Mercurial > hg > nginx-quic
annotate src/event/modules/ngx_win32_select_module.c @ 5016:4406168861e8
Events: fixed null pointer dereference with resolver and poll.
A POLLERR signalled by poll() without POLLIN/POLLOUT, as seen on
Linux, would generate both read and write events, but there's no
write event handler for resolver events. A fix is to only call
event handler of an active event.
author | Ruslan Ermilov <ru@nginx.com> |
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date | Fri, 25 Jan 2013 09:59:28 +0000 |
parents | d620f497c50f |
children | 3d2d3e1cf427 |
rev | line source |
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91
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
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5 */ |
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6 |
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7 |
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8 #include <ngx_config.h> |
8
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9 #include <ngx_core.h> |
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10 #include <ngx_event.h> |
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11 |
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12 |
563 | 13 static ngx_int_t ngx_select_init(ngx_cycle_t *cycle, ngx_msec_t timer); |
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14 static void ngx_select_done(ngx_cycle_t *cycle); |
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15 static ngx_int_t ngx_select_add_event(ngx_event_t *ev, ngx_int_t event, |
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16 ngx_uint_t flags); |
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17 static ngx_int_t ngx_select_del_event(ngx_event_t *ev, ngx_int_t event, |
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18 ngx_uint_t flags); |
563 | 19 static ngx_int_t ngx_select_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, |
20 ngx_uint_t flags); | |
2780 | 21 static void ngx_select_repair_fd_sets(ngx_cycle_t *cycle); |
114
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22 static char *ngx_select_init_conf(ngx_cycle_t *cycle, void *conf); |
91
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23 |
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24 |
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25 static fd_set master_read_fd_set; |
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26 static fd_set master_write_fd_set; |
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27 static fd_set work_read_fd_set; |
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28 static fd_set work_write_fd_set; |
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29 |
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30 static ngx_uint_t max_read; |
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31 static ngx_uint_t max_write; |
314
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32 static ngx_uint_t nevents; |
17
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33 |
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34 static ngx_event_t **event_index; |
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35 |
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36 |
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37 static ngx_str_t select_name = ngx_string("select"); |
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38 |
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39 ngx_event_module_t ngx_select_module_ctx = { |
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40 &select_name, |
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41 NULL, /* create configuration */ |
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42 ngx_select_init_conf, /* init configuration */ |
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43 |
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44 { |
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45 ngx_select_add_event, /* add an event */ |
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46 ngx_select_del_event, /* delete an event */ |
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47 ngx_select_add_event, /* enable an event */ |
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48 ngx_select_del_event, /* disable an event */ |
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49 NULL, /* add an connection */ |
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50 NULL, /* delete an connection */ |
380
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51 NULL, /* process the changes */ |
91
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52 ngx_select_process_events, /* process the events */ |
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53 ngx_select_init, /* init the events */ |
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54 ngx_select_done /* done the events */ |
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55 } |
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56 |
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57 }; |
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58 |
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59 ngx_module_t ngx_select_module = { |
509 | 60 NGX_MODULE_V1, |
91
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61 &ngx_select_module_ctx, /* module context */ |
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62 NULL, /* module directives */ |
96
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63 NGX_EVENT_MODULE, /* module type */ |
541 | 64 NULL, /* init master */ |
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65 NULL, /* init module */ |
541 | 66 NULL, /* init process */ |
67 NULL, /* init thread */ | |
68 NULL, /* exit thread */ | |
69 NULL, /* exit process */ | |
70 NULL, /* exit master */ | |
71 NGX_MODULE_V1_PADDING | |
91
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72 }; |
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73 |
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74 |
501 | 75 static ngx_int_t |
563 | 76 ngx_select_init(ngx_cycle_t *cycle, ngx_msec_t timer) |
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77 { |
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78 ngx_event_t **index; |
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79 |
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80 if (event_index == NULL) { |
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81 FD_ZERO(&master_read_fd_set); |
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82 FD_ZERO(&master_write_fd_set); |
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83 nevents = 0; |
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84 } |
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85 |
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86 if (ngx_process >= NGX_PROCESS_WORKER |
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87 || cycle->old_cycle == NULL |
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88 || cycle->old_cycle->connection_n < cycle->connection_n) |
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89 { |
501 | 90 index = ngx_alloc(sizeof(ngx_event_t *) * 2 * cycle->connection_n, |
91 cycle->log); | |
92 if (index == NULL) { | |
93 return NGX_ERROR; | |
94 } | |
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95 |
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96 if (event_index) { |
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97 ngx_memcpy(index, event_index, sizeof(ngx_event_t *) * nevents); |
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98 ngx_free(event_index); |
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99 } |
563 | 100 |
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101 event_index = index; |
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102 } |
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103 |
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104 ngx_io = ngx_os_io; |
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105 |
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106 ngx_event_actions = ngx_select_module_ctx.actions; |
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107 |
563 | 108 ngx_event_flags = NGX_USE_LEVEL_EVENT; |
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109 |
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110 max_read = 0; |
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111 max_write = 0; |
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112 |
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113 return NGX_OK; |
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114 } |
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115 |
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116 |
501 | 117 static void |
118 ngx_select_done(ngx_cycle_t *cycle) | |
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119 { |
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120 ngx_free(event_index); |
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121 |
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changeset
|
122 event_index = NULL; |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
87
diff
changeset
|
123 } |
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
87
diff
changeset
|
124 |
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
87
diff
changeset
|
125 |
501 | 126 static ngx_int_t |
1354
f69d1aab6a0f
make 64-bit ngx_int_t on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
708
diff
changeset
|
127 ngx_select_add_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
128 { |
39
83fa61cd3d2f
nginx-0.0.1-2002-12-24-20:30:59 import
Igor Sysoev <igor@sysoev.ru>
parents:
38
diff
changeset
|
129 ngx_connection_t *c; |
8
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
130 |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
87
diff
changeset
|
131 c = ev->data; |
8
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
132 |
245
e6c005b66b3a
nginx-0.0.1-2004-01-30-00:45:01 import
Igor Sysoev <igor@sysoev.ru>
parents:
230
diff
changeset
|
133 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
1354
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make 64-bit ngx_int_t on 64-bit platforms
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parents:
708
diff
changeset
|
134 "select add event fd:%d ev:%i", c->fd, event); |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
135 |
38
2ffaa35fba42
nginx-0.0.1-2002-12-24-10:09:57 import
Igor Sysoev <igor@sysoev.ru>
parents:
36
diff
changeset
|
136 if (ev->index != NGX_INVALID_INDEX) { |
2ffaa35fba42
nginx-0.0.1-2002-12-24-10:09:57 import
Igor Sysoev <igor@sysoev.ru>
parents:
36
diff
changeset
|
137 ngx_log_error(NGX_LOG_ALERT, ev->log, 0, |
1354
f69d1aab6a0f
make 64-bit ngx_int_t on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
708
diff
changeset
|
138 "select event fd:%d ev:%i is already set", c->fd, event); |
38
2ffaa35fba42
nginx-0.0.1-2002-12-24-10:09:57 import
Igor Sysoev <igor@sysoev.ru>
parents:
36
diff
changeset
|
139 return NGX_OK; |
2ffaa35fba42
nginx-0.0.1-2002-12-24-10:09:57 import
Igor Sysoev <igor@sysoev.ru>
parents:
36
diff
changeset
|
140 } |
2ffaa35fba42
nginx-0.0.1-2002-12-24-10:09:57 import
Igor Sysoev <igor@sysoev.ru>
parents:
36
diff
changeset
|
141 |
2808
b7b2b0ea3366
test event type to prevent errors
Igor Sysoev <igor@sysoev.ru>
parents:
2781
diff
changeset
|
142 if ((event == NGX_READ_EVENT && ev->write) |
b7b2b0ea3366
test event type to prevent errors
Igor Sysoev <igor@sysoev.ru>
parents:
2781
diff
changeset
|
143 || (event == NGX_WRITE_EVENT && !ev->write)) |
b7b2b0ea3366
test event type to prevent errors
Igor Sysoev <igor@sysoev.ru>
parents:
2781
diff
changeset
|
144 { |
b7b2b0ea3366
test event type to prevent errors
Igor Sysoev <igor@sysoev.ru>
parents:
2781
diff
changeset
|
145 ngx_log_error(NGX_LOG_ALERT, ev->log, 0, |
b7b2b0ea3366
test event type to prevent errors
Igor Sysoev <igor@sysoev.ru>
parents:
2781
diff
changeset
|
146 "invalid select %s event fd:%d ev:%i", |
b7b2b0ea3366
test event type to prevent errors
Igor Sysoev <igor@sysoev.ru>
parents:
2781
diff
changeset
|
147 ev->write ? "write" : "read", c->fd, event); |
b7b2b0ea3366
test event type to prevent errors
Igor Sysoev <igor@sysoev.ru>
parents:
2781
diff
changeset
|
148 return NGX_ERROR; |
b7b2b0ea3366
test event type to prevent errors
Igor Sysoev <igor@sysoev.ru>
parents:
2781
diff
changeset
|
149 } |
b7b2b0ea3366
test event type to prevent errors
Igor Sysoev <igor@sysoev.ru>
parents:
2781
diff
changeset
|
150 |
8
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
151 if ((event == NGX_READ_EVENT) && (max_read >= FD_SETSIZE) |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
152 || (event == NGX_WRITE_EVENT) && (max_write >= FD_SETSIZE)) |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
153 { |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
154 ngx_log_error(NGX_LOG_ERR, ev->log, 0, |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
155 "maximum number of descriptors " |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
156 "supported by select() is %d", FD_SETSIZE); |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
157 return NGX_ERROR; |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
158 } |
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
159 |
8
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
160 if (event == NGX_READ_EVENT) { |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
161 FD_SET(c->fd, &master_read_fd_set); |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
162 max_read++; |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
163 |
8
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
164 } else if (event == NGX_WRITE_EVENT) { |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
165 FD_SET(c->fd, &master_write_fd_set); |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
166 max_write++; |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
167 } |
179
9f3a78b06c48
nginx-0.0.1-2003-11-11-21:13:43 import
Igor Sysoev <igor@sysoev.ru>
parents:
178
diff
changeset
|
168 |
39
83fa61cd3d2f
nginx-0.0.1-2002-12-24-20:30:59 import
Igor Sysoev <igor@sysoev.ru>
parents:
38
diff
changeset
|
169 ev->active = 1; |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
170 |
17
8dd06e2844f5
nginx-0.0.1-2002-09-27-19:05:29 import
Igor Sysoev <igor@sysoev.ru>
parents:
13
diff
changeset
|
171 event_index[nevents] = ev; |
8dd06e2844f5
nginx-0.0.1-2002-09-27-19:05:29 import
Igor Sysoev <igor@sysoev.ru>
parents:
13
diff
changeset
|
172 ev->index = nevents; |
8dd06e2844f5
nginx-0.0.1-2002-09-27-19:05:29 import
Igor Sysoev <igor@sysoev.ru>
parents:
13
diff
changeset
|
173 nevents++; |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
174 |
8
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
175 return NGX_OK; |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
176 } |
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
177 |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
87
diff
changeset
|
178 |
501 | 179 static ngx_int_t |
1354
f69d1aab6a0f
make 64-bit ngx_int_t on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
708
diff
changeset
|
180 ngx_select_del_event(ngx_event_t *ev, ngx_int_t event, ngx_uint_t flags) |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
181 { |
2809 | 182 ngx_event_t *e; |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
87
diff
changeset
|
183 ngx_connection_t *c; |
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
87
diff
changeset
|
184 |
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
87
diff
changeset
|
185 c = ev->data; |
8
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
186 |
314
d71c87d11b16
nginx-0.0.3-2004-04-14-09:57:36 import
Igor Sysoev <igor@sysoev.ru>
parents:
302
diff
changeset
|
187 ev->active = 0; |
d71c87d11b16
nginx-0.0.3-2004-04-14-09:57:36 import
Igor Sysoev <igor@sysoev.ru>
parents:
302
diff
changeset
|
188 |
92
19cc647ecd91
nginx-0.0.1-2003-05-20-19:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents:
91
diff
changeset
|
189 if (ev->index == NGX_INVALID_INDEX) { |
26
53cb81681040
nginx-0.0.1-2002-12-15-09:25:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
23
diff
changeset
|
190 return NGX_OK; |
92
19cc647ecd91
nginx-0.0.1-2003-05-20-19:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents:
91
diff
changeset
|
191 } |
26
53cb81681040
nginx-0.0.1-2002-12-15-09:25:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
23
diff
changeset
|
192 |
245
e6c005b66b3a
nginx-0.0.1-2004-01-30-00:45:01 import
Igor Sysoev <igor@sysoev.ru>
parents:
230
diff
changeset
|
193 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, ev->log, 0, |
1354
f69d1aab6a0f
make 64-bit ngx_int_t on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
708
diff
changeset
|
194 "select del event fd:%d ev:%i", c->fd, event); |
23
f540a63026c9
nginx-0.0.1-2002-12-06-19:32:33 import
Igor Sysoev <igor@sysoev.ru>
parents:
17
diff
changeset
|
195 |
8
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
196 if (event == NGX_READ_EVENT) { |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
197 FD_CLR(c->fd, &master_read_fd_set); |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
198 max_read--; |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
199 |
8
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
200 } else if (event == NGX_WRITE_EVENT) { |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
201 FD_CLR(c->fd, &master_write_fd_set); |
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
202 max_write--; |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
203 } |
92
19cc647ecd91
nginx-0.0.1-2003-05-20-19:37:55 import
Igor Sysoev <igor@sysoev.ru>
parents:
91
diff
changeset
|
204 |
1354
f69d1aab6a0f
make 64-bit ngx_int_t on 64-bit platforms
Igor Sysoev <igor@sysoev.ru>
parents:
708
diff
changeset
|
205 if (ev->index < --nevents) { |
2809 | 206 e = event_index[nevents]; |
207 event_index[ev->index] = e; | |
208 e->index = ev->index; | |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
209 } |
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
210 |
26
53cb81681040
nginx-0.0.1-2002-12-15-09:25:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
23
diff
changeset
|
211 ev->index = NGX_INVALID_INDEX; |
53cb81681040
nginx-0.0.1-2002-12-15-09:25:09 import
Igor Sysoev <igor@sysoev.ru>
parents:
23
diff
changeset
|
212 |
8
708f8bb772ec
nginx-0.0.1-2002-09-02-18:48:24 import
Igor Sysoev <igor@sysoev.ru>
parents:
7
diff
changeset
|
213 return NGX_OK; |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
214 } |
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
215 |
91
637625a2acdb
nginx-0.0.1-2003-05-19-20:39:14 import
Igor Sysoev <igor@sysoev.ru>
parents:
87
diff
changeset
|
216 |
501 | 217 static ngx_int_t |
563 | 218 ngx_select_process_events(ngx_cycle_t *cycle, ngx_msec_t timer, |
219 ngx_uint_t flags) | |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
220 { |
2778 | 221 int ready, nready; |
222 ngx_err_t err; | |
223 ngx_uint_t i, found; | |
224 ngx_event_t *ev, **queue; | |
225 struct timeval tv, *tp; | |
226 ngx_connection_t *c; | |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
227 |
315
39b6f2df45c0
nginx-0.0.3-2004-04-14-21:44:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
314
diff
changeset
|
228 #if (NGX_DEBUG) |
323
ba876b26b76d
nginx-0.0.3-2004-04-21-22:54:33 import
Igor Sysoev <igor@sysoev.ru>
parents:
321
diff
changeset
|
229 if (cycle->log->log_level & NGX_LOG_DEBUG_ALL) { |
ba876b26b76d
nginx-0.0.3-2004-04-21-22:54:33 import
Igor Sysoev <igor@sysoev.ru>
parents:
321
diff
changeset
|
230 for (i = 0; i < nevents; i++) { |
ba876b26b76d
nginx-0.0.3-2004-04-21-22:54:33 import
Igor Sysoev <igor@sysoev.ru>
parents:
321
diff
changeset
|
231 ev = event_index[i]; |
ba876b26b76d
nginx-0.0.3-2004-04-21-22:54:33 import
Igor Sysoev <igor@sysoev.ru>
parents:
321
diff
changeset
|
232 c = ev->data; |
ba876b26b76d
nginx-0.0.3-2004-04-21-22:54:33 import
Igor Sysoev <igor@sysoev.ru>
parents:
321
diff
changeset
|
233 ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
ba876b26b76d
nginx-0.0.3-2004-04-21-22:54:33 import
Igor Sysoev <igor@sysoev.ru>
parents:
321
diff
changeset
|
234 "select event: fd:%d wr:%d", c->fd, ev->write); |
ba876b26b76d
nginx-0.0.3-2004-04-21-22:54:33 import
Igor Sysoev <igor@sysoev.ru>
parents:
321
diff
changeset
|
235 } |
315
39b6f2df45c0
nginx-0.0.3-2004-04-14-21:44:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
314
diff
changeset
|
236 } |
39b6f2df45c0
nginx-0.0.3-2004-04-14-21:44:28 import
Igor Sysoev <igor@sysoev.ru>
parents:
314
diff
changeset
|
237 #endif |
0
4eff17414a43
nginx-0.0.1-2002-08-06-20:39:45 import
Igor Sysoev <igor@sysoev.ru>
parents:
diff
changeset
|
238 |
316
a0beefedaf94
nginx-0.0.3-2004-04-15-00:34:05 import
Igor Sysoev <igor@sysoev.ru>
parents:
315
diff
changeset
|
239 if (timer == NGX_TIMER_INFINITE) { |
a0beefedaf94
nginx-0.0.3-2004-04-15-00:34:05 import
Igor Sysoev <igor@sysoev.ru>
parents:
315
diff
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240 tp = NULL; |
315
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241 |
316
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242 } else { |
557 | 243 tv.tv_sec = (long) (timer / 1000); |
244 tv.tv_usec = (long) ((timer % 1000) * 1000); | |
315
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245 tp = &tv; |
26
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246 } |
314
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247 |
302
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248 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
557 | 249 "select timer: %M", timer); |
0
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250 |
315
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251 work_read_fd_set = master_read_fd_set; |
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252 work_write_fd_set = master_write_fd_set; |
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253 |
2777
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254 if (max_read || max_write) { |
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255 ready = select(0, &work_read_fd_set, &work_write_fd_set, NULL, tp); |
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256 |
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257 } else { |
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258 |
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259 /* |
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260 * Winsock select() requires that at least one descriptor set must be |
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261 * be non-null, and any non-null descriptor set must contain at least |
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262 * one handle to a socket. Otherwise select() returns WSAEINVAL. |
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263 */ |
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264 |
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265 ngx_msleep(timer); |
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266 |
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267 ready = 0; |
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268 } |
563 | 269 |
3043 | 270 err = (ready == -1) ? ngx_socket_errno : 0; |
0
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271 |
563 | 272 if (flags & NGX_UPDATE_TIME) { |
3475
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273 ngx_time_update(); |
563 | 274 } |
178
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275 |
302
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276 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
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277 "select ready %d", ready); |
245
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278 |
114
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279 if (err) { |
302
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280 ngx_log_error(NGX_LOG_ALERT, cycle->log, err, "select() failed"); |
2780 | 281 |
282 if (err == WSAENOTSOCK) { | |
283 ngx_select_repair_fd_sets(cycle); | |
284 } | |
285 | |
114
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286 return NGX_ERROR; |
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287 } |
0
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288 |
567 | 289 if (ready == 0) { |
290 if (timer != NGX_TIMER_INFINITE) { | |
291 return NGX_OK; | |
292 } | |
293 | |
294 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, | |
295 "select() returned no events without timeout"); | |
296 return NGX_ERROR; | |
563 | 297 } |
298 | |
299 ngx_mutex_lock(ngx_posted_events_mutex); | |
300 | |
17
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301 nready = 0; |
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302 |
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303 for (i = 0; i < nevents; i++) { |
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304 ev = event_index[i]; |
250
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305 c = ev->data; |
0
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306 found = 0; |
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307 |
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308 if (ev->write) { |
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309 if (FD_ISSET(c->fd, &work_write_fd_set)) { |
39
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310 found = 1; |
302
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311 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
245
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312 "select write %d", c->fd); |
0
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313 } |
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314 |
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315 } else { |
8
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316 if (FD_ISSET(c->fd, &work_read_fd_set)) { |
39
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317 found = 1; |
302
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318 ngx_log_debug1(NGX_LOG_DEBUG_EVENT, cycle->log, 0, |
245
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319 "select read %d", c->fd); |
0
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320 } |
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321 } |
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322 |
17
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323 if (found) { |
314
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324 ev->ready = 1; |
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325 |
563 | 326 queue = (ngx_event_t **) (ev->accept ? &ngx_posted_accept_events: |
327 &ngx_posted_events); | |
577 | 328 ngx_locked_post_event(ev, queue); |
314
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329 |
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330 nready++; |
17
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331 } |
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332 } |
13
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333 |
563 | 334 ngx_mutex_unlock(ngx_posted_events_mutex); |
314
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335 |
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336 if (ready != nready) { |
2781
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337 ngx_log_error(NGX_LOG_ALERT, cycle->log, 0, |
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338 "select ready != events: %d:%d", ready, nready); |
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339 |
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340 ngx_select_repair_fd_sets(cycle); |
0
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341 } |
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342 |
8
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343 return NGX_OK; |
0
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344 } |
91
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345 |
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346 |
2780 | 347 static void |
348 ngx_select_repair_fd_sets(ngx_cycle_t *cycle) | |
349 { | |
350 int n; | |
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351 u_int i; |
2780 | 352 socklen_t len; |
353 ngx_err_t err; | |
354 ngx_socket_t s; | |
355 | |
356 for (i = 0; i < master_read_fd_set.fd_count; i++) { | |
357 | |
358 s = master_read_fd_set.fd_array[i]; | |
359 len = sizeof(int); | |
360 | |
361 if (getsockopt(s, SOL_SOCKET, SO_TYPE, (char *) &n, &len) == -1) { | |
362 err = ngx_socket_errno; | |
363 | |
364 ngx_log_error(NGX_LOG_ALERT, cycle->log, err, | |
365 "invalid descriptor #%d in read fd_set", s); | |
366 | |
367 FD_CLR(s, &master_read_fd_set); | |
368 } | |
369 } | |
370 | |
371 for (i = 0; i < master_write_fd_set.fd_count; i++) { | |
372 | |
373 s = master_write_fd_set.fd_array[i]; | |
374 len = sizeof(int); | |
375 | |
376 if (getsockopt(s, SOL_SOCKET, SO_TYPE, (char *) &n, &len) == -1) { | |
377 err = ngx_socket_errno; | |
378 | |
379 ngx_log_error(NGX_LOG_ALERT, cycle->log, err, | |
380 "invalid descriptor #%d in write fd_set", s); | |
381 | |
382 FD_CLR(s, &master_write_fd_set); | |
383 } | |
384 } | |
385 } | |
386 | |
387 | |
501 | 388 static char * |
389 ngx_select_init_conf(ngx_cycle_t *cycle, void *conf) | |
91
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390 { |
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391 ngx_event_conf_t *ecf; |
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392 |
114
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393 ecf = ngx_event_get_conf(cycle->conf_ctx, ngx_event_core_module); |
91
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394 |
321
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diff
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395 if (ecf->use != ngx_select_module.ctx_index) { |
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396 return NGX_CONF_OK; |
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397 } |
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398 |
91
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399 return NGX_CONF_OK; |
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400 } |