pthread_attr_setschedpolicy Subroutine Purpose Sets the value of the schedpolicy attribute of a thread attributes object. Library Threads Library (libpthreads.a) Syntax #include
int pthread_attr_setschedpolicy (attr, schedpolicy) pthread_attr_t *attr; int schedpolicy; Description The pthread_attr_setschedpolicy subroutine sets the value of the schedpolicy attribute of the thread attributes object attr. This attribute specifies the scheduling policy of a thread created with this attributes object. Note: The pthread.h header file must be the first included file of each source file using the threads library. Parameters attr Specifes the thread attributes object. schedpolicy Specifies the scheduling policy to set. It must 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. Return Values Upon successful completion, 0 is returned. Otherwise, an error code is returned. Error Codes The pthread_attr_setschedpolicy 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 policy parameter is not supported. Implementation Specifics 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. Related Information The pthread_attr_getschedpolicy subroutine, pthread_attr_init subroutine, pthread_create subroutine. Threads Scheduling. Threads Library Options and Threads Library Quick Reference.