priority and then lower it again, without having the undesired
+side-effect of yielding to other threads of the same priority. This is
+necessary if the application is to implement its own strategies for
+bounding priority inversion, such as priority inheritance or priority
+ceilings. This capability is especially important if the implementation
+does not support the Thread Priority Protection or Thread Priority
+Inheritance options, but even if those options are supported it is
+needed if the application is to bound priority inheritance for other
+resources, such as semaphores.
+.P
+The standard developers considered that while it might be preferable
+conceptually to solve this problem by modifying the specification of
+\fIpthread_setschedparam\fR(),
+it was too late to make such a change, as there may be implementations
+that would need to be changed. Therefore, this new function was
+introduced.
+.P
+If an implementation detects use of a thread ID after the end of its
+lifetime, it is recommended that the function should fail and report an
+.BR [ESRCH] 
+error.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "Scheduling Policies",
+.IR "\fIpthread_getschedparam\fR\^(\|)"
+.P
+The Base Definitions volume of POSIX.1\(hy2017,
+.IR "\fB<pthread.h>\fP"
+.\"
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1-2017, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 7, 2018 Edition,
+Copyright (C) 2018 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
+http://www.opengroup.org/unix/online.html .
+.PP
+Any typographical or formatting errors that appear
+in this page are most likely
+to have been introduced during the conversion of the source files to
+man page format. To report such errors, see
+https://www.kernel.org/doc/man-pages/reporting_bugs.html .