Section: POSIX Programmer's Manual (3P)
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.
--- get and set the prioceiling attribute of the mutex attributes object
int pthread_mutexattr_getprioceiling(const pthread_mutexattr_t
*restrict attr, int *restrict prioceiling);
int pthread_mutexattr_setprioceiling(pthread_mutexattr_t *attr,
functions, respectively, shall get and set the priority ceiling
attribute of a mutex attributes object pointed to by
which was previously created by the function
attribute contains the priority ceiling of initialized mutexes. The
are within the maximum range of priorities defined by SCHED_FIFO.
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
are within the maximum range of priorities defined under the SCHED_FIFO
The behavior is undefined if the value specified by the
does not refer to an initialized mutex attributes object.
Upon successful completion, the
functions shall return zero; otherwise, an error number shall be
returned to indicate the error.
These functions may fail if:
The value specified by
The caller does not have the privilege to perform the operation.
These functions shall not return an error code of
The following sections are informative.
If an implementation detects that the value specified by the
does not refer to an initialized mutex attributes object, it is
recommended that the function should fail and report an
The Base Definitions volume of POSIX.1-2008,
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
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