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/*

 * Copyright (c) 2006 Ondrej Palkovsky

 * 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 libc

 * @{

 */

/** @file

 */

#ifndef LIBC_PSTHREAD_H_

#define LIBC_PSTHREAD_H_

#include <libarch/psthread.h>

#include <libadt/list.h>

#include <libarch/thread.h>

#ifndef context_set

#define context_set(c, _pc, stack, size, ptls)          \

    (c)->pc = (sysarg_t) (_pc);             \

    (c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA;     \

        (c)->tls = (sysarg_t) (ptls);

#endif /* context_set */

#define PSTHREAD_SERIALIZED   1

typedef enum {

    PS_SLEEP,

    PS_PREEMPT,

    PS_TO_MANAGER,

    PS_FROM_MANAGER,

    PS_FROM_DEAD

} pschange_type;

typedef sysarg_t pstid_t;

struct psthread_data {

    link_t link;

    context_t ctx;

    void *stack;

    void *arg;

    int (*func)(void *);

    tcb_t *tcb;

    struct psthread_data *clean_after_me;

    struct psthread_data *joiner;

    int joinee_retval;

    int retval;

    int flags;

};

typedef struct psthread_data psthread_data_t;

extern int context_save(context_t *c);

extern void context_restore(context_t *c) __attribute__ ((noreturn));

pstid_t psthread_create(int (*func)(void *), void *arg);

int psthread_join(pstid_t psthrid);

psthread_data_t * psthread_setup(void);

void psthread_teardown(psthread_data_t *pt);

int psthread_schedule_next_adv(pschange_type ctype);

void psthread_add_ready(pstid_t ptid);

void psthread_add_manager(pstid_t psthrid);

void psthread_remove_manager(void);

pstid_t psthread_get_id(void);

void psthread_inc_sercount(void);

void psthread_dec_sercount(void);

static inline int psthread_schedule_next(void) {

    return psthread_schedule_next_adv(PS_PREEMPT);

}

#endif

/** @}

 */