Mercurial > hg > nginx
annotate src/core/ngx_open_file_cache.h @ 4309:3f6040cd731e
Added shmtx interface to forcibly unlock mutexes.
It is currently used from master process on abnormal worker termination to
unlock accept mutex (unlocking of accept mutex was broken in 1.0.2). It is
expected to be used in the future to unlock other mutexes as well.
Shared mutex code was rewritten to make this possible in a safe way, i.e.
with a check if lock was actually held by the exited process. We again use
pid to lock mutex, and use separate atomic variable for a count of processes
waiting in sem_wait().
| author | Maxim Dounin <mdounin@mdounin.ru> |
|---|---|
| date | Wed, 23 Nov 2011 13:55:38 +0000 |
| parents | e7cd13b7f759 |
| children | d620f497c50f |
| rev | line source |
|---|---|
| 1453 | 1 |
| 2 /* | |
| 3 * Copyright (C) Igor Sysoev | |
| 4 */ | |
| 5 | |
| 6 | |
| 7 #include <ngx_config.h> | |
| 8 #include <ngx_core.h> | |
| 9 | |
| 10 | |
| 11 #ifndef _NGX_OPEN_FILE_CACHE_H_INCLUDED_ | |
| 12 #define _NGX_OPEN_FILE_CACHE_H_INCLUDED_ | |
| 13 | |
| 14 | |
| 2277 | 15 #define NGX_OPEN_FILE_DIRECTIO_OFF NGX_MAX_OFF_T_VALUE |
| 16 | |
| 17 | |
| 1453 | 18 typedef struct { |
| 19 ngx_fd_t fd; | |
| 20 ngx_file_uniq_t uniq; | |
| 21 time_t mtime; | |
| 22 off_t size; | |
|
3899
e7cd13b7f759
Use more precise stat.st_blocks to account cache size on Unix
Igor Sysoev <igor@sysoev.ru>
parents:
3178
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23 off_t fs_size; |
| 2129 | 24 off_t directio; |
| 3178 | 25 size_t read_ahead; |
|
2756
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
Igor Sysoev <igor@sysoev.ru>
parents:
2277
diff
changeset
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26 |
| 1453 | 27 ngx_err_t err; |
|
2756
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*) of.test_only to not open file if only stat() is enough
Igor Sysoev <igor@sysoev.ru>
parents:
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28 char *failed; |
| 1453 | 29 |
|
1767
c42431762903
open_file_cache_retest > open_file_cache_valid
Igor Sysoev <igor@sysoev.ru>
parents:
1765
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changeset
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30 time_t valid; |
| 1453 | 31 |
| 1772 | 32 ngx_uint_t min_uses; |
| 33 | |
| 1453 | 34 unsigned test_dir:1; |
|
2756
09cab3f8d92e
*) of.test_only to not open file if only stat() is enough
Igor Sysoev <igor@sysoev.ru>
parents:
2277
diff
changeset
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35 unsigned test_only:1; |
| 2072 | 36 unsigned log:1; |
| 1453 | 37 unsigned errors:1; |
| 1457 | 38 unsigned events:1; |
| 1453 | 39 |
| 40 unsigned is_dir:1; | |
| 41 unsigned is_file:1; | |
| 42 unsigned is_link:1; | |
| 43 unsigned is_exec:1; | |
|
2231
8564129d49b6
*) handle unaligned file part for directio
Igor Sysoev <igor@sysoev.ru>
parents:
2129
diff
changeset
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44 unsigned is_directio:1; |
| 1453 | 45 } ngx_open_file_info_t; |
| 46 | |
| 47 | |
| 48 typedef struct ngx_cached_open_file_s ngx_cached_open_file_t; | |
| 49 | |
| 50 struct ngx_cached_open_file_s { | |
| 51 ngx_rbtree_node_t node; | |
| 1765 | 52 ngx_queue_t queue; |
| 1453 | 53 |
| 54 u_char *name; | |
| 55 time_t created; | |
| 56 time_t accessed; | |
| 57 | |
| 58 ngx_fd_t fd; | |
| 59 ngx_file_uniq_t uniq; | |
| 60 time_t mtime; | |
| 61 off_t size; | |
| 62 ngx_err_t err; | |
| 63 | |
| 1772 | 64 uint32_t uses; |
| 65 | |
| 1453 | 66 unsigned count:24; |
| 67 unsigned close:1; | |
| 1775 | 68 unsigned use_event:1; |
| 1453 | 69 |
| 70 unsigned is_dir:1; | |
| 71 unsigned is_file:1; | |
| 72 unsigned is_link:1; | |
| 73 unsigned is_exec:1; | |
|
2246
987831d73bd8
cache directio flag in open file cache
Igor Sysoev <igor@sysoev.ru>
parents:
2231
diff
changeset
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74 unsigned is_directio:1; |
| 1453 | 75 |
| 76 ngx_event_t *event; | |
| 77 }; | |
| 78 | |
| 79 | |
| 80 typedef struct { | |
| 81 ngx_rbtree_t rbtree; | |
| 1761 | 82 ngx_rbtree_node_t sentinel; |
| 1765 | 83 ngx_queue_t expire_queue; |
| 1453 | 84 |
| 85 ngx_uint_t current; | |
| 86 ngx_uint_t max; | |
| 87 time_t inactive; | |
| 88 } ngx_open_file_cache_t; | |
| 89 | |
| 90 | |
| 91 typedef struct { | |
| 92 ngx_open_file_cache_t *cache; | |
| 93 ngx_cached_open_file_t *file; | |
| 1772 | 94 ngx_uint_t min_uses; |
| 1453 | 95 ngx_log_t *log; |
| 96 } ngx_open_file_cache_cleanup_t; | |
| 97 | |
| 98 | |
| 99 typedef struct { | |
| 100 | |
| 101 /* ngx_connection_t stub to allow use c->fd as event ident */ | |
| 102 void *data; | |
| 103 ngx_event_t *read; | |
| 104 ngx_event_t *write; | |
| 105 ngx_fd_t fd; | |
| 106 | |
| 107 ngx_cached_open_file_t *file; | |
| 108 ngx_open_file_cache_t *cache; | |
| 109 } ngx_open_file_cache_event_t; | |
| 110 | |
| 111 | |
| 112 ngx_open_file_cache_t *ngx_open_file_cache_init(ngx_pool_t *pool, | |
| 113 ngx_uint_t max, time_t inactive); | |
| 114 ngx_int_t ngx_open_cached_file(ngx_open_file_cache_t *cache, ngx_str_t *name, | |
| 115 ngx_open_file_info_t *of, ngx_pool_t *pool); | |
| 116 | |
| 117 | |
| 118 #endif /* _NGX_OPEN_FILE_CACHE_H_INCLUDED_ */ |