tasking.h File Reference

#include <stdint.h>
#include <sys/types.h>

Go to the source code of this file.

Data Structures
struct	Process
struct	Thread

Enumerations
enum	thread_state { THREAD_RUNNING, THREAD_READY, THREAD_EXITED, THREAD_BLOCKED }

Functions
void	tasking_create_task (void *eip, void *cr3, char kmode, char param1_exists, void *param1_arg, char param2_exists, void *param2_arg, char isThread)
void	tasking_init ()
char	tasking_is_privleged ()
pid_t	tasking_get_PID ()
int *	tasking_get_errno_address ()
pid_t	tasking_new_thread (void *start, pid_t pid, char param_exists, void *param_arg)
void	tasking_exit (int code)
void	tasking_block (thread_state newstate)
void	tasking_unblock (pid_t pid, pid_t tid)
void	tasking_yield ()

Variables
Thread *	current_thread
	Currently running thread.

Enumeration Type Documentation

thread_state

enum thread_state

Represents the state of a thread

Enumerator
THREAD_RUNNING	The state of a running thread.
THREAD_READY	The state of a ready to run thread.
THREAD_EXITED	The state of an exited thread.
THREAD_BLOCKED	The state of a generically blocked thread.

Function Documentation

tasking_block()

void tasking_block

(

thread_state

newstate

)

Block the current thread & yield

Parameters

newstate

The state to block it in

tasking_create_task()

void tasking_create_task	(	void *	eip,
		void *	cr3,
		char	kmode,
		char	param1_exists,
		void *	param1_arg,
		char	param2_exists,
		void *	param2_arg,
		char	isThread
	)

Create a task

Parameters

eip	The start address of the task
cr3	The address space of the task
kmode	Whether the task is a kernel mode task
param1_exists	Whether param1_arg is a valid value
param1_arg	The thread's start function first parameter
param2_exists	Whether param2_arg is a valid value
param2_arg	The thread's start function second parameter/
isThread	Whether we are creating a new process or a thread in a process. If we are creating a theead, param2_arg becomes the PID for the newly created thread, and param2_exists must be 0.

tasking_exit()

void tasking_exit

(

int

code

)

Terminate the current thread If the main thread terminates, the whole process terminates.

Note

Currently, calling tasking_exit from any thread terminates the whole process.

Parameters

code	The exit code of the thread

tasking_get_errno_address()

int* tasking_get_errno_address

(

)

Get the adddress of errno for the current thread

Returns

The address of errno

tasking_get_PID()

pid_t tasking_get_PID

(

)

Get the PID of the current thread.

Returns

The current thread's PID

tasking_init()

void tasking_init

(

)

Initialize tasking

tasking_is_privleged()

char tasking_is_privleged

(

)

Check whether the current process is privleged

Returns

whether the current process is privleged

tasking_new_thread()

pid_t tasking_new_thread	(	void *	start,
		pid_t	pid,
		char	param_exists,
		void *	param_arg
	)

Create a new thread

Parameters

start	The start address of the task
pid	The PID that gets the new thread
param_exists	Whether param_arg is a valid value
param_arg	The thread's start function parameter

Returns

the TID of the thread

tasking_unblock()

void tasking_unblock	(	pid_t	pid,
		pid_t	tid
	)

Unblock a thread

Parameters

pid	The PID that contains the thread to unblock
tid	The TID in the process to unblock.

tasking_yield()

void tasking_yield

(

)

Yield to the next ready thread in any process