/*
* pthread_attr_setschedpolicy: sets the scheduling policy.
*/
int
pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy)
{
thrattr_t *ap;
if (attr != NULL && (ap = attr->__pthread_attrp) != NULL &&
policy != SCHED_SYS && get_info_by_policy(policy) != NULL) {
ap->policy = policy;
return (0);
}
return (EINVAL);
}
int
posix_spawnattr_setschedpolicy(
posix_spawnattr_t *attr,
int schedpolicy)
{
spawn_attr_t *sap = attr->__spawn_attrp;
if (sap == NULL || schedpolicy == SCHED_SYS)
return (EINVAL);
/*
* Cache the policy information for later use
* by the vfork() child of posix_spawn().
*/
if (get_info_by_policy(schedpolicy) == NULL)
return (errno);
sap->sa_schedpolicy = schedpolicy;
return (0);
}
int
pthread_create(pthread_t *thread, const pthread_attr_t *attr,
void * (*start_routine)(void *), void *arg)
{
ulwp_t *self = curthread;
const thrattr_t *ap = attr? attr->__pthread_attrp : def_thrattr();
const pcclass_t *pccp;
long flag;
pthread_t tid;
int error;
update_sched(self);
if (ap == NULL)
return (EINVAL);
/* validate explicit scheduling attributes */
if (ap->inherit == PTHREAD_EXPLICIT_SCHED &&
(ap->policy == SCHED_SYS ||
(pccp = get_info_by_policy(ap->policy)) == NULL ||
ap->prio < pccp->pcc_primin || ap->prio > pccp->pcc_primax))
return (EINVAL);
flag = ap->scope | ap->detachstate | ap->daemonstate | THR_SUSPENDED;
error = _thrp_create(ap->stkaddr, ap->stksize, start_routine, arg,
flag, &tid, ap->guardsize, ap->name);
if (error == 0) {
/*
* Record the original inheritence value for
* pthread_getattr_np(). We should always be able to find the
* thread.
*/
(void) _thr_setinherit(tid, ap->inherit);
if (ap->inherit == PTHREAD_EXPLICIT_SCHED &&
(ap->policy != self->ul_policy ||
ap->prio != (self->ul_epri ? self->ul_epri :
self->ul_pri))) {
/*
* The SUSv3 specification requires pthread_create()
* to fail with EPERM if it cannot set the scheduling
* policy and parameters on the new thread.
*/
error = _thr_setparam(tid, ap->policy, ap->prio);
}
if (error) {
/*
* We couldn't determine this error before
* actually creating the thread. To recover,
* mark the thread detached and cancel it.
* It is as though it was never created.
*/
ulwp_t *ulwp = find_lwp(tid);
if (ulwp->ul_detached == 0) {
ulwp->ul_detached = 1;
ulwp->ul_usropts |= THR_DETACHED;
(void) __lwp_detach(tid);
}
ulwp->ul_cancel_pending = 2; /* cancelled on creation */
ulwp->ul_cancel_disabled = 0;
ulwp_unlock(ulwp, self->ul_uberdata);
} else if (thread) {
*thread = tid;
}
(void) thr_continue(tid);
}
/* posix version expects EAGAIN for lack of memory */
if (error == ENOMEM)
error = EAGAIN;
return (error);
}
