int k_release_processor(){
PCB * pcb = kernel->current_process;
if(pcb == NULL)
return 1;
if(pcb->id != NULL_PID){
pcb->state = READY;
enPQ(kernel->rq, pcb, pcb->priority);
}
k_atomic(off);
k_process_switch();
return 0;
}
MsgEnv * k_request_msg_env()
{
while (msg_env_queue_is_empty(free_env_q))
{
if (current_process->is_i_process)
{
return NULL;
}
proc_pq_enqueue(env_blocked_pq, current_process);
k_process_switch(P_BLOCKED_ON_ENV_REQUEST);
}
MsgEnv *env = msg_env_queue_dequeue(free_env_q);
return env;
}
MsgEnv * k_request_msg_env (){
MsgEnv * env = kernel->availMsgEnvQueue->nextMsgEnv;
while (!env){ // For user processes its messing up here for some reason....
PCB * pcb = kernel->current_process;
// Process becomes blocked on envelope_request
if(pcb->state == IS_IPROCESS){ return NULL;}
pcb->state = BLOCK_ON_ENV;
enPQ(kernel->bq, pcb, pcb->priority);
k_process_switch();
env = kernel->availMsgEnvQueue->nextMsgEnv;
}
kernel->availMsgEnvQueue->nextMsgEnv = kernel->availMsgEnvQueue->nextMsgEnv->nextMsgEnv;
env->nextMsgEnv = NULL;
//clear message
memset(env->msg, 0, MSG_SIZE);
return env;
}
MsgEnv * k_receive_message(){
PCB * pcb = kernel->current_process;
while(pcb->msgEnvQueue == NULL){
if(pcb->state != IS_IPROCESS){
pcb->state = BLOCK_ON_RCV;
//enPQ(kernel->bq, pcb, pcb->priority);
k_process_switch();
}else{
return NULL;
}
}
MsgEnv * result = pcb->msgEnvQueue;
pcb->msgEnvQueue = result->nextMsgEnv;
result->nextMsgEnv = NULL;
enTraceBuf(kernel->firstReceived, result);
return result;
}
int k_release_processor()
{
proc_pq_enqueue(ready_pq, current_process);
k_process_switch(P_READY);
return CODE_SUCCESS;
}
