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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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PTHREAD_...OCEILING(3P) POSIX Programmer's Manual PTHREAD_...OCEILING(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.
pthread_mutexattr_getprioceiling, pthread_mutexattr_setprioceiling
— get and set the prioceiling attribute of the mutex attributes
object (REALTIME THREADS)
#include <pthread.h>
int pthread_mutexattr_getprioceiling(const pthread_mutexattr_t
*restrict attr, int *restrict prioceiling);
int pthread_mutexattr_setprioceiling(pthread_mutexattr_t *attr,
int prioceiling);
The pthread_mutexattr_getprioceiling() and
pthread_mutexattr_setprioceiling() functions, respectively, shall
get and set the priority ceiling attribute of a mutex attributes
object pointed to by attr which was previously created by the
function pthread_mutexattr_init().
The prioceiling attribute contains the priority ceiling of
initialized mutexes. The values of prioceiling are within the
maximum range of priorities defined by SCHED_FIFO.
The 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
prioceiling are within the maximum range of priorities defined
under the SCHED_FIFO scheduling policy.
The behavior is undefined if the value specified by the attr
argument to pthread_mutexattr_getprioceiling() or
pthread_mutexattr_setprioceiling() does not refer to an
initialized mutex attributes object.
Upon successful completion, the pthread_mutexattr_getprioceiling()
and pthread_mutexattr_setprioceiling() functions shall return
zero; otherwise, an error number shall be returned to indicate the
error.
These functions may fail if:
EINVAL The value specified by prioceiling is invalid.
EPERM The caller does not have the privilege to perform the
operation.
These functions shall not return an error code of [EINTR].
The following sections are informative.
None.
None.
If an implementation detects that the value specified by the attr
argument to pthread_mutexattr_getprioceiling() or
pthread_mutexattr_setprioceiling() does not refer to an
initialized mutex attributes object, it is recommended that the
function should fail and report an [EINVAL] error.
None.
pthread_cond_destroy(3p), pthread_create(3p),
pthread_mutex_destroy(3p)
The Base Definitions volume of POSIX.1‐2017, pthread.h(0p)
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 .
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 .
IEEE/The Open Group 2017 PTHREAD_...OCEILING(3P)
Pages that refer to this page: pthread.h(0p), pthread_mutexattr_setprioceiling(3p)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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