Mercurial > hg > nginx-quic
annotate src/core/ngx_shmtx.h @ 867:6a99bc84c135
axe unused code
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Fri, 24 Nov 2006 13:19:13 +0000 |
parents | 201d017ea470 |
children | 51d0884364fe |
rev | line source |
---|---|
611 | 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 #endif | |
22 } ngx_shmtx_t; | |
23 | |
24 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
611
diff
changeset
|
25 ngx_int_t ngx_shmtx_create(ngx_shmtx_t *mtx, void *addr, u_char *name); |
611 | 26 |
27 | |
28 #if (NGX_HAVE_ATOMIC_OPS) | |
29 | |
30 static ngx_inline ngx_uint_t | |
31 ngx_shmtx_trylock(ngx_shmtx_t *mtx) | |
32 { | |
33 if (*mtx->lock == 0 && ngx_atomic_cmp_set(mtx->lock, 0, ngx_pid)) { | |
34 return 1; | |
35 } | |
36 | |
37 return 0; | |
38 } | |
39 | |
40 #define ngx_shmtx_lock(mtx) ngx_spinlock((mtx)->lock, ngx_pid, 1024) | |
41 | |
42 #define ngx_shmtx_unlock(mtx) (void) ngx_atomic_cmp_set((mtx)->lock, ngx_pid, 0) | |
43 | |
44 #define ngx_shmtx_destory(mtx) | |
45 | |
46 | |
47 #else | |
48 | |
49 static ngx_inline ngx_uint_t | |
50 ngx_shmtx_trylock(ngx_shmtx_t *mtx) | |
51 { | |
52 ngx_err_t err; | |
53 | |
54 err = ngx_trylock_fd(mtx->fd); | |
55 | |
56 if (err == 0) { | |
57 return 1; | |
58 } | |
59 | |
60 if (err == NGX_EAGAIN) { | |
61 return 0; | |
62 } | |
63 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
611
diff
changeset
|
64 ngx_log_abort(err, ngx_trylock_fd_n " failed"); |
611 | 65 } |
66 | |
67 | |
68 static ngx_inline void | |
69 ngx_shmtx_lock(ngx_shmtx_t *mtx) | |
70 { | |
71 ngx_err_t err; | |
72 | |
73 err = ngx_lock_fd(mtx->fd); | |
74 | |
75 if (err == 0) { | |
76 return; | |
77 } | |
78 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
611
diff
changeset
|
79 ngx_log_abort(err, ngx_lock_fd_n " failed"); |
611 | 80 } |
81 | |
82 | |
83 static ngx_inline void | |
84 ngx_shmtx_unlock(ngx_shmtx_t *mtx) | |
85 { | |
86 ngx_err_t err; | |
87 | |
88 err = ngx_unlock_fd(mtx->fd); | |
89 | |
90 if (err == 0) { | |
91 return; | |
92 } | |
93 | |
860
201d017ea470
slab allocator in shared memory
Igor Sysoev <igor@sysoev.ru>
parents:
611
diff
changeset
|
94 ngx_log_abort(err, ngx_unlock_fd_n " failed"); |
611 | 95 } |
96 | |
97 | |
98 void ngx_shmtx_destory(ngx_shmtx_t *mtx); | |
99 | |
100 #endif | |
101 | |
102 | |
103 #endif /* _NGX_SHMTX_H_INCLUDED_ */ |