Mercurial > hg > nginx
annotate src/os/unix/ngx_atomic.h @ 2556:8ec97ff12a0a
fix segfaults introduced in r2549 and r2550
author | Igor Sysoev <igor@sysoev.ru> |
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date | Wed, 11 Mar 2009 13:04:02 +0000 |
parents | c505e2712e13 |
children | 7658e9c7e814 |
rev | line source |
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1 |
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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 |
940 | 15 #if (NGX_DARWIN_ATOMIC) |
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16 |
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17 /* |
940 | 18 * use Darwin 8 atomic(3) and barrier(3) operations |
19 * optimized at run-time for UP and SMP | |
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20 */ |
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21 |
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22 #include <libkern/OSAtomic.h> |
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23 |
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24 /* "bool" conflicts with perl's CORE/handy.h */ |
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25 #undef bool |
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26 |
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27 |
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28 #define NGX_HAVE_ATOMIC_OPS 1 |
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29 |
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30 #if (NGX_PTR_SIZE == 8) |
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31 |
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32 typedef int64_t ngx_atomic_int_t; |
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33 typedef uint64_t ngx_atomic_uint_t; |
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34 #define NGX_ATOMIC_T_LEN sizeof("-9223372036854775808") - 1 |
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35 |
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36 #define ngx_atomic_cmp_set(lock, old, new) \ |
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37 OSAtomicCompareAndSwap64Barrier(old, new, (int64_t *) lock) |
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38 |
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39 #define ngx_atomic_fetch_add(value, add) \ |
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40 (OSAtomicAdd64(add, (int64_t *) value) - add) |
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41 |
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42 #else |
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43 |
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44 typedef int32_t ngx_atomic_int_t; |
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45 typedef uint32_t ngx_atomic_uint_t; |
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46 #define NGX_ATOMIC_T_LEN sizeof("-2147483648") - 1 |
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47 |
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48 #define ngx_atomic_cmp_set(lock, old, new) \ |
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49 OSAtomicCompareAndSwap32Barrier(old, new, (int32_t *) lock) |
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50 |
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51 #define ngx_atomic_fetch_add(value, add) \ |
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52 (OSAtomicAdd32(add, (int32_t *) value) - add) |
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53 |
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54 #endif |
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55 |
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56 #define ngx_memory_barrier() OSMemoryBarrier() |
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57 |
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58 #define ngx_cpu_pause() |
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59 |
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60 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
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61 |
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62 |
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63 #else /* !(NGX_DARWIN) */ |
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64 |
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65 |
547 | 66 #if ( __i386__ || __i386 ) |
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67 |
561 | 68 typedef int32_t ngx_atomic_int_t; |
69 typedef uint32_t ngx_atomic_uint_t; | |
495 | 70 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
561 | 71 #define NGX_ATOMIC_T_LEN sizeof("-2147483648") - 1 |
493 | 72 |
73 | |
561 | 74 #if ( __SUNPRO_C ) |
493 | 75 |
561 | 76 #define NGX_HAVE_ATOMIC_OPS 1 |
493 | 77 |
561 | 78 ngx_atomic_uint_t |
79 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
80 ngx_atomic_uint_t set); | |
493 | 81 |
561 | 82 ngx_atomic_int_t |
83 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add); | |
493 | 84 |
1309 | 85 /* |
86 * Sun Studio 12 exits with segmentation fault on '__asm ("pause")', | |
87 * so ngx_cpu_pause is declared in src/os/unix/ngx_sunpro_x86.il | |
88 */ | |
89 | |
90 void | |
91 ngx_cpu_pause(void); | |
92 | |
561 | 93 /* the code in src/os/unix/ngx_sunpro_x86.il */ |
493 | 94 |
563 | 95 #define ngx_memory_barrier() __asm (".volatile"); __asm (".nonvolatile") |
96 | |
493 | 97 |
561 | 98 #else /* ( __GNUC__ || __INTEL_COMPILER ) */ |
99 | |
100 #define NGX_HAVE_ATOMIC_OPS 1 | |
493 | 101 |
561 | 102 #include "ngx_gcc_atomic_x86.h" |
493 | 103 |
561 | 104 #endif |
493 | 105 |
106 | |
547 | 107 #elif ( __amd64__ || __amd64 ) |
493 | 108 |
561 | 109 typedef int64_t ngx_atomic_int_t; |
110 typedef uint64_t ngx_atomic_uint_t; | |
495 | 111 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
561 | 112 #define NGX_ATOMIC_T_LEN sizeof("-9223372036854775808") - 1 |
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113 |
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114 |
561 | 115 #if ( __SUNPRO_C ) |
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116 |
561 | 117 #define NGX_HAVE_ATOMIC_OPS 1 |
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118 |
561 | 119 ngx_atomic_uint_t |
120 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
121 ngx_atomic_uint_t set); | |
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122 |
561 | 123 ngx_atomic_int_t |
124 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add); | |
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125 |
1309 | 126 /* |
127 * Sun Studio 12 exits with segmentation fault on '__asm ("pause")', | |
128 * so ngx_cpu_pause is declared in src/os/unix/ngx_sunpro_amd64.il | |
129 */ | |
130 | |
131 void | |
132 ngx_cpu_pause(void); | |
133 | |
561 | 134 /* the code in src/os/unix/ngx_sunpro_amd64.il */ |
266
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135 |
563 | 136 #define ngx_memory_barrier() __asm (".volatile"); __asm (".nonvolatile") |
137 | |
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138 |
561 | 139 #else /* ( __GNUC__ || __INTEL_COMPILER ) */ |
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140 |
561 | 141 #define NGX_HAVE_ATOMIC_OPS 1 |
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142 |
561 | 143 #include "ngx_gcc_atomic_amd64.h" |
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144 |
561 | 145 #endif |
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147 |
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148 #elif ( __sparc__ || __sparc || __sparcv9 ) |
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149 |
561 | 150 #if (NGX_PTR_SIZE == 8) |
151 | |
152 typedef int64_t ngx_atomic_int_t; | |
153 typedef uint64_t ngx_atomic_uint_t; | |
154 #define NGX_ATOMIC_T_LEN sizeof("-9223372036854775808") - 1 | |
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155 |
493 | 156 #else |
561 | 157 |
158 typedef int32_t ngx_atomic_int_t; | |
159 typedef uint32_t ngx_atomic_uint_t; | |
160 #define NGX_ATOMIC_T_LEN sizeof("-2147483648") - 1 | |
161 | |
493 | 162 #endif |
163 | |
495 | 164 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
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165 |
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166 |
561 | 167 #if ( __SUNPRO_C ) |
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168 |
561 | 169 #define NGX_HAVE_ATOMIC_OPS 1 |
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170 |
561 | 171 #include "ngx_sunpro_atomic_sparc64.h" |
493 | 172 |
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173 |
561 | 174 #else /* ( __GNUC__ || __INTEL_COMPILER ) */ |
493 | 175 |
561 | 176 #define NGX_HAVE_ATOMIC_OPS 1 |
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177 |
561 | 178 #include "ngx_gcc_atomic_sparc64.h" |
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179 |
561 | 180 #endif |
493 | 181 |
182 | |
613 | 183 #elif ( __powerpc__ || __POWERPC__ ) |
493 | 184 |
185 #define NGX_HAVE_ATOMIC_OPS 1 | |
186 | |
187 #if (NGX_PTR_SIZE == 8) | |
561 | 188 |
189 typedef int64_t ngx_atomic_int_t; | |
190 typedef uint64_t ngx_atomic_uint_t; | |
191 #define NGX_ATOMIC_T_LEN sizeof("-9223372036854775808") - 1 | |
192 | |
493 | 193 #else |
561 | 194 |
195 typedef int32_t ngx_atomic_int_t; | |
196 typedef uint32_t ngx_atomic_uint_t; | |
197 #define NGX_ATOMIC_T_LEN sizeof("-2147483648") - 1 | |
198 | |
493 | 199 #endif |
200 | |
495 | 201 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
493 | 202 |
203 | |
561 | 204 #include "ngx_gcc_atomic_ppc.h" |
493 | 205 |
206 | |
561 | 207 #endif |
493 | 208 |
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209 #endif |
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210 |
493 | 211 |
561 | 212 #if !(NGX_HAVE_ATOMIC_OPS) |
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213 |
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214 #define NGX_HAVE_ATOMIC_OPS 0 |
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215 |
561 | 216 typedef int32_t ngx_atomic_int_t; |
217 typedef uint32_t ngx_atomic_uint_t; | |
495 | 218 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
561 | 219 #define NGX_ATOMIC_T_LEN sizeof("-2147483648") - 1 |
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220 |
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221 |
495 | 222 static ngx_inline ngx_atomic_uint_t |
223 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
224 ngx_atomic_uint_t set) | |
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225 { |
571 | 226 if (*lock == old) { |
561 | 227 *lock = set; |
228 return 1; | |
229 } | |
230 | |
231 return 0; | |
232 } | |
233 | |
234 | |
235 static ngx_inline ngx_atomic_int_t | |
236 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add) | |
237 { | |
238 ngx_atomic_int_t old; | |
239 | |
240 old = *value; | |
241 *value += add; | |
242 | |
243 return old; | |
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244 } |
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245 |
571 | 246 #define ngx_memory_barrier() |
611 | 247 #define ngx_cpu_pause() |
571 | 248 |
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249 #endif |
212
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250 |
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251 |
611 | 252 void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin); |
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253 |
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254 #define ngx_trylock(lock) (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1)) |
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255 #define ngx_unlock(lock) *(lock) = 0 |
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256 |
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257 |
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258 #endif /* _NGX_ATOMIC_H_INCLUDED_ */ |