PTHREAD_MUTEXATTR_GETPRIOCEILING(P) POSIX Programmer's Manual PTHREAD_MUTEXATTR_GETPRIOCEILING(P)
pthread_mutexattr_getprioceiling, pthread_mutexattr_setprioceiling - 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,
The pthread_mutexattr_getprioceiling() and pthread_mutexattr_setprioceiling() functions, respectively, shall get and set the priority ceil-
ing 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 prior-
ity higher than or equal to the highest priority of all the threads that may lock that mutex. The values of prioceiling are within the max-
imum 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; oth-
erwise, 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.
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 Technol-
ogy -- 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 .
IEEE/The Open Group 2003 PTHREAD_MUTEXATTR_GETPRIOCEILING(P)