#include "libnazgul.h"
#include "ids.h"

int msgQueueElemCreate(
	msgQueueElemId finalQueueElemId ,
	msgQueueId queueId,
	int counter){
  msgQueueElemId queueElemId;

  msgQueueElemIdIntern(queueElemId,queueId,counter);
  strcpy(finalQueueElemId,queueElemId);

  int queueElemFd;
  queueElemFd=shm_open(queueElemId,
	  O_RDWR|O_CREAT|O_EXCL|O_TRUNC,
	  SHM_DEFAULT_MODE);
  if (queueElemFd == -1 ) {
	NZG_ERROR("shm_open : msgQueueElem creation",queueElemId);
	goto ERROR;
  }

  if (ftruncate(queueElemFd, sizeof(msgQueueElem)) < 0){
	NZG_ERROR("ftruncate", queueElemId);
	goto ERROR;
  }

  close(queueElemFd);
  return 0;
ERROR:
  return -1;
}