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+'\" et
+.TH PTHREAD_MUTEXATTR_GETPRIOCEILING "3P" 2013 "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_mutexattr_getprioceiling,
+pthread_mutexattr_setprioceiling
+\(em get and set the prioceiling attribute of the mutex attributes object
+(\fBREALTIME THREADS\fP)
+.SH SYNOPSIS
+.LP
+.nf
+#include <pthread.h>
+.P
+int pthread_mutexattr_getprioceiling(const pthread_mutexattr_t
+    *restrict \fIattr\fP, int *restrict \fIprioceiling\fP);
+int pthread_mutexattr_setprioceiling(pthread_mutexattr_t *\fIattr\fP,
+    int \fIprioceiling\fP);
+.fi
+.SH DESCRIPTION
+The
+\fIpthread_mutexattr_getprioceiling\fR()
+and
+\fIpthread_mutexattr_setprioceiling\fR()
+functions, respectively, shall get and set the priority ceiling
+attribute of a mutex attributes object pointed to by
+.IR attr
+which was previously created by the function
+\fIpthread_mutexattr_init\fR().
+.P
+The
+.IR prioceiling
+attribute contains the priority ceiling of initialized mutexes. The
+values of
+.IR prioceiling
+are within the maximum range of priorities defined by SCHED_FIFO.
+.P
+The
+.IR prioceiling
+attribute defines the priority ceiling of initialized mutexes, which is
+the minimum priority level at which the critical section guarded by the
+mutex is executed. In order to avoid priority inversion, the priority
+ceiling of the mutex shall be set to a priority higher than or equal to
+the highest priority of all the threads that may lock that mutex. The
+values of
+.IR prioceiling
+are within the maximum range of priorities defined under the SCHED_FIFO
+scheduling policy.
+.P
+The behavior is undefined if the value specified by the
+.IR attr
+argument to
+\fIpthread_mutexattr_getprioceiling\fR()
+or
+\fIpthread_mutexattr_setprioceiling\fR()
+does not refer to an initialized mutex attributes object.
+.SH "RETURN VALUE"
+Upon successful completion, the
+\fIpthread_mutexattr_getprioceiling\fR()
+and
+\fIpthread_mutexattr_setprioceiling\fR()
+functions shall return zero; otherwise, an error number shall be
+returned to indicate the error.
+.SH ERRORS
+These functions may fail if:
+.TP
+.BR EINVAL
+The value specified by
+.IR prioceiling
+is invalid.
+.TP
+.BR EPERM
+The caller does not have the privilege to perform the operation.
+.P
+These functions 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
+If an implementation detects that the value specified by the
+.IR attr
+argument to
+\fIpthread_mutexattr_getprioceiling\fR()
+or
+\fIpthread_mutexattr_setprioceiling\fR()
+does not refer to an initialized mutex attributes object, it is
+recommended that the function should fail and report an
+.BR [EINVAL] 
+error.
+.SH "FUTURE DIRECTIONS"
+None.
+.SH "SEE ALSO"
+.IR "\fIpthread_cond_destroy\fR\^(\|)",
+.IR "\fIpthread_create\fR\^(\|)",
+.IR "\fIpthread_mutex_destroy\fR\^(\|)"
+.P
+The Base Definitions volume of POSIX.1\(hy2008,
+.IR "\fB<pthread.h>\fP"
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 7, Copyright (C) 2013 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group.
+(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/online.html .
+
+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 .