102 lines
3 KiB
C
102 lines
3 KiB
C
#include "syslib.h"
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#include <assert.h>
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#include <machine/archtypes.h>
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#include <minix/timers.h>
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#include <string.h>
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#include "kernel/config.h"
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#include "kernel/const.h"
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#include "kernel/type.h"
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#include "kernel/proc.h"
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/*===========================================================================*
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* sched_inherit *
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*===========================================================================*/
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int sched_inherit(endpoint_t scheduler_e,
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endpoint_t schedulee_e, endpoint_t parent_e, unsigned maxprio,
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endpoint_t *newscheduler_e)
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{
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int rv;
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message m;
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assert(_ENDPOINT_P(scheduler_e) >= 0);
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assert(_ENDPOINT_P(schedulee_e) >= 0);
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assert(_ENDPOINT_P(parent_e) >= 0);
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assert(maxprio < NR_SCHED_QUEUES);
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assert(newscheduler_e);
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memset(&m, 0, sizeof(m));
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m.m_lsys_sched_scheduling_start.endpoint = schedulee_e;
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m.m_lsys_sched_scheduling_start.parent = parent_e;
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m.m_lsys_sched_scheduling_start.maxprio = maxprio;
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/* Send the request to the scheduler */
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if ((rv = _taskcall(scheduler_e, SCHEDULING_INHERIT, &m))) {
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return rv;
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}
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/* Store the process' scheduler. Note that this might not be the
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* scheduler we sent the SCHEDULING_INHERIT message to. That scheduler
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* might have forwarded the scheduling message on to another scheduler
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* before returning the message.
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*/
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*newscheduler_e = m.m_sched_lsys_scheduling_start.scheduler;
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return (OK);
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}
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/*===========================================================================*
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* sched_start *
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*===========================================================================*/
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int sched_start(endpoint_t scheduler_e,
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endpoint_t schedulee_e,
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endpoint_t parent_e,
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int maxprio,
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int quantum,
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int cpu,
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endpoint_t *newscheduler_e)
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{
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int rv;
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message m;
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/* No scheduler given? We are done. */
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if(scheduler_e == NONE) {
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return OK;
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}
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assert(_ENDPOINT_P(schedulee_e) >= 0);
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assert(_ENDPOINT_P(parent_e) >= 0);
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assert(maxprio >= 0);
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assert(maxprio < NR_SCHED_QUEUES);
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assert(quantum > 0);
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assert(newscheduler_e);
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/* The KERNEL must schedule this process. */
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if(scheduler_e == KERNEL) {
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if ((rv = sys_schedctl(SCHEDCTL_FLAG_KERNEL,
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schedulee_e, maxprio, quantum, cpu)) != OK) {
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return rv;
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}
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*newscheduler_e = scheduler_e;
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return OK;
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}
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/* A user-space scheduler must schedule this process. */
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memset(&m, 0, sizeof(m));
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m.m_lsys_sched_scheduling_start.endpoint = schedulee_e;
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m.m_lsys_sched_scheduling_start.parent = parent_e;
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m.m_lsys_sched_scheduling_start.maxprio = maxprio;
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m.m_lsys_sched_scheduling_start.quantum = quantum;
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/* Send the request to the scheduler */
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if ((rv = _taskcall(scheduler_e, SCHEDULING_START, &m))) {
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return rv;
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}
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/* Store the process' scheduler. Note that this might not be the
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* scheduler we sent the SCHEDULING_START message to. That scheduler
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* might have forwarded the scheduling message on to another scheduler
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* before returning the message.
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*/
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*newscheduler_e = m.m_sched_lsys_scheduling_start.scheduler;
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return (OK);
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}
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