Returns the current schedpolicy and schedparam attributes of a thread.
Threads Library (libpthreads.a)
#include <pthread.h> #include <sys/sched.h>
int pthread_getschedparam (thread, schedpolicy, schedparam) pthread_t thread; int *schedpolicy; struct sched_param *schedparam;
The pthread_getschedparam subroutine returns the current schedpolicy and schedparam attributes of the thread thread. The schedpolicy attribute specifies the scheduling policy of a thread. It may have one of the following values:
| SCHED_FIFO | Denotes first-in first-out scheduling. |
| SCHED_RR | Denotes round-robin scheduling. |
| SCHED_OTHER | Denotes the default AIX scheduling policy. It is the default value. |
The schedparam attribute specifies the scheduling parameters of a thread created with this attributes object. The sched_priority field of the sched_param structure contains the priority of the thread. It is an integer value.
Note: The pthread.h header file must be the first included file of each source file using the threads library. Otherwise, the -D_THREAD_SAFE compilation flag should be used, or the cc_r compiler used. In this case, the flag is automatically set.
| thread | Specifies the target thread. |
| schedpolicy | Points to where the schedpolicy attribute value will be stored. |
| schedparam | Points to where the schedparam attribute value will be stored. |
Upon successful completion, the current value of the schedpolicy and schedparam attributes are returned via the schedpolicy and schedparam parameters, and 0 is returned. Otherwise, an error code is returned.
The pthread_getschedparam subroutine is unsuccessful if the following is true:
| ESRCH | The thread thread does not exist. |
This subroutine is part of the Base Operating System (BOS) Runtime.
The implementation of this subroutine is dependent on the priority scheduling POSIX option. The priority scheduling POSIX option is implemented in AIX.
The pthread_attr_getschedparam subroutine.
Threads Scheduling in AIX Version 4.3 General Programming Concepts: Writing and Debugging Programs.
Threads Library Options in AIX Version 4.3 General Programming Concepts: Writing and Debugging Programs.
Threads Library Quick Reference in AIX Version 4.3 General Programming Concepts: Writing and Debugging Programs.