as of 2013-12-042013-12-04

1 files changed, 33 insertions, 8 deletions

diff --git a/mpx.h b/mpx.h
index 305e2a0..3a9ad85 100644
--- a/mpx.h
+++ b/mpx.h
@@ -14,6 +14,8 @@
 #define  PRT  2       /* The printer device - LPT1.               */

 #define  COM  3       /* The serial port - COM1.                  */

 

+#define DEBUG_PRINTS 0 // 1 for print out debugging statements

+

 /* MPX System request types. */

 

 #define  READ   0  /* Read from device. */

@@ -32,6 +34,17 @@ struct dirstruct {         /* Data type for a directory entry.        */
 typedef struct dirstruct dir;  /* Use dir as the data typer name.     */

 

 /**

+ * parm is a struct to keep track of parameters passed to sys_req

+ */

+struct parmstruct {

+  int op_number;

+  int op_type;

+  char *buffer;

+  int *length;

+};

+typedef struct parmstruct parm;

+

+/**

  * PCB

  */

 

@@ -43,7 +56,7 @@ typedef struct dirstruct dir;  /* Use dir as the data typer name.     */
 #define BLOCKED       2

 #define NOT_SUSPENDED 0

 #define SUSPENDED     1

-#define STACK_SIZE  400

+#define STACK_SIZE  900

 

 struct pcbstruct {

 	struct pcbstruct * chain;

@@ -57,7 +70,7 @@ struct pcbstruct {
 	unsigned stack_ptr;

 	unsigned stack[STACK_SIZE];

 	unsigned loadaddr;

-	unsigned parm_add; // added during mod because sys_call said so

+	parm *parm_add;

 	int mem_size;

 };

 typedef struct pcbstruct pcb;

@@ -86,6 +99,8 @@ typedef struct pcbstruct pcb;
 struct dcb_struct {

   unsigned current_op;

   unsigned * event_flag;

+  pcb * current_pcb;

+  pcb * pcb_head;

   far int * length;

   far char * buffer;

   int count;

@@ -115,8 +130,8 @@ 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 cmd_allocate(char *[]);

+//void cmd_free(char *[]);

 

 void cmd_load(char *[]);

 void cmd_resume(char *[]);

@@ -124,7 +139,7 @@ void cmd_run(char *[]);
 void cmd_suspend(char *[]);

 void cmd_terminate(char *[]);

 void cmd_setpri(char *[]);

-void cmd_dispatch();

+//void cmd_dispatch();

 void cmd_clock(char *[]);

 

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

@@ -187,10 +202,15 @@ int com_write_int();
 #define PDR 0x3bc

 

 int prt_open(int *);

-int prt_write(char far *, int *);

+int prt_write(char far *, int far *);

 int prt_close(void);

 void interrupt prt_int(void);

 

+

+int IO_complete(int, int*);

+int IO_sched(pcb *);

+void IO_sup(pcb *);

+

 /*

  *   Global variable EXTERN directives.

  *

@@ -201,11 +221,16 @@ void interrupt prt_int(void);
  */

 #define DIR_SIZE 20

 extern dcb com;

+extern dcb prt;

+extern dcb con;

 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 * ready_queue_locked;

 extern pcb * io_init_queue;

 extern pcb * cop; /* The currently operating process. */

 extern unsigned sys_stack[];

-extern unsigned sp_save; /* So that mod 4 can return to cmd_dispatch */
\ No newline at end of file
+extern unsigned sp_save; /* So that mod 4 can return to cmd_dispatch */

+extern int prt_eflag;

+extern int con_eflag;

+extern int com_eflag;