sched.c File Reference

Scheduling. More...

#include <l4/sys/syscalls.h>
#include <l4/thread/thread.h>
#include <l4/semaphore/semaphore.h>
#include <l4/dde_linux/dde.h>
#include <linux/sched.h>
#include "internal.h"
#include "__config.h"
#include "fastcall.h"

Go to the source code of this file.

Scheduling Primitives
To circumvent real user-level threads and scheduling we support only sane user context states generated by bug-free drivers. The task structure has a new member - dde_sem binary semaphore - and each process could sleep on this until awakened by any event. This is from kernel/%sched.c
#define	SLEEP_ON_VAR
#define	SLEEP_ON_HEAD
#define	SLEEP_ON_TAIL
int	try_to_wake_up (struct task_struct *p, int synchronous)
	Generic wake up for user contexts.
int	FASTCALL (wake_up_process(struct task_struct *p))
	Wake up dedicated user context.
void	process_timeout (unsigned long __data)
	Handle Timeout for schedule_timeout().
signed long	FASTCALL (schedule_timeout(signed long timeout))
	Schedule process but wake me at least after timeout.
void	schedule (void)
	Schedule process.
void	__wake_up_common (wait_queue_head_t *q, unsigned int mode, int nr_exclusive, const int sync)
	Generic wake up for user contexts in wait queues.
void	FASTCALL (__wake_up(wait_queue_head_t *q, unsigned int mode, int nr))
	Wake up wait queue entries.
void	FASTCALL (__wake_up_sync(wait_queue_head_t *q, unsigned int mode, int nr))
	Wake up wait queue entries (sync).
void	FASTCALL (interruptible_sleep_on(wait_queue_head_t *q))
	Sleep on wait queue (interruptible by signals).
long	FASTCALL (interruptible_sleep_on_timeout(wait_queue_head_t *q, long timeout))
	Sleep on wait queue (interruptible by signals and timeout).
void	FASTCALL (sleep_on(wait_queue_head_t *q))
	Sleep on wait queue.
long	FASTCALL (sleep_on_timeout(wait_queue_head_t *q, long timeout))
	Sleep on wait queue (interruptible by timeout).
void	daemonize (void)
	Put all the gunge required to become a kernel thread without attached user resources in one place where it belongs.

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Detailed Description

Scheduling.

Date:

08/28/2003

Author:

Christian Helmuth <ch12@os.inf.tu-dresden.de>

Definition in file sched.c.

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Define Documentation

#define SLEEP_ON_HEAD

Value: wq_write_lock_irqsave(&q->lock,flags); \ __add_wait_queue(q, &wait); \ wq_write_unlock(&q->lock); Definition at line 209 of file sched.c.

#define SLEEP_ON_TAIL

Value: wq_write_lock_irq(&q->lock); \ __remove_wait_queue(q, &wait); \ wq_write_unlock_irqrestore(&q->lock,flags); Definition at line 214 of file sched.c.

#define SLEEP_ON_VAR

Value: unsigned long flags; \ wait_queue_t wait; \ init_waitqueue_entry(&wait, current); Definition at line 204 of file sched.c.

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