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/*
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 * Copyright (c) 2001-2004 Jakub Jermar
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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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/** @addtogroup time
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 * @{
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 */
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/** @file
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 */
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#ifndef KERN_TIMEOUT_H_
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#define KERN_TIMEOUT_H_
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#include <arch/types.h>
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#ifdef CONFIG_TIMEOUT_EXTAVL_TREE
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#include <adt/extavl.h>
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#endif
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#include <adt/list.h>
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#include <cpu.h>
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typedef void (* timeout_handler_t)(void *arg);
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#ifdef CONFIG_TIMEOUT_EXTAVL_TREE
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typedef struct {
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    SPINLOCK_DECLARE(lock);
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    /**
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     * Extended AVL tree node structure holds information
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     * about connections with other timeouts.
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     */
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    extavltree_node_t node;
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    /** Function that will be called on timeout activation. */
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    timeout_handler_t handler;
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    /** Argument to be passed to handler() function. */
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    void *arg;
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    /** On which processor is this timeout registered. */
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    cpu_t *cpu;
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} timeout_t;
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#else
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typedef struct {
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    SPINLOCK_DECLARE(lock);
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    /** Link to the list of active timeouts on THE->cpu */
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    link_t link;
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    /** Timeout will be activated in this amount of clock() ticks. */  
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    uint64_t ticks;
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    /** Function that will be called on timeout activation. */
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    timeout_handler_t handler;
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    /** Argument to be passed to handler() function. */
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    void *arg;
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    /** On which processor is this timeout registered. */
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    cpu_t *cpu;
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} timeout_t;
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#endif
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#define us2ticks(us)    ((uint64_t) (((uint32_t) (us) / (1000000 / HZ))))
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extern void timeout_init(void);
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extern void timeout_initialize(timeout_t *t);
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extern void timeout_reinitialize(timeout_t *t);
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extern void timeout_register(timeout_t *t, uint64_t usec, timeout_handler_t f,
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    void *arg);
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extern bool timeout_unregister(timeout_t *t);
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#endif
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/** @}
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 */