From 42a6fc274f0e526fb64c38d59b8871746e73ec15 Mon Sep 17 00:00:00 2001
From: "Glenn Y. Rolland" <glenux@glenux.net>
Date: Tue, 17 Sep 2019 08:58:16 +0200
Subject: [PATCH] Improve code (reedit)

---
 src/nzg_global.h |  1 +
 src/nzg_iface.h  | 23 ++++++++++++++----
 src/nzg_spaces.c | 62 +++++++++++++++++++++++++++++++++++-------------
 3 files changed, 66 insertions(+), 20 deletions(-)

diff --git a/src/nzg_global.h b/src/nzg_global.h
index e89e4e5..34a84fa 100644
--- a/src/nzg_global.h
+++ b/src/nzg_global.h
@@ -8,6 +8,7 @@
 #include <fcntl.h> /* pour O_RDWR */
 #include <sys/types.h>
 #include <sys/mman.h> /* shm_open */
+#include <errno.h>
 
 #define PAGESIZE sysconf(_SC_PAGESIZE)
 #endif
diff --git a/src/nzg_iface.h b/src/nzg_iface.h
index ab20c61..b74393b 100644
--- a/src/nzg_iface.h
+++ b/src/nzg_iface.h
@@ -6,27 +6,42 @@
 #define MSGSPACE_DEFAULT_MODE 0600
 
 typedef char * msgSpaceId;
+
+typedef char * msgSpaceListId;
 typedef char * msgSpaceListElemId;
+
 typedef char * msgSpacePoolDataId;
 typedef char * msgSpacePoolId;
 typedef char * msgSpaceQueueDataId;
 typedef char * msgSpaceQueueId;
 
+  /* pid[] */
+  /* liste des processus demandeurs */ 
 typedef struct MsgPool {
-
+  msgSpacePoolId id;
+  int bufferNb;
+  int bufferSize;
+  int allocDispBuffer;
+  int allocOverload;
 } msgPool;
 
+/* TODO: queueId */
+
 typedef struct MsgSpace {
-  
+  msgSpaceId id;
+  int poolNb;
+  int queueNb;
+    int pid; 
+  msgSpacePoolDataId poolDataId;
 } msgSpace;
 
 
+/* struct msgSpaceListElem * next; */
 
 typedef struct MsgSpaceListElem {
   void * id;
   int ownerPid;
-  /* struct msgSpaceListElem * next; */
-  msgSpaceListElemId next;
+    msgSpaceListElemId next;
 } * msgSpaceList, msgSpaceListElem;
 
 
diff --git a/src/nzg_spaces.c b/src/nzg_spaces.c
index 55012b2..a1ca57c 100644
--- a/src/nzg_spaces.c
+++ b/src/nzg_spaces.c
@@ -1,6 +1,5 @@
 #include "libnazgul.h"
-#include <sys/types.h>
-#include <sys/mman.h> 
+ 
 
 /*
  * spaceId : identifiant externe de l'espace de msg
@@ -14,41 +13,71 @@ msgSpace * msgSpaceCreate(
 	int queueNb, 
 	int poolNb, 
 	msgPool * queueNbCar ){
-  msgSpace * result;
-  int shmId;
   msgSpaceId nzgId;
   msgSpaceList mSList; 
+  int mSFd; // shm file descriptor
+  int i;
   static int mSIdNum=-1;
+  msgSpace * mSAddr;
 
   mSIdNum++;
+  mSAddr=NULL;
  /** recuperation de la liste des msgSpace **/
  /* (creation si elle n'existe pas */
 
   /** on créee le nouvel element **/
   printf("PAGESIZE : %d\n",(int)PAGESIZE);
   nzgId=msgSp2nzgId(spaceId);
-  shmId=shm_open(
+  mSFd=shm_open(
 	  nzgId,
-	  O_RDWR|O_CREAT|O_EXCL,
+	  O_RDWR|O_CREAT|O_EXCL|O_TRUNC,
 	  MSGSPACE_DEFAULT_MODE
 	  );
-  if (shmId < 0 ) {
-	perror("shm_open");
+  if (mSFd == -1 ) {
+	fprintf( stderr, "msgSpace %s creation failed: %s\n",
+ 		(char*)nzgId,
+		strerror( errno ) );
 	return NULL;
   }
 
+  //on redimentionne l'element
+  if (ftruncate(mSFd, sizeof(PAGESIZE)) == -1){
+	fprintf( stderr, "msgSpace resizing failed: %s\n",
+		strerror( errno ) );
+	return NULL;
+  }
+  
+  /* Map the memory object */
+  mSAddr = mmap( 0, sizeof( *mSAddr ),
+            PROT_READ | PROT_WRITE,
+            MAP_SHARED, mSFd, 0 );
+    if( mSAddr == MAP_FAILED ) {
+        fprintf( stderr, "mmap failed: %s\n",
+            strerror( errno ) );
+        return NULL;
+    }
 
-  /* on ajoute spaceId a la liste des msgSpace connus */
+	printf( "Map addr is 0x%08x\n", (int)mSAddr );
 
-  /* on crée queueNb files de messages */
+	/* on ferme le descripteur du fichier */
+	close(mSFd);
 
-  /* on créer poolNb pool de buffers */
+	/* TODO: on ajoute spaceId a la liste des msgSpace connus */
 
-  /* on attache tout ce beau monde au spaceId */
+	/* TODO: on crée queueNb files de messages */
+	
+	/* on créer poolNb pool de buffers */
+	/* et on "attache" tout ce beau monde au spaceId */
+	for (i=0;i<poolNb;i++){
+	  // creation d'une pool
 
-  /* on renvoie un pointeur sur le bon spaceId */
-  result=NULL;
-  return result;
+	 // mSAddr->
+	  
+	}
+	
+
+	/* on renvoie un pointeur sur le bon spaceId */
+	return mSAddr;
 }
 
 
@@ -80,6 +109,7 @@ msgSpaceId msgSp2nzgId(msgSpaceId spaceId){
   int slen;
   slen=strlen(spaceId);
   resNzgId = (char *)malloc(sizeof(char)*(slen+11));
-  sprintf(resNzgId,"/tmp/.nzg-%s",(char *)spaceId);
+  /* sprintf(resNzgId,"/tmp/.nzg-%s",(char *)spaceId); */
+  sprintf(resNzgId,"/nzgSpace%s",(char *)spaceId);
   return ((msgSpaceId)resNzgId);
 }