Mercurial > hg > nginx-quic
annotate src/os/unix/ngx_atomic.h @ 1078:6f476df0d39f
release-0.5.9 tag
author | Igor Sysoev <igor@sysoev.ru> |
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date | Thu, 25 Jan 2007 16:34:52 +0000 |
parents | ca9fe5ae412b |
children | 63fa39cf8bd0 b766d9c0a2be |
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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10 |
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11 #include <ngx_config.h> |
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12 #include <ngx_core.h> |
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940 | 15 #if (NGX_DARWIN_ATOMIC) |
939
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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 | |
939
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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 * "true" and "false" conflict with nginx, and of course we can rename them, |
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26 * but we need to undef "bool" anyway |
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27 */ |
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28 #undef bool |
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29 #undef true |
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30 #undef false |
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31 |
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32 |
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33 #define NGX_HAVE_ATOMIC_OPS 1 |
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34 |
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35 #if (NGX_PTR_SIZE == 8) |
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36 |
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37 typedef int64_t ngx_atomic_int_t; |
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38 typedef uint64_t ngx_atomic_uint_t; |
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39 #define NGX_ATOMIC_T_LEN sizeof("-9223372036854775808") - 1 |
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40 |
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41 #define ngx_atomic_cmp_set(lock, old, new) \ |
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42 OSAtomicCompareAndSwap64Barrier(old, new, (int64_t *) lock) |
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43 |
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44 #define ngx_atomic_fetch_add(value, add) \ |
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45 (OSAtomicAdd64(add, (int64_t *) value) - add) |
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46 |
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47 #else |
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48 |
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49 typedef int32_t ngx_atomic_int_t; |
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50 typedef uint32_t ngx_atomic_uint_t; |
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51 #define NGX_ATOMIC_T_LEN sizeof("-2147483648") - 1 |
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52 |
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53 #define ngx_atomic_cmp_set(lock, old, new) \ |
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54 OSAtomicCompareAndSwap32Barrier(old, new, (int32_t *) lock) |
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55 |
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56 #define ngx_atomic_fetch_add(value, add) \ |
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57 (OSAtomicAdd32(add, (int32_t *) value) - add) |
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58 |
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59 #endif |
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60 |
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61 #define ngx_memory_barrier() OSMemoryBarrier() |
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62 |
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63 #define ngx_cpu_pause() |
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64 |
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65 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
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66 |
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67 |
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68 #else /* !(NGX_DARWIN) */ |
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69 |
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70 |
547 | 71 #if ( __i386__ || __i386 ) |
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72 |
561 | 73 typedef int32_t ngx_atomic_int_t; |
74 typedef uint32_t ngx_atomic_uint_t; | |
495 | 75 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
561 | 76 #define NGX_ATOMIC_T_LEN sizeof("-2147483648") - 1 |
493 | 77 |
78 | |
561 | 79 #if ( __SUNPRO_C ) |
493 | 80 |
561 | 81 #define NGX_HAVE_ATOMIC_OPS 1 |
493 | 82 |
561 | 83 ngx_atomic_uint_t |
84 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
85 ngx_atomic_uint_t set); | |
493 | 86 |
561 | 87 ngx_atomic_int_t |
88 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add); | |
493 | 89 |
561 | 90 /* the code in src/os/unix/ngx_sunpro_x86.il */ |
493 | 91 |
563 | 92 #define ngx_memory_barrier() __asm (".volatile"); __asm (".nonvolatile") |
611 | 93 #define ngx_cpu_pause() __asm ("pause") |
563 | 94 |
493 | 95 |
561 | 96 #else /* ( __GNUC__ || __INTEL_COMPILER ) */ |
97 | |
98 #define NGX_HAVE_ATOMIC_OPS 1 | |
493 | 99 |
561 | 100 #include "ngx_gcc_atomic_x86.h" |
493 | 101 |
561 | 102 #endif |
493 | 103 |
104 | |
547 | 105 #elif ( __amd64__ || __amd64 ) |
493 | 106 |
561 | 107 typedef int64_t ngx_atomic_int_t; |
108 typedef uint64_t ngx_atomic_uint_t; | |
495 | 109 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
561 | 110 #define NGX_ATOMIC_T_LEN sizeof("-9223372036854775808") - 1 |
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111 |
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112 |
561 | 113 #if ( __SUNPRO_C ) |
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114 |
561 | 115 #define NGX_HAVE_ATOMIC_OPS 1 |
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116 |
561 | 117 ngx_atomic_uint_t |
118 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
119 ngx_atomic_uint_t set); | |
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120 |
561 | 121 ngx_atomic_int_t |
122 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add); | |
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123 |
561 | 124 /* the code in src/os/unix/ngx_sunpro_amd64.il */ |
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125 |
563 | 126 #define ngx_memory_barrier() __asm (".volatile"); __asm (".nonvolatile") |
611 | 127 #define ngx_cpu_pause() __asm ("pause") |
563 | 128 |
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129 |
561 | 130 #else /* ( __GNUC__ || __INTEL_COMPILER ) */ |
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561 | 132 #define NGX_HAVE_ATOMIC_OPS 1 |
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133 |
561 | 134 #include "ngx_gcc_atomic_amd64.h" |
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135 |
561 | 136 #endif |
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547 | 139 #elif ( __sparc__ || __sparcv9 ) |
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140 |
561 | 141 #if (NGX_PTR_SIZE == 8) |
142 | |
143 typedef int64_t ngx_atomic_int_t; | |
144 typedef uint64_t ngx_atomic_uint_t; | |
145 #define NGX_ATOMIC_T_LEN sizeof("-9223372036854775808") - 1 | |
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146 |
493 | 147 #else |
561 | 148 |
149 typedef int32_t ngx_atomic_int_t; | |
150 typedef uint32_t ngx_atomic_uint_t; | |
151 #define NGX_ATOMIC_T_LEN sizeof("-2147483648") - 1 | |
152 | |
493 | 153 #endif |
154 | |
495 | 155 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
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156 |
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157 |
561 | 158 #if ( __SUNPRO_C ) |
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159 |
561 | 160 #define NGX_HAVE_ATOMIC_OPS 1 |
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161 |
561 | 162 #include "ngx_sunpro_atomic_sparc64.h" |
493 | 163 |
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164 |
561 | 165 #else /* ( __GNUC__ || __INTEL_COMPILER ) */ |
493 | 166 |
561 | 167 #define NGX_HAVE_ATOMIC_OPS 1 |
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168 |
561 | 169 #include "ngx_gcc_atomic_sparc64.h" |
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170 |
561 | 171 #endif |
493 | 172 |
173 | |
613 | 174 #elif ( __powerpc__ || __POWERPC__ ) |
493 | 175 |
176 #define NGX_HAVE_ATOMIC_OPS 1 | |
177 | |
178 #if (NGX_PTR_SIZE == 8) | |
561 | 179 |
180 typedef int64_t ngx_atomic_int_t; | |
181 typedef uint64_t ngx_atomic_uint_t; | |
182 #define NGX_ATOMIC_T_LEN sizeof("-9223372036854775808") - 1 | |
183 | |
493 | 184 #else |
561 | 185 |
186 typedef int32_t ngx_atomic_int_t; | |
187 typedef uint32_t ngx_atomic_uint_t; | |
188 #define NGX_ATOMIC_T_LEN sizeof("-2147483648") - 1 | |
189 | |
493 | 190 #endif |
191 | |
495 | 192 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
493 | 193 |
194 | |
561 | 195 #include "ngx_gcc_atomic_ppc.h" |
493 | 196 |
197 | |
561 | 198 #endif |
493 | 199 |
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200 #endif |
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201 |
493 | 202 |
561 | 203 #if !(NGX_HAVE_ATOMIC_OPS) |
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204 |
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205 #define NGX_HAVE_ATOMIC_OPS 0 |
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206 |
561 | 207 typedef int32_t ngx_atomic_int_t; |
208 typedef uint32_t ngx_atomic_uint_t; | |
495 | 209 typedef volatile ngx_atomic_uint_t ngx_atomic_t; |
561 | 210 #define NGX_ATOMIC_T_LEN sizeof("-2147483648") - 1 |
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211 |
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212 |
495 | 213 static ngx_inline ngx_atomic_uint_t |
214 ngx_atomic_cmp_set(ngx_atomic_t *lock, ngx_atomic_uint_t old, | |
215 ngx_atomic_uint_t set) | |
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216 { |
571 | 217 if (*lock == old) { |
561 | 218 *lock = set; |
219 return 1; | |
220 } | |
221 | |
222 return 0; | |
223 } | |
224 | |
225 | |
226 static ngx_inline ngx_atomic_int_t | |
227 ngx_atomic_fetch_add(ngx_atomic_t *value, ngx_atomic_int_t add) | |
228 { | |
229 ngx_atomic_int_t old; | |
230 | |
231 old = *value; | |
232 *value += add; | |
233 | |
234 return old; | |
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235 } |
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236 |
571 | 237 #define ngx_memory_barrier() |
611 | 238 #define ngx_cpu_pause() |
571 | 239 |
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240 #endif |
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241 |
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242 |
611 | 243 void ngx_spinlock(ngx_atomic_t *lock, ngx_atomic_int_t value, ngx_uint_t spin); |
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244 |
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245 #define ngx_trylock(lock) (*(lock) == 0 && ngx_atomic_cmp_set(lock, 0, 1)) |
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246 #define ngx_unlock(lock) *(lock) = 0 |
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247 |
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248 |
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249 #endif /* _NGX_ATOMIC_H_INCLUDED_ */ |