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  1. /*
  2.  * Copyright (c) 2009 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 libc
  30.  * @{
  31.  */
  32. /** @file
  33.  */
  34.  
  35. #ifndef LIBC_FIBRIL_SYNC_H_
  36. #define LIBC_FIBRIL_SYNC_H_
  37.  
  38. #include <async.h>
  39. #include <fibril.h>
  40. #include <adt/list.h>
  41. #include <libarch/tls.h>
  42.  
  43. typedef struct {
  44.     int counter;
  45.     link_t waiters;
  46. } fibril_mutex_t;
  47.  
  48. #define FIBRIL_MUTEX_INITIALIZE(name) \
  49.     fibril_mutex_t name = { \
  50.         .counter = 1, \
  51.         .waiters = { \
  52.             .prev = &name.waiters, \
  53.             .next = &name.waiters, \
  54.         } \
  55.     }
  56.  
  57. typedef struct {
  58.     unsigned writers;
  59.     unsigned readers;
  60.     link_t waiters;
  61. } fibril_rwlock_t;
  62.  
  63. #define FIBRIL_RWLOCK_INITIALIZE(name) \
  64.     fibril_rwlock_t name = { \
  65.         .readers = 0, \
  66.         .writers = 0, \
  67.         .waiters = { \
  68.             .prev = &name.waiters, \
  69.             .next = &name.waiters, \
  70.         } \
  71.     }
  72.  
  73. extern void fibril_mutex_initialize(fibril_mutex_t *);
  74. extern void fibril_mutex_lock(fibril_mutex_t *);
  75. extern bool fibril_mutex_trylock(fibril_mutex_t *);
  76. extern void fibril_mutex_unlock(fibril_mutex_t *);
  77.  
  78. extern void fibril_rwlock_initialize(fibril_rwlock_t *);
  79. extern void fibril_rwlock_read_lock(fibril_rwlock_t *);
  80. extern void fibril_rwlock_write_lock(fibril_rwlock_t *);
  81. extern void fibril_rwlock_read_unlock(fibril_rwlock_t *);
  82. extern void fibril_rwlock_write_unlock(fibril_rwlock_t *);
  83.  
  84. #endif
  85.  
  86. /** @}
  87.  */
  88.