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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.

 */

/** @addtogroup genericproc

 * @{

 */

/** @file

 */

#ifndef KERN_THREAD_H_

#define KERN_THREAD_H_

#include <synch/waitq.h>

#include <proc/task.h>

#include <cpu.h>

#include <synch/rwlock.h>

#include <adt/btree.h>

#include <mm/slab.h>

#include <arch/cpu.h>

#include <mm/tlb.h>

#include <proc/uarg.h>

#define THREAD_STACK_SIZE   STACK_SIZE

extern char *thread_states[];

/* Thread flags */

#define THREAD_FLAG_WIRED   (1 << 0)    /**< Thread cannot be migrated to another CPU. */

#define THREAD_FLAG_STOLEN  (1 << 1)    /**< Thread was migrated to another CPU and has not run yet. */

#define THREAD_FLAG_USPACE  (1 << 2)    /**< Thread executes in userspace. */

/** Thread list lock.

 *

 * This lock protects all link_t structures chained in threads_head.

 * Must be acquired before T.lock for each T of type thread_t.

 *

 */

extern spinlock_t threads_lock;

extern btree_t threads_btree;           /**< B+tree containing all threads. */

extern void thread_init(void);

extern thread_t *thread_create(void (* func)(void *), void *arg, task_t *task, int flags, char *name, bool uncounted);

extern void thread_ready(thread_t *t);

extern void thread_exit(void) __attribute__((noreturn));

#ifndef thread_create_arch

extern void thread_create_arch(thread_t *t);

#endif

#ifndef thr_constructor_arch

extern void thr_constructor_arch(thread_t *t);

#endif

#ifndef thr_destructor_arch

extern void thr_destructor_arch(thread_t *t);

#endif

extern void thread_sleep(uint32_t sec);

extern void thread_usleep(uint32_t usec);

#define thread_join(t)  thread_join_timeout((t), SYNCH_NO_TIMEOUT, SYNCH_FLAGS_NONE)

extern int thread_join_timeout(thread_t *t, uint32_t usec, int flags);

extern void thread_detach(thread_t *t);

extern void thread_register_call_me(void (* call_me)(void *), void *call_me_with);

extern void thread_print_list(void);

extern void thread_destroy(thread_t *t);

extern void thread_update_accounting(void);

extern bool thread_exists(thread_t *t);

extern void thread_interrupt_sleep(thread_t *t);

/* Fpu context slab cache */

extern slab_cache_t *fpu_context_slab;

/** Thread syscall prototypes. */

unative_t sys_thread_create(uspace_arg_t *uspace_uarg, char *uspace_name);

unative_t sys_thread_exit(int uspace_status);

#endif

/** @}

 */