#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;
};