pcb.h File Reference

PCB. More...

#include <common/memory.h>

Go to the source code of this file.

Typedefs
typedef int	reg_t
typedef int	pid_t
typedef void *	addr_t
typedef enum State	state_t
typedef struct Pcb	pcb_t
typedef struct Context	context_t
typedef struct Stack	stack_t

Enumerations
enum	State { ready = 0, running = 1, terminated = 2 }

Functions
pcb_t *	init_pcb (pid_t pid, addr_t start_function)
context_t *	init_context ()
stack_t *	init_stack ()
void	set_pcb_state (pcb_t *pcb, state_t state)
state_t	get_pcb_state (pcb_t *pcb)
pid_t	get_pid (pcb_t *pcb)
context_t *	get_context (pcb_t *pcb)
addr_t	get_pc (pcb_t *pcb)

Detailed Description

PCB.

Typedef Documentation

state_t

typedef enum State state_t

Enum representing the current state of a process

Enumeration Type Documentation

State

enum State

Enum representing the current state of a process

Function Documentation

get_context()

context_t* get_context

(

pcb_t *

pcb

)

Returns the CPU context of a process.

Parameters

pcb

A PCB.

Returns

Pointer to a CPU context.

get_pc()

addr_t get_pc

(

pcb_t *

pcb

)

Returns the PC of a process.

Parameters

pcb

A PCB.

Returns

The current PC of the process

get_pid()

pid_t get_pid

(

pcb_t *

pcb

)

Returns the PID of a process.

Parameters

pcb

A PCB.

Returns

The PID of the process.

init_context()

context_t* init_context

(

)

Allocates space for the CPU context of a PCB.

Returns

Pointer to a CPU context.

init_pcb()

pcb_t* init_pcb	(	pid_t	pid,
		addr_t	start_function
	)

Allocates space for and initializes the starting state of a process.

Parameters

pid	A process id
start_function	A function pointer to the starting function of the process

Returns

Pointer to the resulting PCB

init_stack()

stack_t* init_stack

(

)

Allocates space for a process stack.

Returns

Pointer to a stack space.

set_pcb_state()

void set_pcb_state	(	pcb_t *	pcb,
		state_t	state
	)

Sets the state of a process.

Parameters

pcb	Pointer to a PCB.
state	New state of the process.