as of 2013-09-302013-09-30

1 files changed, 48 insertions, 1 deletions

diff --git a/mpx.h b/mpx.h
index dfecbed..7d64022 100644
--- a/mpx.h
+++ b/mpx.h
@@ -31,6 +31,36 @@ struct dirstruct {         /* Data type for a directory entry.        */
 

 typedef struct dirstruct dir;  /* Use dir as the data typer name.     */

 

+/**

+ * PCB

+ */

+

+#define FREE          0

+#define SYS_PROCESS   1

+#define APP_PROCESS   2

+#define READY         0

+#define RUNNING       1

+#define BLOCKED       2

+#define NOT_SUSPENDED 0

+#define SUSPENDED     1

+

+

+struct pcbstruct {

+	struct pcbstruct * chain;

+	struct pcbstruct * next;

+	struct pcbstruct * prev;

+	char name[9];

+	short type;

+	short priority;

+	short state;

+	short suspend;

+	unsigned stack_ptr;

+	unsigned stack[400];

+	unsigned loadaddr;

+	int mem_size;

+};

+typedef struct pcbstruct pcb;

+

 /* Function prototypes. */

 

 /* main.c */

@@ -42,14 +72,28 @@ int get_cmd(char args[]);
 void cmd_version(void);

 void cmd_date(char *[]);

 void cmd_directory(void);

-void cmd_stop(void);

+int cmd_stop(void);

 void cmd_help(char *[]);

 void cmd_prompt(char *[]);

 void cmd_alias(char *[]);

+void cmd_show(char *[]);

+void cmd_allocate(char *[]);

+void cmd_free(char *[]);

 void sys_req(int,int,char *,int *);   /* MPX system request function. */

 int  directory(dir *, int);           /* Support function to load the */

 					  /* directory array.             */

 

+/**

+ * PCB.C

+ */

+pcb * search_pcb(pcb *, char[]);

+pcb * get_pcb(pcb *);

+int free_pcb(pcb *, pcb *);

+int build_pcb(pcb *, char[], int, int, int, int);

+int insert_pcb(pcb**, pcb *, int);

+int remove_pcb(pcb**, pcb *);

+

+

 /*

  *   Global variable EXTERN directives.

  *

@@ -62,3 +106,6 @@ int  directory(dir *, int);           /* Support function to load the */
 

 extern dir direct[];  /* Array of directory entries -     see direct.c */

 extern int directory(dir *direct, int dir_size);

+extern pcb * pcb_list;

+extern pcb * ready_queue;

+extern pcb * io_init_queue;