fix: mise en place d'une commande PS, correction de bogues

include/process.h

@@ -10,13 +10,15 @@
 #define MAXNUMPROCESS	256
 
 #define PROCESS_STATUS_FREE   0x0
-#define PROCESS_STATUS_READY  0xF0
+#define PROCESS_STATUS_READY  0x1
-#define PROCESS_STATUS_RUN    0x1
+#define PROCESS_STATUS_RUN    0x2
-#define PROCESS_STATUS_SLEEP  0x2
+#define PROCESS_STATUS_SLEEP  0x3
+#define PROCESS_STATUS_ALL    0xFF
 
 #define TASK_STATUS_READY	0x0
 #define TASK_STATUS_RUN		0x1
-#define TASK_STATUS_STOP	0xFF
+#define TASK_STATUS_STOP	0x2
+#define TASK_STATUS_ALL		0xFF
 
 /* ELF type */
 #define ET_NONE 	0	//No file type
@@ -196,12 +198,14 @@ pid_t     clone(void);
 pid_t     exec(u8* entry, u8* args, bool kerneltask);
 
 void      switchtask(tid_t tid);
-process* getnextprocess(pid_t pid);
+process* getnextprocess(process *aprocess, u32 status);
-task*     getnexttask(void);
+task* getnexttask(task* atask, u32 status);
+task*     getschedule(void);
 task* findtask(tid_t tid);
 task* findcurrenttask(void);
 process* findprocess(pid_t pid);
 process* findcurrentprocess(void);
+task* findfirsttask(process* aprocess);
 
 tid_t createtask(pid_t pid,u8 *entry, bool kerneltask);
 void      deletetask(tid_t tid);

include/shell.h

@@ -30,3 +30,4 @@ int     detectpci();
 int     showmem();
 int     testmem();
 int     testtask();
+int	  ps();

lib/process.c

@@ -152,10 +152,10 @@ void initprocesses(void)
 	processes = (process *) vmalloc(sizeof(process) * MAXNUMPROCESS);
 	while (i < MAXNUMPROCESS)
 	{
-		processes[i].pid = NULL;
+		processes[i].pid = i+1;
 		processes[i++].status = PROCESS_STATUS_FREE;
 	}
-	pid_t pid=getfreepid();
+	pid_t pid=(pid_t)1;
 	process *aprocess=findprocess(pid);
 	if (aprocess==NULL) return NULL;
 	aprocess->pid = pid;
@@ -173,23 +173,17 @@ void initprocesses(void)
 
 pid_t getfreepid(void)
 {
-	if (lastpid==0 || lastpid>MAXNUMPROCESS)
+	if ((u32)lastpid==0 || lastpid>MAXNUMPROCESS)
-		lastpid==1;
+		lastpid=(pid_t)1;
-	u32     i = lastpid;
+	process* aprocess=findprocess(lastpid);
-	u32     parsed = 0;
+	aprocess=getnextprocess(aprocess, PROCESS_STATUS_FREE);
-	while (processes[i++].status != PROCESS_STATUS_FREE
+	if (aprocess == NULL)
-	       && parsed++ < MAXNUMPROCESS)
-	{
-		if (i >= MAXNUMPROCESS)
-			i = 0;
-	}
-	if (parsed > MAXNUMPROCESS)
 	{
 		printf("PANIC: plus d'emplacement disponible pour un novueau processus\n");
 		return NULL;
 	}
-	lastpid=i;
+	lastpid=aprocess->pid;
-	return (pid_t)i;
+	return lastpid;
 }
 
 /*******************************************************************************/
@@ -285,40 +279,74 @@ void switchtask(tid_t tid)
 	iret();
 }
 
-
 /*******************************************************************************/
 /* Cherche le prochain processus */
-process* getnextprocess(pid_t pid)
+
+process* getnextprocess(process* aprocess, u32 status)
 {
-	u32     i = (u32) pid;
+	u32     i = (u32) aprocess->pid;
-	while (processes[i++].status != PROCESS_STATUS_RUN)
+	u32     parsed = 0;
+	while (parsed++ < MAXNUMPROCESS && ((status != PROCESS_STATUS_ALL && processes[i++].status != status) ||
+	 (status == PROCESS_STATUS_ALL && processes[i++].status == PROCESS_STATUS_FREE)))
 	{
 		if (i >= MAXNUMPROCESS)
 			i = 0;
 	}
-	return &processes[i-1];
+	if (parsed > MAXNUMPROCESS)
+		return NULL;
+	else	
+		return &processes[i-1];
+}
+
+/*******************************************************************************/
+/* Cherche la prochaine tâche du processus */
+
+task* getnexttask(task *atask, u32 status)
+{
+	task *next=atask;
+	while (next!=NULL)
+	{
+		next=TAILQ_NEXT(next, tailq);
+		if (next!=NULL && (status == TASK_STATUS_ALL || next->status == status))
+			return next;
+	}
+	return NULL;
 }
 
 /*******************************************************************************/
 /* Cherche la prochaine tâche */
-task*     getnexttask(void)
+
+task* getschedule(void)
 {
 	process *aprocess=findcurrentprocess();
+	task *next=findcurrenttask();
 	u32 flag=0;
-	task *next;
 	while(flag<2) {
 		if (aprocess==NULL) return NULL;
-		TAILQ_FOREACH(next, &aprocess->task_head, tailq)
+		if (next==NULL)
+			next=findfirsttask(aprocess);
+		while(true)
 		{
-			if (next->status == TASK_STATUS_RUN)
+			if (next!=NULL)
-				if (current.pid != next->tid.pid || next->tid.number>current.number)
-					return next;
 				if (current.pid==next->tid.pid && current.number==next->tid.number)
 					flag++;
-		}
+				else
-		aprocess=getnextprocess(aprocess->pid);
+					return next;
+			else
+				break;
+			next=getnexttask(next,TASK_STATUS_RUN);
+		}			
+		aprocess=getnextprocess(aprocess,PROCESS_STATUS_RUN);
 	}
-	return NULL;
+}
+
+/*******************************************************************************/
+/* Cherche la première tâche du processeur */
+
+task* findfirsttask(process* aprocess)
+{
+	task *first;
+	return TAILQ_FIRST(&aprocess->task_head);
 }
 
 /*******************************************************************************/
@@ -371,7 +399,7 @@ void runtask(tid_t tid)
 	if (atask->status == TASK_STATUS_READY)
 	{
 		atask->status = TASK_STATUS_RUN;
-		switchtask(tid);
+		//switchtask(tid);
 	}
 	sti();
 }
@@ -463,7 +491,7 @@ pid_t createprocess(u8 *src, bool kerneltask)
 	current.number = 0;
 	process* new=findcurrentprocess();
 	if (new==NULL) return NULL;
-	new->pid = current.pid;
+	//new->pid = current.pid;
 	new->pdd = virtual_pd_create();
 	TAILQ_INIT(&new->page_head);
 	TAILQ_INIT(&new->task_head);
@@ -514,7 +542,7 @@ void runprocess(pid_t pid)
 		task *atask=findtask(tid);
 		if (atask==NULL) return;
 		atask->status=TASK_STATUS_RUN;
-		switchtask(tid);
+		//switchtask(tid);
 	}
 	sti();
 }

lib/scheduler.c

@@ -81,11 +81,11 @@ __attribute__ ((noreturn)) void timer_handler(regs *dump)
 	showchar(0, 0, curs[curspos], 7);
 	curspos = (curspos + 1) & 0x3;
 	time++;
-	task *new=getnexttask();
+	task *new=getschedule();
 	if (new!=NULL)
 	{
 		task *old=findcurrenttask();
-		memcpy(&dump, &old->dump, sizeof(dump), 0);
+		memcpy(dump, &old->dump, sizeof(regs), 0);
 		switchtask(new->tid);
 	}
 	if (dump->cs==SEL_KERNEL_CODE)

lib/shell.c

@@ -45,6 +45,7 @@ static command commands[] = {
 	{"mem", "", &showmem},
 	{"testmem", "", &testmem},
 	{"testtask", "", &testtask},
+	{"ps", "", &ps},
 };
 
 /*******************************************************************************/
@@ -88,6 +89,21 @@ int test(void)
 	return;
 }
 
+/*******************************************************************************/
+/* Afiche les processus */
+
+int ps()
+{
+	print("Processus en memoire\r\n[   PID  | Status |\r\n");
+	process* aprocess=findprocess((pid_t)1);	
+	while(true)
+	{
+		printf("|%Y|%Y|\r\n",(u32)aprocess->pid,aprocess->status);
+		aprocess=getnextprocess(aprocess,PROCESS_STATUS_ALL);
+		if (aprocess==NULL || aprocess->pid==(pid_t)1) break; 
+	}
+}
+
 /*******************************************************************************/
 /* Test l'usage de création de tâche */
 

programs/test2.c

@@ -8,6 +8,7 @@
 
 void main(void)
 {
+	print("demarrage...\r\n");
 	while (true)
 	{
 		if (getticks()%100000==0)