#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;
}