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/*
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 * Copyright (C) 2006 Ondrej Palkovsky
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 * All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 * - Redistributions of source code must retain the above copyright
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 *   notice, this list of conditions and the following disclaimer.
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 * - Redistributions in binary form must reproduce the above copyright
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 *   notice, this list of conditions and the following disclaimer in the
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 *   documentation and/or other materials provided with the distribution.
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 * - The name of the author may not be used to endorse or promote products
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 *   derived from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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#ifndef __LIBC__PSTHREAD_H__
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#define __LIBC__PSTHREAD_H__
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#include <libarch/psthread.h>
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#include <libadt/list.h>
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#include <libarch/thread.h>
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#ifndef context_set
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#define context_set(c, _pc, stack, size, ptls)          \
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    (c)->pc = (sysarg_t) (_pc);             \
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    (c)->sp = ((sysarg_t) (stack)) + (size) - SP_DELTA;     \
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        (c)->tls = (sysarg_t) (ptls);
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#endif /* context_set */
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typedef enum {
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    PS_TO_MANAGER,
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    PS_FROM_MANAGER,
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    PS_PREEMPT
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} pschange_type;
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typedef sysarg_t pstid_t;
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struct psthread_data {
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    link_t link;
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    context_t ctx;
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    void *stack;
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    void *arg;
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    int (*func)(void *);
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    tcb_t *tcb;
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    struct psthread_data *waiter;
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    int finished;
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    int retval;
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    int flags;
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};
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typedef struct psthread_data psthread_data_t;
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extern int context_save(context_t *c);
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extern void context_restore(context_t *c) __attribute__ ((noreturn));
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pstid_t psthread_create(int (*func)(void *), void *arg);
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int psthread_join(pstid_t psthrid);
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psthread_data_t * psthread_setup(void);
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void psthread_teardown(psthread_data_t *pt);
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int psthread_schedule_next_adv(pschange_type ctype);
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void psthread_add_ready(pstid_t ptid);
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void psthread_add_manager(pstid_t psthrid);
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void psthread_remove_manager(void);
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static inline int psthread_schedule_next() {
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    return psthread_schedule_next_adv(PS_PREEMPT);
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}
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#endif