/*
* Change the active task state to wait state and connect to the timer wait
* queue and the object wait queue. Also set 'wid' in 'knl_ctxtsk'.
*/
EXPORT void knl_gcb_make_wait( GCB *gcb, TMO tmout )
{
*knl_ctxtsk->wercd = E_TMOUT;
if ( tmout != TMO_POL ) {
knl_ctxtsk->wid = gcb->objid;
knl_make_wait(tmout, gcb->objatr);
if ( (gcb->objatr & TA_TPRI) != 0 ) {
knl_queue_insert_tpri(knl_ctxtsk, &gcb->wait_queue);
} else {
QueInsert(&knl_ctxtsk->tskque, &gcb->wait_queue);
}
}
}
/*
* When the task priority changes, adjust the task position at the wait queue.
* It is called only if the object attribute TA_TPRI is specified.
*
*/
EXPORT void knl_gcb_change_priority( GCB *gcb, TCB *tcb )
{
QueRemove(&tcb->tskque);
knl_queue_insert_tpri(tcb, &gcb->wait_queue);
}
/*
* Forward Rendezvous to Other Port
*/
SYSCALL ER tk_fwd_por_impl( ID porid, UINT calptn, RNO rdvno, VP msg, INT cmsgsz )
{
PORCB *porcb;
TCB *caltcb, *tcb;
QUEUE *queue;
RNO new_rdvno;
ER ercd = E_OK;
CHECK_PORID(porid);
CHECK_PAR(calptn != 0);
CHECK_RDVNO(rdvno);
CHECK_PAR(cmsgsz >= 0);
CHECK_INTSK();
porcb = get_porcb(porid);
caltcb = get_tcb(knl_get_tskid_rdvno(rdvno));
BEGIN_CRITICAL_SECTION;
if ( porcb->porid == 0 ) {
ercd = E_NOEXS;
goto error_exit;
}
#if CHK_PAR
if ( cmsgsz > porcb->maxcmsz ) {
ercd = E_PAR;
goto error_exit;
}
#endif
if ( (caltcb->state & TS_WAIT) == 0
|| caltcb->wspec != &knl_wspec_rdv
|| rdvno != caltcb->winfo.rdv.rdvno ) {
ercd = E_OBJ;
goto error_exit;
}
if ( porcb->maxrmsz > caltcb->winfo.rdv.maxrmsz ) {
ercd = E_OBJ;
goto error_exit;
}
#if CHK_PAR
if ( cmsgsz > caltcb->winfo.rdv.maxrmsz ) {
ercd = E_PAR;
goto error_exit;
}
#endif
/* Search accept wait task */
queue = porcb->accept_queue.next;
while ( queue != &porcb->accept_queue ) {
tcb = (TCB*)queue;
queue = queue->next;
if ( (calptn & tcb->winfo.acp.acpptn) == 0 ) {
continue;
}
/* Send message */
new_rdvno = knl_gen_rdvno(caltcb);
if ( cmsgsz > 0 ) {
memcpy(tcb->winfo.acp.msg, msg, (UINT)cmsgsz);
}
*tcb->winfo.acp.p_rdvno = new_rdvno;
*tcb->winfo.acp.p_cmsgsz = cmsgsz;
knl_wait_release_ok(tcb);
/* Change rendezvous end wait of the other task */
caltcb->winfo.rdv.rdvno = new_rdvno;
caltcb->winfo.rdv.msg = caltcb->winfo.cal.msg;
caltcb->winfo.rdv.maxrmsz = porcb->maxrmsz;
caltcb->winfo.rdv.p_rmsgsz = caltcb->winfo.cal.p_rmsgsz;
goto error_exit;
}
/* Change the other task to rendezvous call wait */
caltcb->wspec = ( (porcb->poratr & TA_TPRI) != 0 )?
&knl_wspec_cal_tpri: &knl_wspec_cal_tfifo;
caltcb->wid = porid;
caltcb->winfo.cal.calptn = calptn;
caltcb->winfo.cal.msg = caltcb->winfo.rdv.msg;
caltcb->winfo.cal.cmsgsz = cmsgsz;
caltcb->winfo.cal.p_rmsgsz = caltcb->winfo.rdv.p_rmsgsz;
knl_timer_insert(&caltcb->wtmeb, TMO_FEVR,
(CBACK)knl_wait_release_tmout, caltcb);
if ( (porcb->poratr & TA_TPRI) != 0 ) {
knl_queue_insert_tpri(caltcb, &porcb->call_queue);
} else {
QueInsert(&caltcb->tskque, &porcb->call_queue);
}
if ( cmsgsz > 0 ) {
memcpy(caltcb->winfo.cal.msg, msg, (UINT)cmsgsz);
}
error_exit:
END_CRITICAL_SECTION;
return ercd;
}
/*
* Lock mutex
*/
SYSCALL ER tk_loc_mtx_impl( ID mtxid, TMO tmout )
{
MTXCB *mtxcb;
TCB *mtxtsk;
ATR mtxatr;
ER ercd = E_OK;
CHECK_MTXID(mtxid);
CHECK_TMOUT(tmout);
CHECK_DISPATCH();
mtxcb = get_mtxcb(mtxid);
BEGIN_CRITICAL_SECTION;
if ( mtxcb->mtxid == 0 ) {
ercd = E_NOEXS;
goto error_exit;
}
if ( mtxcb->mtxtsk == knl_ctxtsk ) {
ercd = E_ILUSE; /* Multiplexed lock */
goto error_exit;
}
mtxatr = mtxcb->mtxatr & TA_CEILING;
if ( mtxatr == TA_CEILING ) {
if ( knl_ctxtsk->bpriority < mtxcb->ceilpri ) {
/* Violation of highest priority limit */
ercd = E_ILUSE;
goto error_exit;
}
}
mtxtsk = mtxcb->mtxtsk;
if ( mtxtsk == NULL ) {
/* Get lock */
mtxcb->mtxtsk = knl_ctxtsk;
mtxcb->mtxlist = knl_ctxtsk->mtxlist;
knl_ctxtsk->mtxlist = mtxcb;
if ( mtxatr == TA_CEILING ) {
if ( knl_ctxtsk->priority > mtxcb->ceilpri ) {
/* Raise its own task to the highest
priority limit */
knl_change_task_priority(knl_ctxtsk, mtxcb->ceilpri);
}
}
} else {
ercd = E_TMOUT;
if ( tmout == TMO_POL ) {
goto error_exit;
}
if ( mtxatr == TA_INHERIT ) {
if ( mtxtsk->priority > knl_ctxtsk->priority ) {
/* Raise the priority of task during
locking to the same priority as its
own task */
knl_change_task_priority(mtxtsk, knl_ctxtsk->priority);
}
}
/* Ready for wait */
knl_ctxtsk->wspec = ( mtxatr == TA_TFIFO )? &knl_wspec_mtx_tfifo:
( mtxatr == TA_INHERIT )? &knl_wspec_mtx_inherit:
&knl_wspec_mtx_tpri;
knl_ctxtsk->wercd = &ercd;
knl_ctxtsk->wid = mtxcb->mtxid;
knl_make_wait(tmout, mtxcb->mtxatr);
if ( mtxatr == TA_TFIFO ) {
QueInsert(&knl_ctxtsk->tskque, &mtxcb->wait_queue);
} else {
knl_queue_insert_tpri(knl_ctxtsk, &mtxcb->wait_queue);
}
}
error_exit:
END_CRITICAL_SECTION;
return ercd;
}