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  1. /*
  2.  * Copyright (C) 2001-2004 Jakub Jermar
  3.  * All rights reserved.
  4.  *
  5.  * Redistribution and use in source and binary forms, with or without
  6.  * modification, are permitted provided that the following conditions
  7.  * are met:
  8.  *
  9.  * - Redistributions of source code must retain the above copyright
  10.  *   notice, this list of conditions and the following disclaimer.
  11.  * - Redistributions in binary form must reproduce the above copyright
  12.  *   notice, this list of conditions and the following disclaimer in the
  13.  *   documentation and/or other materials provided with the distribution.
  14.  * - The name of the author may not be used to endorse or promote products
  15.  *   derived from this software without specific prior written permission.
  16.  *
  17.  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18.  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19.  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20.  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21.  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22.  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23.  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24.  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25.  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26.  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27.  */
  28.  
  29. /** @addtogroup time
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef KERN_TIMEOUT_H_
  36. #define KERN_TIMEOUT_H_
  37.  
  38. #include <arch/types.h>
  39. #include <typedefs.h>
  40. #include <synch/spinlock.h>
  41. #include <adt/list.h>
  42.  
  43. #define us2ticks(us)    ((uint64_t)(((uint32_t) (us)/(1000000/HZ))))
  44.  
  45. typedef void (* timeout_handler_t)(void *arg);
  46.  
  47. struct timeout {
  48.     SPINLOCK_DECLARE(lock);
  49.  
  50.     link_t link;            /**< Link to the list of active timeouts on THE->cpu */
  51.    
  52.     uint64_t ticks;         /**< Timeout will be activated in this amount of clock() ticks. */
  53.  
  54.     timeout_handler_t handler;  /**< Function that will be called on timeout activation. */
  55.     void *arg;          /**< Argument to be passed to handler() function. */
  56.    
  57.     cpu_t *cpu;         /**< On which processor is this timeout registered. */
  58. };
  59.  
  60. extern void timeout_init(void);
  61. extern void timeout_initialize(timeout_t *t);
  62. extern void timeout_reinitialize(timeout_t *t);
  63. extern void timeout_register(timeout_t *t, uint64_t usec, timeout_handler_t f, void *arg);
  64. extern bool timeout_unregister(timeout_t *t);
  65.  
  66. #endif
  67.  
  68. /** @}
  69.  */
  70.