diff --git a/src/nzg_iface.h b/src/nzg_iface.h
index b74393b..aeba9c3 100644
--- a/src/nzg_iface.h
+++ b/src/nzg_iface.h
@@ -4,16 +4,17 @@
 
 #include "nzg_global.h"
 #define MSGSPACE_DEFAULT_MODE 0600
+#define MSGSPACE_ID_LEN 32
 
-typedef char * msgSpaceId;
+typedef char msgSpaceId[MSGSPACE_ID_LEN];
 
-typedef char * msgSpaceListId;
-typedef char * msgSpaceListElemId;
+typedef char msgSpaceListId[4*MSGSPACE_ID_LEN];
+typedef char msgSpaceListElemId[4*MSGSPACE_ID_LEN];
 
-typedef char * msgSpacePoolDataId;
-typedef char * msgSpacePoolId;
-typedef char * msgSpaceQueueDataId;
-typedef char * msgSpaceQueueId;
+typedef char msgSpacePoolDataId[4*MSGSPACE_ID_LEN];
+typedef char msgSpacePoolId[4*MSGSPACE_ID_LEN];
+typedef char msgSpaceQueueDataId[4*MSGSPACE_ID_LEN];
+typedef char msgSpaceQueueId[4*MSGSPACE_ID_LEN];
 
   /* pid[] */
   /* liste des processus demandeurs */ 
diff --git a/src/nzg_pool.c b/src/nzg_pool.c
new file mode 100644
index 0000000..c807c3f
--- /dev/null
+++ b/src/nzg_pool.c
@@ -0,0 +1,53 @@
+# include "libnazgul.h"
+
+/* pid[]
+		liste process demandeurs */
+
+int msgPoolCreate(
+		msgSpacePoolId poolId,
+		int buffNb,
+		int buffSize
+	) {
+	
+	int poolFd;
+	static int poolNb;
+	msgSpacePoolId id;
+	
+	if (msgSpacePoolId2nzgPoolId(id,poolId,poolNb) == -1){
+	  fprintf( stderr, "msgPoolId creation failed for id %s\n",
+		(char*)poolId );
+	  return -1;
+	}
+	
+	poolFd=shm_open(id,O_RDWR|O_CREAT|O_EXCL|O_TRUNC,MSGSPACE_DEFAULT_MODE);
+	if (poolFd == -1 ) {
+	fprintf( stderr, "msgPool creation failed: %s\n",
+		strerror( errno ) );
+	return -1;
+	}
+
+	// on met le pool a la taille voulue pour qu'il
+	// puisse contenir les buffs
+	if (ftruncate(poolFd, sizeof((buffSize)*buffNb)) == -1){
+	fprintf( stderr, "msgPool resizing failed: %s\n",
+		strerror( errno ) );
+	return -1;
+  }
+
+	close(poolFd);
+
+	return 0;
+}
+
+int msgSpacePoolId2nzgPoolId(msgSpacePoolId dest,msgSpacePoolId src, int num){
+  if (strlen(src)>MSGSPACE_ID_LEN){
+	return -1;
+  }
+  sprintf(dest,"/nzgSpacesPool%s%d",(char *)src,num);
+  return 0;
+}
+
+//TODO: msgPoolAllocate
+//	//donne l'adr en mappant in the memory
+	//poolAddr = mmap(NULL, sizeof(*msgPool), PROT_NONE, MAP_SHARED, poolFd, 0);
+
diff --git a/src/nzg_proto.h b/src/nzg_proto.h
index 2353ac9..3ab05eb 100644
--- a/src/nzg_proto.h
+++ b/src/nzg_proto.h
@@ -1,23 +1,17 @@
 #ifndef _NZG_PROTO
 #define _NZG_PROTO 1
 
+/* nzg_list.c */
 char **msgSpaceIdList(void);
-
-void * msgAllocate(
-	msgSpace * space, //espace de message concerné
-	int pool, //numéro de pool ou réaliser l'allocation
-	int taille, //si l'argument précédent est ANYPOOL, taille requise
-	int option // 0 ou NONBLOCK
-	);
-
-
-/* nzg_create.c */
-msgSpace *msgSpaceCreate(
-	msgSpaceId spaceId, int queueNb, int poolNb, msgPool *queueNbCar
-	);
-
+/* nzg_pool.c */
+int msgPoolCreate(msgSpacePoolId poolId, int buffNb, int buffSize);
+int msgSpacePoolId2nzgPoolId(msgSpacePoolId dest, msgSpacePoolId src, int num);
+/* nzg_spaces.c */
+msgSpace *msgSpaceCreate(msgSpaceId spaceId, int queueNb, int poolNb, msgPool *queueNbCar);
 msgSpace *msgSpaceOpen(msgSpaceId spaceId);
-void msgSpaceDelete(msgSpaceId spaceId);
-msgSpaceId msgSp2nzgId(msgSpaceId spaceId);
+int msgSpaceDelete(msgSpaceId spaceId);
+int msgSp2nzgId(msgSpaceId dest, const msgSpaceId src);
+/* nzg_state.c */
+
 
 #endif
diff --git a/src/nzg_spaces.c b/src/nzg_spaces.c
index a1ca57c..7aa57c9 100644
--- a/src/nzg_spaces.c
+++ b/src/nzg_spaces.c
@@ -14,7 +14,7 @@ msgSpace * msgSpaceCreate(
 	int poolNb, 
 	msgPool * queueNbCar ){
   msgSpaceId nzgId;
-  msgSpaceList mSList; 
+  //msgSpaceList mSList; 
   int mSFd; // shm file descriptor
   int i;
   static int mSIdNum=-1;
@@ -27,7 +27,7 @@ msgSpace * msgSpaceCreate(
 
   /** on créee le nouvel element **/
   printf("PAGESIZE : %d\n",(int)PAGESIZE);
-  nzgId=msgSp2nzgId(spaceId);
+  msgSp2nzgId(spaceId,nzgId);
   mSFd=shm_open(
 	  nzgId,
 	  O_RDWR|O_CREAT|O_EXCL|O_TRUNC,
@@ -87,7 +87,8 @@ msgSpace * msgSpaceCreate(
 
 msgSpace * msgSpaceOpen(msgSpaceId spaceId){
   int shmId;
-  char * nzgId=msgSp2nzgId(spaceId);
+  msgSpaceId nzgId;
+  if (msgSp2nzgId(nzgId,spaceId));
   if ((shmId=shm_open(nzgId,O_RDWR,MSGSPACE_DEFAULT_MODE)) < 0){
 	perror("shm_open");
 	return NULL;
@@ -95,21 +96,26 @@ msgSpace * msgSpaceOpen(msgSpaceId spaceId){
   return NULL;
 }
 
-void msgSpaceDelete(msgSpaceId spaceId){
+int msgSpaceDelete(msgSpaceId spaceId){
   //int shmId;
-  msgSpaceId nzgId=msgSp2nzgId(spaceId);
-  int er;
-  if ((er=shm_unlink(nzgId))<0){
+  msgSpaceId nzgId;
+  if (msgSp2nzgId(nzgId,spaceId) == -1){
+	//TODO: message d'erreur
+	return -1;
+ }
+  
+  if (shm_unlink(nzgId)<0){
 	perror("shm_unlink");
+	return -1;
   };
+  return 0;
 }
 
-msgSpaceId msgSp2nzgId(msgSpaceId spaceId){
-  char * resNzgId;
-  int slen;
-  slen=strlen(spaceId);
-  resNzgId = (char *)malloc(sizeof(char)*(slen+11));
+int msgSp2nzgId(msgSpaceId dest,const msgSpaceId src ){
+  if (strlen(src)>MSGSPACE_ID_LEN){
+	return -1;
+  }
   /* sprintf(resNzgId,"/tmp/.nzg-%s",(char *)spaceId); */
-  sprintf(resNzgId,"/nzgSpace%s",(char *)spaceId);
-  return ((msgSpaceId)resNzgId);
+  sprintf(dest,"/nzgSpace%s",(char *)src);
+  return 0;
 }