Originální popis anglicky:
pthread_mutexattr_getprioceiling, pthread_mutexattr_setprioceiling - get and set
the prioceiling attribute of the mutex attributes object (
REALTIME
THREADS)
Návod, kniha: POSIX Programmer's Manual
#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.
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.
The
pthread_mutexattr_getprioceiling() and
pthread_mutexattr_setprioceiling() functions may fail if:
- EINVAL
- The value specified by attr or 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.
None.
None.
pthread_cond_destroy() ,
pthread_create() ,
pthread_mutex_destroy() , the Base Definitions volume of
IEEE Std 1003.1-2001,
<pthread.h>
Portions of this text are reprinted and reproduced in electronic form from IEEE
Std 1003.1, 2003 Edition, Standard for Information Technology -- Portable
Operating System Interface (POSIX), The Open Group Base Specifications Issue
6, Copyright (C) 2001-2003 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
.
