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

int msgSpaceListInit(){
  int spaceListFd;
  sem_t * spaceListSemFd;

  msgSpaceListSemId spaceListSemId;
  msgSpaceListId spaceListId;
  strcpy(spaceListSemId,DEFAULT_MSGSPACELISTSEMID);
  strcpy(spaceListId,DEFAULT_MSGSPACELISTID);

  /* Creation de semaphore */
  spaceListSemFd=sem_open(spaceListSemId,O_CREAT|O_EXCL,0666,0);
  if(spaceListSemFd==SEM_FAILED){
	spaceListSemFd=sem_open(spaceListSemId,O_CREAT,0666,0);
	if(spaceListSemFd==SEM_FAILED){
	NZG_ERROR("sem_open",spaceListSemId);
	goto ERROR;
  }
 }



  /*Fait un segment de memoir partager sur espace de listelement*/
  spaceListFd=shm_open(spaceListId,O_RDWR|O_CREAT|O_EXCL|O_TRUNC,0600);
  if (spaceListFd == -1){
	spaceListFd=shm_open(spaceListId,O_RDWR|O_TRUNC,0600);	
	if (spaceListFd == -1){
	  NZG_ERROR("shm_open",spaceListId);
	  goto ERROR;
	} else {
	  close(spaceListFd);
	  goto EXISTING;
	}
  }
if (ftruncate(spaceListFd, sizeof(msgSpaceList)) < 0){
	NZG_ERROR("ftruncate",spaceListId);
	goto ERROR;
  }
close(spaceListFd);

 msgSpaceList *list;
 list=msgSpaceListOpen();
 strcpy(list->id,spaceListId);
 strcpy(list->headId,spaceListId);
 strcpy(list->tailId,spaceListId);
 msgSpaceListClose(list);
 
  msgSpaceListUnlock();

  return 0;
ERROR:
  return -1;
EXISTING:
  return 0;
};