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/*
* Copyright (C) 2001-2004 Jakub Jermar
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __THREAD_H__
#define __THREAD_H__
#include <arch/thread.h>
#include <proc/task.h>
#include <synch/spinlock.h>
#include <arch/context.h>
#include <fpu_context.h>
#include <arch/types.h>
#include <typedefs.h>
#include <time/timeout.h>
#include <synch/rwlock.h>
#include <mm/page.h>
#include <list.h>
#define THREAD_STACK_SIZE PAGE_SIZE
#define THREAD_USER_STACK 1
enum state {
Invalid,
Running,
Sleeping,
Ready,
Entering,
Exiting
};
extern char *thread_states[];
#define X_WIRED (1<<0)
#define X_STOLEN (1<<1)
struct thread {
link_t rq_link; /* run queue link */
link_t wq_link; /* wait queue link */
link_t th_link; /* links to threads within the parent task*/
link_t threads_link;
/* items below are protected by lock */
spinlock_t lock;
void (* thread_code)(void *);
void *thread_arg;
context_t saved_context;
context_t sleep_timeout_context;
fpu_context_t saved_fpu;
waitq_t *sleep_queue;
timeout_t sleep_timeout;
volatile int timeout_pending;
rwlock_type_t rwlock_holder_type;
void (* call_me)(void *);
void *call_me_with;
int state;
int flags;
cpu_t *cpu;
task_t *task;
__u64 ticks;
__u32 tid;
int pri;
ARCH_THREAD_DATA;
__u8 *kstack;
__u8 *ustack;
};
extern spinlock_t threads_lock;
extern link_t threads_head;
static void cushion(void);
extern void thread_init(void);
extern thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, int flags);
extern void thread_ready(thread_t *t);
extern void thread_exit(void);
extern void thread_sleep(__u32 sec);
extern void thread_usleep(__u32 usec);
extern void thread_register_call_me(void (* call_me)(void *), void *call_me_with);
#endif