pthread_mutexattr_setprioceiling()

Set the priority ceiling of a mutex attribute object

Synopsis:

#include <pthread.h>

int pthread_mutexattr_setprioceiling( 
                         pthread_mutexattr_t* attr,
                         int prioceiling );

Arguments:

attr: A pointer to the pthread_mutexattr_t object that you want to set the attribute in.
prioceiling: The new value for the priority ceiling.

Library:

libc

Use the -l c option to qcc to link against this library. This library is usually included automatically.

Description:

The pthread_mutexattr_setprioceiling() function sets the mutex attribute attr's scheduling priority ceiling to prioceiling. Note that attr must have been previously created with pthread_mutexattr_init().

Note: In order to change the priority ceiling to a value above the maximum permitted for unprivileged processes, your process must have the PROCMGR_AID_PRIORITY ability enabled. For more information, see procmgr_ability().

Returns:

EOK: Success.
EINVAL: Invalid value specified by attr or prioceiling.
EPERM: The calling process doesn't have the required permission; see procmgr_ability().

Classification:

POSIX 1003.1 RPP TPP

Safety:
Cancellation point	No
Interrupt handler	No
Signal handler	Yes
Thread	Yes