Subversion Repositories HelenOS

/*

 * 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_FIBRIL_H_

#define LIBC_FIBRIL_H_

#include <libarch/fibril.h>

#include <adt/list.h>

#include <libarch/tls.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 FIBRIL_SERIALIZED   1

#define FIBRIL_WRITER       2

typedef enum {

    FIBRIL_PREEMPT,

    FIBRIL_TO_MANAGER,

    FIBRIL_FROM_MANAGER,

    FIBRIL_FROM_DEAD

} fibril_switch_type_t;

typedef sysarg_t fid_t;

struct fibril {

    link_t link;

    context_t ctx;

    void *stack;

    void *arg;

    int (*func)(void *);

    tcb_t *tcb;

    struct fibril *clean_after_me;

    int retval;

    int flags;

};

typedef struct fibril fibril_t;

/** Fibril-local variable specifier */

#define fibril_local __thread

extern int context_save(context_t *c) __attribute__ ((returns_twice));

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

extern fid_t fibril_create(int (*func)(void *), void *arg);

extern fibril_t *fibril_setup(void);

extern void fibril_teardown(fibril_t *f);

extern int fibril_switch(fibril_switch_type_t stype);

extern void fibril_add_ready(fid_t fid);

extern void fibril_add_manager(fid_t fid);

extern void fibril_remove_manager(void);

extern fid_t fibril_get_id(void);

extern void fibril_inc_sercount(void);

extern void fibril_dec_sercount(void);

static inline int fibril_yield(void) {

    return fibril_switch(FIBRIL_PREEMPT);

}

#endif

/** @}

 */