#include "libnazgul.h"

int msgQueueElemDelete(msgQueueElemId queueElemId){
  msgQueueElem * queueElem;
  msgQueueElemId nextIdToDie;
  
  queueElem = msgQueueElemOpen(queueElemId);
  if (queueElem==NULL){
	NZG_ERROR("msgQueueElemOpen",queueElemId);
	goto ERROR;
  }

  strcpy(nextIdToDie, queueElem->next);
	
  if (msgQueueElemClose(queueElem) < 0){
  	NZG_ERROR("msgQueueElemClose",queueElemId);
	goto ERROR;
  }

  // on détruit l'élément
  shm_unlink(queueElemId);

  if (nextIdToDie != queueElemId){
	return msgQueueElemDelete(nextIdToDie);
  } else {
	printf("msgQueueElemDelete: EOL reached \n");
	// element unique...
	return 0;
  }

ERROR:
  return -1;
}