Use pthread_attr_setschedpolicy() to set the scheduling policy. The POSIX draft standard specifies scheduling policy attributes of SCHED_FIFO (first-in-first-out), SCHED_RR (round-robin), or SCHED_OTHER (an implementation-defined method).
SCHED_FIFO and SCHED_RR are optional in POSIX, and are supported for real time bound threads, only.
Currently, only the Solaris SCHED_OTHER default value is supported in pthreads. For a discussion of scheduling, see the section "Scheduling".
Prototype: int pthread_attr_setschedpolicy(pthread_attr_t *tattr, int policy);
#include <pthread.h> pthread_attr_t tattr; int policy; int ret; /* set the scheduling policy to SCHED_OTHER */ ret = pthread_attr_setschedpolicy(&tattr, SCHED_OTHER);
Returns zero after completing successfully. Any other returned value indicates that an error occurred. When either of the following conditions occurs, the function fails and returns the corresponding value.