#include "libnazgul.h"


// verouille le semaphore de la liste

int msgSpaceListLock(){
  sem_t * msgSpaceListSemFd;
  msgSpaceListSemId spaceListSemId;
  strcpy(spaceListSemId,DEFAULT_MSGSPACELISTSEMID);

  /* Ouverture d'un semafore */
  msgSpaceListSemFd=sem_open(spaceListSemId,O_CREAT,0666,1);
  if(msgSpaceListSemFd==SEM_FAILED){
	NZG_ERROR("sem_open",spaceListSemId);
	goto ERROR;
  }

  /* Pose d'un semaphore et le verrouille */
  if(sem_wait(msgSpaceListSemFd)==-1){
	NZG_ERROR("sem_wait",spaceListSemId);
	goto ERROR;
  }

  /*	Ferme le semaphore*/
  /*		if(sem_close(msgSpaceListSemFd)==-1){
			NZG_ERROR("sem_close",spaceListSemId);
			return -1;
			}*/
  sem_close(msgSpaceListSemFd);

  return 0;
ERROR:
  return -1;
}


// deverouille le semaphore de la liste
int msgSpaceListUnlock(){
  sem_t * msgSpaceListSemFd;
  msgSpaceListSemId spaceListSemId;
  strcpy(spaceListSemId,DEFAULT_MSGSPACELISTSEMID);


  /*Ouverture dun semaphore*/
  msgSpaceListSemFd=sem_open(spaceListSemId,O_CREAT,0666,0);
  if(msgSpaceListSemFd==SEM_FAILED){
	NZG_ERROR("sem_open",spaceListSemId);
	goto ERROR;
  }


  /*Relachement du semaphore*/
  if(sem_post(msgSpaceListSemFd)==-1){
	NZG_ERROR("sem_relache",spaceListSemId);
	goto ERROR;
  }


  /*	Ferme le semaphore */
  if(sem_close(msgSpaceListSemFd)==-1){
	NZG_ERROR("sem_close",spaceListSemId);
	goto ERROR;
  }

  return 0;
ERROR:
  return -1;
};