Subversion Repositories Kolibri OS

Rev

Go to most recent revision | Blame | Compare with Previous | Last modification | View Log | RSS feed

  1. /*
  2.  * Copyright © 2009 Intel Corporation
  3.  *
  4.  * Permission is hereby granted, free of charge, to any person obtaining a
  5.  * copy of this software and associated documentation files (the "Software"),
  6.  * to deal in the Software without restriction, including without limitation
  7.  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  8.  * and/or sell copies of the Software, and to permit persons to whom the
  9.  * Software is furnished to do so, subject to the following conditions:
  10.  *
  11.  * The above copyright notice and this permission notice (including the next
  12.  * paragraph) shall be included in all copies or substantial portions of the
  13.  * Software.
  14.  *
  15.  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16.  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17.  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18.  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19.  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20.  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21.  * IN THE SOFTWARE.
  22.  *
  23.  * Authors:
  24.  *    Chris Wilson <chris@chris-wilson.co.uk>
  25.  *
  26.  */
  27.  
  28. /**
  29.  * @file xf86atomics.h
  30.  *
  31.  * Private definitions for atomic operations
  32.  */
  33.  
  34. #ifndef LIBDRM_ATOMICS_H
  35. #define LIBDRM_ATOMICS_H
  36.  
  37. #ifdef HAVE_CONFIG_H
  38. #include "config.h"
  39. #endif
  40.  
  41.  
  42. #define HAS_ATOMIC_OPS 1
  43.  
  44. typedef struct {
  45.         int atomic;
  46. } atomic_t;
  47.  
  48. # define atomic_read(x) ((x)->atomic)
  49. # define atomic_set(x, val) ((x)->atomic = (val))
  50. # define atomic_inc(x) ((void) __sync_fetch_and_add (&(x)->atomic, 1))
  51. # define atomic_dec_and_test(x) (__sync_fetch_and_add (&(x)->atomic, -1) == 1)
  52. # define atomic_add(x, v) ((void) __sync_add_and_fetch(&(x)->atomic, (v)))
  53. # define atomic_dec(x, v) ((void) __sync_sub_and_fetch(&(x)->atomic, (v)))
  54. # define atomic_cmpxchg(x, oldv, newv) __sync_val_compare_and_swap (&(x)->atomic, oldv, newv)
  55.  
  56.  
  57. #if HAVE_LIB_ATOMIC_OPS
  58. #include <atomic_ops.h>
  59.  
  60. #define HAS_ATOMIC_OPS 1
  61.  
  62. typedef struct {
  63.         AO_t atomic;
  64. } atomic_t;
  65.  
  66. # define atomic_read(x) AO_load_full(&(x)->atomic)
  67. # define atomic_set(x, val) AO_store_full(&(x)->atomic, (val))
  68. # define atomic_inc(x) ((void) AO_fetch_and_add1_full(&(x)->atomic))
  69. # define atomic_add(x, v) ((void) AO_fetch_and_add_full(&(x)->atomic, (v)))
  70. # define atomic_dec(x, v) ((void) AO_fetch_and_add_full(&(x)->atomic, -(v)))
  71. # define atomic_dec_and_test(x) (AO_fetch_and_sub1_full(&(x)->atomic) == 1)
  72. # define atomic_cmpxchg(x, oldv, newv) AO_compare_and_swap_full(&(x)->atomic, oldv, newv)
  73.  
  74. #endif
  75.  
  76. #if defined(__sun) && !defined(HAS_ATOMIC_OPS)  /* Solaris & OpenSolaris */
  77.  
  78. #include <sys/atomic.h>
  79. #define HAS_ATOMIC_OPS 1
  80.  
  81. typedef struct { uint_t atomic; } atomic_t;
  82.  
  83. # define atomic_read(x) (int) ((x)->atomic)
  84. # define atomic_set(x, val) ((x)->atomic = (uint_t)(val))
  85. # define atomic_inc(x) (atomic_inc_uint (&(x)->atomic))
  86. # define atomic_dec_and_test(x) (atomic_dec_uint_nv(&(x)->atomic) == 1)
  87. # define atomic_add(x, v) (atomic_add_int(&(x)->atomic, (v)))
  88. # define atomic_dec(x, v) (atomic_add_int(&(x)->atomic, -(v)))
  89. # define atomic_cmpxchg(x, oldv, newv) atomic_cas_uint (&(x)->atomic, oldv, newv)
  90.  
  91. #endif
  92.  
  93. #if ! HAS_ATOMIC_OPS
  94. #error libdrm requires atomic operations, please define them for your CPU/compiler.
  95. #endif
  96.  
  97. #endif
  98.