Sets the value of the schedparam attribute of a thread attributes object.
Threads Library (libpthreads.a)
#include <pthread.h> #include <sys/sched.h>
int pthread_attr_setschedparam (attr, schedparam) pthread_attr_t *attr; const struct sched_param *schedparam;
The pthread_attr_setschedparam subroutine sets the value of the schedparam attribute of the thread attributes object attr. 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.
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.
|attr||Specifies the thread attributes object.|
|schedparam||Points to where the scheduling parameters to set are stored. The sched_priority field must be in the range from 1 to 127, where 1 is the least favored priority, and 127 the most favored.|
Upon successful completion, 0 is returned. Otherwise, an error code is returned.
The pthread_attr_setschedparam subroutine is unsuccessful if the following is true:
|EINVAL||The attr parameter is not valid.|
|ENOSYS||The priority scheduling POSIX option is not implemented.|
|ENOTSUP||The value of the schedparam attribute is not supported.|
This subroutine is part of the Base Operating System (BOS) Runtime.
The pthread_attr_getschedparam subroutine, pthread_attr_init subroutine, pthread_create subroutine, the pthread.h file.
Threads Scheduling in AIX Version 4.3 General Programming Concepts: Writing and Debugging Programs.
Threads Library Options and Threads Library Quick Reference in AIX Version 4.3 General Programming Concepts: Writing and Debugging Programs.