diff options
Diffstat (limited to 'mpx.h')
| -rw-r--r-- | mpx.h | 41 |
1 files changed, 33 insertions, 8 deletions
@@ -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;
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