Mercurial > hg > nginx-vendor-0-7
comparison src/core/ngx_shmtx.h @ 160:73e8476f9142 NGINX_0_3_27
nginx 0.3.27
*) Change: the "variables_hash_max_size" and
"variables_hash_bucket_size" directives.
*) Feature: the $body_bytes_sent variable can be used not only in the
"log_format" directive.
*) Feature: the $ssl_protocol and $ssl_cipher variables.
*) Feature: the cache line size detection for widespread CPUs at start
time.
*) Feature: now the "accept_mutex" directive is supported using
fcntl(2) on platforms different from i386, amd64, sparc64, and ppc.
*) Feature: the "lock_file" directive and the --with-lock-path=PATH
autoconfiguration directive.
*) Bugfix: if the HTTPS protocol was used in the "proxy_pass" directive
then the requests with the body was not transferred.
author | Igor Sysoev <http://sysoev.ru> |
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date | Wed, 08 Feb 2006 00:00:00 +0300 |
parents | |
children | 6ae1357b7b7c |
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159:25c27e983933 | 160:73e8476f9142 |
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1 | |
2 /* | |
3 * Copyright (C) Igor Sysoev | |
4 */ | |
5 | |
6 | |
7 #ifndef _NGX_SHMTX_H_INCLUDED_ | |
8 #define _NGX_SHMTX_H_INCLUDED_ | |
9 | |
10 | |
11 #include <ngx_config.h> | |
12 #include <ngx_core.h> | |
13 | |
14 | |
15 typedef struct { | |
16 #if (NGX_HAVE_ATOMIC_OPS) | |
17 ngx_atomic_t *lock; | |
18 #else | |
19 ngx_fd_t fd; | |
20 u_char *name; | |
21 ngx_log_t *log; | |
22 #endif | |
23 } ngx_shmtx_t; | |
24 | |
25 | |
26 ngx_int_t ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name, | |
27 ngx_log_t *log); | |
28 | |
29 | |
30 #if (NGX_HAVE_ATOMIC_OPS) | |
31 | |
32 static ngx_inline ngx_uint_t | |
33 ngx_shmtx_trylock(ngx_shmtx_t *mtx) | |
34 { | |
35 if (*mtx->lock == 0 && ngx_atomic_cmp_set(mtx->lock, 0, ngx_pid)) { | |
36 return 1; | |
37 } | |
38 | |
39 return 0; | |
40 } | |
41 | |
42 #define ngx_shmtx_lock(mtx) ngx_spinlock((mtx)->lock, ngx_pid, 1024) | |
43 | |
44 #define ngx_shmtx_unlock(mtx) (void) ngx_atomic_cmp_set((mtx)->lock, ngx_pid, 0) | |
45 | |
46 #define ngx_shmtx_destory(mtx) | |
47 | |
48 | |
49 #else | |
50 | |
51 static ngx_inline ngx_uint_t | |
52 ngx_shmtx_trylock(ngx_shmtx_t *mtx) | |
53 { | |
54 ngx_err_t err; | |
55 | |
56 err = ngx_trylock_fd(mtx->fd); | |
57 | |
58 if (err == 0) { | |
59 return 1; | |
60 } | |
61 | |
62 if (err == NGX_EAGAIN) { | |
63 return 0; | |
64 } | |
65 | |
66 ngx_log_error(NGX_LOG_ALERT, mtx->log, err, ngx_trylock_fd_n " failed"); | |
67 | |
68 ngx_abort(); | |
69 } | |
70 | |
71 | |
72 static ngx_inline void | |
73 ngx_shmtx_lock(ngx_shmtx_t *mtx) | |
74 { | |
75 ngx_err_t err; | |
76 | |
77 err = ngx_lock_fd(mtx->fd); | |
78 | |
79 if (err == 0) { | |
80 return; | |
81 } | |
82 | |
83 ngx_log_error(NGX_LOG_ALERT, mtx->log, err, ngx_lock_fd_n " failed"); | |
84 | |
85 ngx_abort(); | |
86 } | |
87 | |
88 | |
89 static ngx_inline void | |
90 ngx_shmtx_unlock(ngx_shmtx_t *mtx) | |
91 { | |
92 ngx_err_t err; | |
93 | |
94 err = ngx_unlock_fd(mtx->fd); | |
95 | |
96 if (err == 0) { | |
97 return; | |
98 } | |
99 | |
100 ngx_log_error(NGX_LOG_ALERT, mtx->log, err, ngx_unlock_fd_n " failed"); | |
101 | |
102 ngx_abort(); | |
103 } | |
104 | |
105 | |
106 void ngx_shmtx_destory(ngx_shmtx_t *mtx); | |
107 | |
108 #endif | |
109 | |
110 | |
111 #endif /* _NGX_SHMTX_H_INCLUDED_ */ |