Mercurial > hg > nginx
annotate src/os/unix/ngx_atomic.h @ 3363:b4aa418af6ef
libatomic_ops support
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 25 Nov 2009 17:55:25 +0000 |
parents | b57a4a704f3c |
children | 5d17022a1e88 |
rev | line source |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
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4 */ |
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7 #ifndef _NGX_ATOMIC_H_INCLUDED_ |
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8 #define _NGX_ATOMIC_H_INCLUDED_ |
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11 #include <ngx_config.h> |
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12 #include <ngx_core.h> |
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14 |
3363 | 15 #if (NGX_HAVE_LIBATOMIC) |
16 | |
17 #include <atomic_ops.h> | |
18 | |
19 #define NGX_HAVE_ATOMIC_OPS 1 | |
20 | |
21 typedef long ngx_atomic_int_t; | |
22 typedef AO_t ngx_atomic_uint_t; | |
23 typedef volatile ngx_atomic_uint_t ngx_atomic_t; | |
24 | |
25 #if (NGX_PTR_SIZE == 8) | |
26 #define NGX_ATOMIC_T_LEN (sizeof("-9223372036854775808") - 1) | |
27 #else | |
28 #define NGX_ATOMIC_T_LEN (sizeof("-2147483648") - 1) | |
29 #endif | |
30 | |
31 #define ngx_atomic_cmp_set(lock, old, new) \ | |
32 AO_compare_and_swap(lock, old, new) | |
33 #define ngx_atomic_fetch_add(value, add) \ | |
34 AO_fetch_and_add(value, add) | |
35 #define ngx_memory_barrier() AO_nop() | |
36 #define ngx_cpu_pause() | |
37 | |
38 | |
39 #elif (NGX_DARWIN_ATOMIC) | |
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40 |
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41 /* |
940 | 42 * use Darwin 8 atomic(3) and barrier(3) operations |
43 * optimized at run-time for UP and SMP | |
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44 */ |
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45 |
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46 #include <libkern/OSAtomic.h> |
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47 |
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48 /* "bool" conflicts with perl's CORE/handy.h */ |
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49 #undef bool |
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50 |
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51 |
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52 #define NGX_HAVE_ATOMIC_OPS 1 |
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53 |
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54 #if (NGX_PTR_SIZE == 8) |
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55 |
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56 typedef int64_t ngx_atomic_int_t; |
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57 typedef uint64_t ngx_atomic_uint_t; |
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58 #define NGX_ATOMIC_T_LEN (sizeof("-9223372036854775808") - 1) |
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59 |
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60 #define ngx_atomic_cmp_set(lock, old, new) \ |
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61 OSAtomicCompareAndSwap64Barrier(old, new, (int64_t *) lock) |
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62 |
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63 #define ngx_atomic_fetch_add(value, add) \ |
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64 (OSAtomicAdd64(add, (int64_t *) value) - add) |
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65 |
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66 #else |
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67 |
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68 typedef int32_t ngx_atomic_int_t; |
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69 typedef uint32_t ngx_atomic_uint_t; |
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70 #define NGX_ATOMIC_T_LEN (sizeof("-2147483648") - 1) |
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71 |
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72 #define ngx_atomic_cmp_set(lock, old, new) \ |
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73 OSAtomicCompareAndSwap32Barrier(old, new, (int32_t *) lock) |
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74 |
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75 #define ngx_atomic_fetch_add(value, add) \ |
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76 (OSAtomicAdd32(add, (int32_t *) value) - add) |
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77 |
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78 #endif |
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79 |
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80 #define ngx_memory_barrier() OSMemoryBarrier() |
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81 |
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82 #define ngx_cpu_pause() |
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83 |
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84 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
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85 |
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86 |
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87 #elif (NGX_HAVE_GCC_ATOMIC) |
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88 |
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89 /* GCC 4.1 builtin atomic operations */ |
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90 |
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91 #define NGX_HAVE_ATOMIC_OPS 1 |
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92 |
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93 typedef long ngx_atomic_int_t; |
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94 typedef unsigned long ngx_atomic_uint_t; |
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95 |
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96 #if (NGX_PTR_SIZE == 8) |
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97 #define NGX_ATOMIC_T_LEN (sizeof("-9223372036854775808") - 1) |
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98 #else |
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99 #define NGX_ATOMIC_T_LEN (sizeof("-2147483648") - 1) |
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100 #endif |
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101 |
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102 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
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103 |
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104 |
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105 #define ngx_atomic_cmp_set(lock, old, set) \ |
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106 __sync_bool_compare_and_swap(lock, old, set) |
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107 |
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108 #define ngx_atomic_fetch_add(value, add) \ |
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109 __sync_fetch_and_add(value, add) |
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110 |
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111 #define ngx_memory_barrier() __sync_synchronize() |
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112 |
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113 #if ( __i386__ || __i386 || __amd64__ || __amd64 ) |
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114 #define ngx_cpu_pause() __asm__ ("pause") |
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115 #else |
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116 #define ngx_cpu_pause() |
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117 #endif |
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118 |
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119 |
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120 #elif ( __i386__ || __i386 ) |
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121 |
561 | 122 typedef int32_t ngx_atomic_int_t; |
123 typedef uint32_t ngx_atomic_uint_t; | |
495 | 124 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
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125 #define NGX_ATOMIC_T_LEN (sizeof("-2147483648") - 1) |
493 | 126 |
127 | |
561 | 128 #if ( __SUNPRO_C ) |
493 | 129 |
561 | 130 #define NGX_HAVE_ATOMIC_OPS 1 |
493 | 131 |
561 | 132 ngx_atomic_uint_t |
133 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
134 ngx_atomic_uint_t set); | |
493 | 135 |
561 | 136 ngx_atomic_int_t |
137 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add); | |
493 | 138 |
1309 | 139 /* |
140 * Sun Studio 12 exits with segmentation fault on '__asm ("pause")', | |
141 * so ngx_cpu_pause is declared in src/os/unix/ngx_sunpro_x86.il | |
142 */ | |
143 | |
144 void | |
145 ngx_cpu_pause(void); | |
146 | |
561 | 147 /* the code in src/os/unix/ngx_sunpro_x86.il */ |
493 | 148 |
563 | 149 #define ngx_memory_barrier() __asm (".volatile"); __asm (".nonvolatile") |
150 | |
493 | 151 |
561 | 152 #else /* ( __GNUC__ || __INTEL_COMPILER ) */ |
153 | |
154 #define NGX_HAVE_ATOMIC_OPS 1 | |
493 | 155 |
561 | 156 #include "ngx_gcc_atomic_x86.h" |
493 | 157 |
561 | 158 #endif |
493 | 159 |
160 | |
547 | 161 #elif ( __amd64__ || __amd64 ) |
493 | 162 |
561 | 163 typedef int64_t ngx_atomic_int_t; |
164 typedef uint64_t ngx_atomic_uint_t; | |
495 | 165 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
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166 #define NGX_ATOMIC_T_LEN (sizeof("-9223372036854775808") - 1) |
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167 |
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168 |
561 | 169 #if ( __SUNPRO_C ) |
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170 |
561 | 171 #define NGX_HAVE_ATOMIC_OPS 1 |
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172 |
561 | 173 ngx_atomic_uint_t |
174 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
175 ngx_atomic_uint_t set); | |
266
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176 |
561 | 177 ngx_atomic_int_t |
178 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add); | |
266
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179 |
1309 | 180 /* |
181 * Sun Studio 12 exits with segmentation fault on '__asm ("pause")', | |
182 * so ngx_cpu_pause is declared in src/os/unix/ngx_sunpro_amd64.il | |
183 */ | |
184 | |
185 void | |
186 ngx_cpu_pause(void); | |
187 | |
561 | 188 /* the code in src/os/unix/ngx_sunpro_amd64.il */ |
266
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189 |
563 | 190 #define ngx_memory_barrier() __asm (".volatile"); __asm (".nonvolatile") |
191 | |
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192 |
561 | 193 #else /* ( __GNUC__ || __INTEL_COMPILER ) */ |
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194 |
561 | 195 #define NGX_HAVE_ATOMIC_OPS 1 |
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196 |
561 | 197 #include "ngx_gcc_atomic_amd64.h" |
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198 |
561 | 199 #endif |
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200 |
301
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201 |
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202 #elif ( __sparc__ || __sparc || __sparcv9 ) |
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203 |
561 | 204 #if (NGX_PTR_SIZE == 8) |
205 | |
206 typedef int64_t ngx_atomic_int_t; | |
207 typedef uint64_t ngx_atomic_uint_t; | |
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208 #define NGX_ATOMIC_T_LEN (sizeof("-9223372036854775808") - 1) |
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209 |
493 | 210 #else |
561 | 211 |
212 typedef int32_t ngx_atomic_int_t; | |
213 typedef uint32_t ngx_atomic_uint_t; | |
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214 #define NGX_ATOMIC_T_LEN (sizeof("-2147483648") - 1) |
561 | 215 |
493 | 216 #endif |
217 | |
495 | 218 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
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219 |
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220 |
561 | 221 #if ( __SUNPRO_C ) |
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222 |
561 | 223 #define NGX_HAVE_ATOMIC_OPS 1 |
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224 |
561 | 225 #include "ngx_sunpro_atomic_sparc64.h" |
493 | 226 |
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227 |
561 | 228 #else /* ( __GNUC__ || __INTEL_COMPILER ) */ |
493 | 229 |
561 | 230 #define NGX_HAVE_ATOMIC_OPS 1 |
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231 |
561 | 232 #include "ngx_gcc_atomic_sparc64.h" |
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233 |
561 | 234 #endif |
493 | 235 |
236 | |
613 | 237 #elif ( __powerpc__ || __POWERPC__ ) |
493 | 238 |
239 #define NGX_HAVE_ATOMIC_OPS 1 | |
240 | |
241 #if (NGX_PTR_SIZE == 8) | |
561 | 242 |
243 typedef int64_t ngx_atomic_int_t; | |
244 typedef uint64_t ngx_atomic_uint_t; | |
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245 #define NGX_ATOMIC_T_LEN (sizeof("-9223372036854775808") - 1) |
561 | 246 |
493 | 247 #else |
561 | 248 |
249 typedef int32_t ngx_atomic_int_t; | |
250 typedef uint32_t ngx_atomic_uint_t; | |
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251 #define NGX_ATOMIC_T_LEN (sizeof("-2147483648") - 1) |
561 | 252 |
493 | 253 #endif |
254 | |
495 | 255 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
493 | 256 |
257 | |
561 | 258 #include "ngx_gcc_atomic_ppc.h" |
493 | 259 |
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260 #endif |
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261 |
493 | 262 |
561 | 263 #if !(NGX_HAVE_ATOMIC_OPS) |
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264 |
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265 #define NGX_HAVE_ATOMIC_OPS 0 |
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266 |
561 | 267 typedef int32_t ngx_atomic_int_t; |
268 typedef uint32_t ngx_atomic_uint_t; | |
495 | 269 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
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270 #define NGX_ATOMIC_T_LEN (sizeof("-2147483648") - 1) |
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271 |
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272 |
495 | 273 static ngx_inline ngx_atomic_uint_t |
274 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
275 ngx_atomic_uint_t set) | |
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276 { |
571 | 277 if (*lock == old) { |
561 | 278 *lock = set; |
279 return 1; | |
280 } | |
281 | |
282 return 0; | |
283 } | |
284 | |
285 | |
286 static ngx_inline ngx_atomic_int_t | |
287 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add) | |
288 { | |
289 ngx_atomic_int_t old; | |
290 | |
291 old = *value; | |
292 *value += add; | |
293 | |
294 return old; | |
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295 } |
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296 |
571 | 297 #define ngx_memory_barrier() |
611 | 298 #define ngx_cpu_pause() |
571 | 299 |
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300 #endif |
212
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301 |
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302 |
611 | 303 void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin); |
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304 |
371
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305 #define ngx_trylock(lock) (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1)) |
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306 #define ngx_unlock(lock) *(lock) = 0 |
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307 |
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308 |
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309 #endif /* _NGX_ATOMIC_H_INCLUDED_ */ |