Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_atomic.h @ 444:42d11f017717
nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 29 Sep 2004 16:00:49 +0000 |
parents | da8c5707af39 |
children | 975f62e77f02 |
rev | line source |
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1 |
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2 /* |
444
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3 * Copyright (C) Igor Sysoev |
441
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4 */ |
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5 |
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7 #ifndef _NGX_ATOMIC_H_INCLUDED_ |
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8 #define _NGX_ATOMIC_H_INCLUDED_ |
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9 |
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11 #include <ngx_config.h> |
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12 #include <ngx_core.h> |
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15 #if ( __i386__ || __amd64__ ) |
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17 #define NGX_HAVE_ATOMIC_OPS 1 |
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19 typedef volatile uint32_t ngx_atomic_t; |
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20 |
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21 #if (NGX_SMP) |
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22 #define NGX_SMP_LOCK "lock;" |
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23 #else |
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24 #define NGX_SMP_LOCK |
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25 #endif |
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26 |
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27 |
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28 static ngx_inline uint32_t ngx_atomic_inc(ngx_atomic_t *value) |
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29 { |
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30 uint32_t old; |
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31 |
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32 __asm__ volatile ( |
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34 NGX_SMP_LOCK |
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35 " xaddl %0, %2; " |
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36 " incl %0; " |
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37 |
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38 : "=q" (old) : "0" (1), "m" (*value)); |
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39 |
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40 return old; |
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41 } |
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42 |
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43 |
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44 #if 0 |
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45 |
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46 static ngx_inline uint32_t ngx_atomic_dec(ngx_atomic_t *value) |
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47 { |
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48 uint32_t old; |
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49 |
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50 __asm__ volatile ( |
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51 |
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52 NGX_SMP_LOCK |
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53 " xaddl %0, %1; " |
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54 " decl %0; " |
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55 |
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56 : "=q" (old) : "0" (-1), "m" (*value)); |
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57 |
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58 return old; |
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59 } |
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60 |
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61 #endif |
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62 |
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63 |
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64 static ngx_inline uint32_t ngx_atomic_cmp_set(ngx_atomic_t *lock, |
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65 ngx_atomic_t old, |
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66 ngx_atomic_t set) |
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67 { |
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68 uint32_t res; |
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69 |
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70 __asm__ volatile ( |
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71 |
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72 NGX_SMP_LOCK |
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73 " cmpxchgl %3, %1; " |
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74 " setz %%al; " |
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75 " movzbl %%al, %0; " |
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76 |
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77 : "=a" (res) : "m" (*lock), "a" (old), "q" (set)); |
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78 |
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79 return res; |
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80 } |
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81 |
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82 |
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83 #elif ( __sparc__ ) |
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84 |
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85 #define NGX_HAVE_ATOMIC_OPS 1 |
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86 |
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87 typedef volatile uint32_t ngx_atomic_t; |
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88 |
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89 |
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90 static ngx_inline uint32_t ngx_atomic_inc(ngx_atomic_t *value) |
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91 { |
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92 uint32_t old, new, res; |
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93 |
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94 old = *value; |
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95 |
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96 for ( ;; ) { |
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97 |
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98 new = old + 1; |
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99 res = new; |
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100 |
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101 __asm__ volatile ( |
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102 |
433
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103 "casa [%1] 0x80, %2, %0" |
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104 |
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373
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105 : "+r" (res) : "r" (value), "r" (old)); |
bd39260a1383
nginx-0.0.10-2004-09-14-19:55:24 import
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106 |
bd39260a1383
nginx-0.0.10-2004-09-14-19:55:24 import
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107 if (res == old) { |
bd39260a1383
nginx-0.0.10-2004-09-14-19:55:24 import
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108 return new; |
bd39260a1383
nginx-0.0.10-2004-09-14-19:55:24 import
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109 } |
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nginx-0.0.10-2004-09-14-19:55:24 import
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110 |
bd39260a1383
nginx-0.0.10-2004-09-14-19:55:24 import
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111 old = res; |
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nginx-0.0.10-2004-09-14-19:55:24 import
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112 } |
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nginx-0.0.10-2004-09-14-19:55:24 import
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113 } |
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nginx-0.0.10-2004-09-14-19:55:24 import
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114 |
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nginx-0.0.10-2004-09-14-19:55:24 import
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115 |
bd39260a1383
nginx-0.0.10-2004-09-14-19:55:24 import
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116 static ngx_inline uint32_t ngx_atomic_cmp_set(ngx_atomic_t *lock, |
bd39260a1383
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117 ngx_atomic_t old, |
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118 ngx_atomic_t set) |
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nginx-0.0.10-2004-09-14-19:55:24 import
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119 { |
428
5e73d0ea4dab
nginx-0.0.11-2004-09-16-20:10:13 import
Igor Sysoev <igor@sysoev.ru>
parents:
425
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120 uint32_t res = (uint32_t) set; |
425
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121 |
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122 __asm__ volatile ( |
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nginx-0.0.10-2004-09-14-19:55:24 import
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123 |
433
9a97dcdd2421
nginx-0.0.11-2004-09-21-19:47:05 import
Igor Sysoev <igor@sysoev.ru>
parents:
428
diff
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124 "casa [%1] 0x80, %2, %0" |
425
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nginx-0.0.10-2004-09-14-19:55:24 import
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125 |
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126 : "+r" (res) : "r" (lock), "r" (old)); |
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127 |
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128 return (res == old); |
bd39260a1383
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129 } |
bd39260a1383
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130 |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
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131 #else |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
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213
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132 |
435
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
433
diff
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133 #define NGX_HAVE_ATOMIC_OPS 0 |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
433
diff
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134 |
267
83205e0b5522
nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents:
266
diff
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135 typedef volatile uint32_t ngx_atomic_t; |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
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136 |
435
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
433
diff
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137 #define ngx_atomic_inc(x) ++(*(x)); |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
433
diff
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|
138 |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
433
diff
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139 static ngx_inline uint32_t ngx_atomic_cmp_set(ngx_atomic_t *lock, |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
433
diff
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140 ngx_atomic_t old, |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
433
diff
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141 ngx_atomic_t set) |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
433
diff
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142 { |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
433
diff
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143 return 1; |
5cdc4838d4e8
nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents:
433
diff
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|
144 } |
266
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
diff
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|
145 |
5238e93961a1
nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents:
213
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146 #endif |
212
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
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|
147 |
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
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|
148 |
373
018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
371
diff
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|
149 void ngx_spinlock(ngx_atomic_t *lock, ngx_uint_t spin); |
018569a8f09c
nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents:
371
diff
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|
150 |
371
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
370
diff
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151 #define ngx_trylock(lock) (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1)) |
780e93985b93
nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents:
370
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152 #define ngx_unlock(lock) *(lock) = 0 |
370
54f76b0b8dca
nginx-0.0.7-2004-06-27-22:01:57 import
Igor Sysoev <igor@sysoev.ru>
parents:
302
diff
changeset
|
153 |
54f76b0b8dca
nginx-0.0.7-2004-06-27-22:01:57 import
Igor Sysoev <igor@sysoev.ru>
parents:
302
diff
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|
154 |
212
679f60139863
nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
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155 #endif /* _NGX_ATOMIC_H_INCLUDED_ */ |