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/*
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************************************************************
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*/
/***************************************************************************
*
* Copyright (c) 1999 Mentor Graphics Corporation.
*
*
*
*
*
****************************************************************************
*/
#include "queue.h"
#include "kernel.h"
#include "task.h"
#include "processor.h"
#include "delay.h"
#include "q.h"
void sc_qjam(int qid, char *msg, int *errp)
{
cpu_interrupt_t ps;
struct qentry *queue;
struct tentry *tcbp;
int tid;
if ((unsigned) qid < vmc_nqueue) {
*errp = RET_OK;
queue = &vmc_qcb[qid];
disable(ps);
if ((tid = queue->tid) != NO_TID) {
tcbp = &vmc_tasktab[tid];
tcbp->object.queue.qid = NO_QID;
tcbp->object.queue.message = msg;
queue->tid = NO_TID;
if (tcbp->tstate & TBSDELAY) {
if ((vmc_dlynempty = vmc_dequeued(tid)) != 0)
vmc_dlytop = get_vmc_dlytop();
tcbp->tstate &= ~TBSDELAY;
}
vmc_sched_disable();
tcbp->tstate &= ~TBSQUEUE;
if (tcbp->tstate == 0) {
/* if (vmc_tasktab[tid].tstate == 0) { updated by chwon */
tcbp->tstate = TBSREADY;
vmc_ready_insert(tid, ps);
}
if (vmc_readyhead != vmc_exectid)
vmc_sched_needed = 1;
vmc_sched_enable();
restore(ps);
return;
}
if (queue->count < queue->maxcount) {
if (queue->head)
--queue->head;
else
queue->head = queue->maxcount-1;
queue->item[queue->head] = msg;
queue->count++;
}
else
*errp = ER_QFL;
restore(ps);
return;
}
*errp = ER_QID;
}