Set the priority ceiling of a mutex attribute object
#include <pthread.h> int pthread_mutexattr_setprioceiling( pthread_mutexattr_t* attr, int prioceiling );
- A pointer to the pthread_mutexattr_t object that you want to set the attribute in.
- The new value for the priority ceiling.
Use the -l c option to qcc to link against this library. This library is usually included automatically.
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().
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().
- Invalid value specified by attr or prioceiling.
- The calling process doesn't have the required permission; see procmgr_ability().
Last modified: 2014-06-24