annotate src/os/unix/ngx_atomic.h @ 485:4ebe09b07e30 release-0.1.17

nginx-0.1.17-RELEASE import *) Change: the ngx_http_rewrite_module was rewritten from the scratch. Now it is possible to redirect, to return the error codes, to check the variables and referrers. The directives can be used inside locations. The redirect directive was canceled. *) Feature: the ngx_http_geo_module. *) Feature: the proxy_set_x_var and fastcgi_set_var directives. *) Bugfix: the location configuration with "=" modifier may be used in another location. *) Bugfix: the correct content type was set only for requests that use small caps letters in extension. *) Bugfix: if the proxy_pass or fastcgi_pass directives were set in the location, and access was denied, and the error was redirected to a static page, then the segmentation fault occurred. *) Bugfix: if in a proxied "Location" header was a relative URL, then a host name and a slash were added to them; the bug had appeared in 0.1.14. *) Bugfix: the system error message was not logged on Linux.
author Igor Sysoev <igor@sysoev.ru>
date Thu, 03 Feb 2005 19:33:37 +0000
parents 42d11f017717
children 975f62e77f02
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1
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2 /*
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42d11f017717 nginx-0.1.0-2004-09-29-20:00:49 import; remove years from copyright
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3 * Copyright (C) Igor Sysoev
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4 */
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5
da8c5707af39 nginx-0.1.0-2004-09-28-12:34:51 import; set copyright and remove unused files
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6
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679f60139863 nginx-0.0.1-2003-12-19-11:15:11 import
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7 #ifndef _NGX_ATOMIC_H_INCLUDED_
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8 #define _NGX_ATOMIC_H_INCLUDED_
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679f60139863 nginx-0.0.1-2003-12-19-11:15:11 import
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11 #include <ngx_config.h>
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12 #include <ngx_core.h>
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14
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15 #if ( __i386__ || __amd64__ )
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16
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17 #define NGX_HAVE_ATOMIC_OPS 1
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18
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19 typedef volatile uint32_t ngx_atomic_t;
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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
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
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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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33
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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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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
435
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61 #endif
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62
266
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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
301
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82
425
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83 #elif ( __sparc__ )
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84
435
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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
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
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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
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
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94 old = *value;
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95
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
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96 for ( ;; ) {
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97
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
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98 new = old + 1;
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99 res = new;
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
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100
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
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101 __asm__ volatile (
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102
433
9a97dcdd2421 nginx-0.0.11-2004-09-21-19:47:05 import
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103 "casa [%1] 0x80, %2, %0"
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104
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
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105 : "+r" (res) : "r" (value), "r" (old));
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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) {
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108 return new;
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
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109 }
bd39260a1383 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;
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
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112 }
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
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113 }
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
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114
bd39260a1383 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,
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diff changeset
117 ngx_atomic_t old,
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 373
diff changeset
118 ngx_atomic_t set)
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 373
diff changeset
119 {
428
5e73d0ea4dab nginx-0.0.11-2004-09-16-20:10:13 import
Igor Sysoev <igor@sysoev.ru>
parents: 425
diff changeset
120 uint32_t res = (uint32_t) set;
425
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 373
diff changeset
121
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 373
diff changeset
122 __asm__ volatile (
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 373
diff changeset
123
433
9a97dcdd2421 nginx-0.0.11-2004-09-21-19:47:05 import
Igor Sysoev <igor@sysoev.ru>
parents: 428
diff changeset
124 "casa [%1] 0x80, %2, %0"
425
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 373
diff changeset
125
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 373
diff changeset
126 : "+r" (res) : "r" (lock), "r" (old));
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 373
diff changeset
127
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 373
diff changeset
128 return (res == old);
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 373
diff changeset
129 }
bd39260a1383 nginx-0.0.10-2004-09-14-19:55:24 import
Igor Sysoev <igor@sysoev.ru>
parents: 373
diff changeset
130
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 213
diff changeset
131 #else
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 213
diff changeset
132
435
5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents: 433
diff changeset
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 changeset
134
267
83205e0b5522 nginx-0.0.2-2004-02-24-20:31:46 import
Igor Sysoev <igor@sysoev.ru>
parents: 266
diff changeset
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
diff changeset
136
435
5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents: 433
diff changeset
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 changeset
138
5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents: 433
diff changeset
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 changeset
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 changeset
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 changeset
142 {
5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents: 433
diff changeset
143 return 1;
5cdc4838d4e8 nginx-0.0.11-2004-09-22-20:18:21 import
Igor Sysoev <igor@sysoev.ru>
parents: 433
diff changeset
144 }
266
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 213
diff changeset
145
5238e93961a1 nginx-0.0.2-2004-02-23-23:57:12 import
Igor Sysoev <igor@sysoev.ru>
parents: 213
diff changeset
146 #endif
212
679f60139863 nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
147
679f60139863 nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
148
373
018569a8f09c nginx-0.0.7-2004-06-30-19:30:41 import
Igor Sysoev <igor@sysoev.ru>
parents: 371
diff changeset
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 changeset
150
371
780e93985b93 nginx-0.0.7-2004-06-28-20:05:02 import
Igor Sysoev <igor@sysoev.ru>
parents: 370
diff changeset
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
diff changeset
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 changeset
154
212
679f60139863 nginx-0.0.1-2003-12-19-11:15:11 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff changeset
155 #endif /* _NGX_ATOMIC_H_INCLUDED_ */