Mercurial > hg > nginx-quic
view src/event/ngx_event.c @ 342:0ee0642af5f1
nginx-0.0.3-2004-05-26-23:33:53 import
author | Igor Sysoev <igor@sysoev.ru> |
---|---|
date | Wed, 26 May 2004 19:33:53 +0000 |
parents | f168a88e93f7 |
children | e366ba5db8f8 |
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#include <ngx_config.h> #include <ngx_core.h> #include <ngx_event.h> #define DEFAULT_CONNECTIONS 512 extern ngx_module_t ngx_select_module; extern ngx_event_module_t ngx_select_module_ctx; #if (HAVE_KQUEUE) #include <ngx_kqueue_module.h> #endif #if (HAVE_DEVPOLL) extern ngx_module_t ngx_devpoll_module; extern ngx_event_module_t ngx_devpoll_module_ctx; #endif #if (HAVE_EPOLL) extern ngx_module_t ngx_epoll_module; extern ngx_event_module_t ngx_epoll_module_ctx; #endif #if (HAVE_AIO) #include <ngx_aio_module.h> #endif static ngx_int_t ngx_event_module_init(ngx_cycle_t *cycle); static ngx_int_t ngx_event_process_init(ngx_cycle_t *cycle); static char *ngx_events_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_event_connections(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_event_use(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static char *ngx_event_debug_connection(ngx_conf_t *cf, ngx_command_t *cmd, void *conf); static void *ngx_event_create_conf(ngx_cycle_t *cycle); static char *ngx_event_init_conf(ngx_cycle_t *cycle, void *conf); static ngx_uint_t ngx_event_max_module; ngx_uint_t ngx_event_flags; ngx_event_actions_t ngx_event_actions; ngx_atomic_t connection_counter; ngx_atomic_t *ngx_connection_counter = &connection_counter; ngx_atomic_t *ngx_accept_mutex_ptr; ngx_atomic_t *ngx_accept_mutex; ngx_uint_t ngx_accept_mutex_held; ngx_msec_t ngx_accept_mutex_delay; ngx_int_t ngx_accept_disabled; static ngx_command_t ngx_events_commands[] = { { ngx_string("events"), NGX_MAIN_CONF|NGX_CONF_BLOCK|NGX_CONF_NOARGS, ngx_events_block, 0, 0, NULL }, ngx_null_command }; static ngx_core_module_t ngx_events_module_ctx = { ngx_string("events"), NULL, NULL }; ngx_module_t ngx_events_module = { NGX_MODULE, &ngx_events_module_ctx, /* module context */ ngx_events_commands, /* module directives */ NGX_CORE_MODULE, /* module type */ NULL, /* init module */ NULL /* init child */ }; static ngx_str_t event_core_name = ngx_string("event_core"); static ngx_command_t ngx_event_core_commands[] = { { ngx_string("connections"), NGX_EVENT_CONF|NGX_CONF_TAKE1, ngx_event_connections, 0, 0, NULL }, { ngx_string("use"), NGX_EVENT_CONF|NGX_CONF_TAKE1, ngx_event_use, 0, 0, NULL }, { ngx_string("multi_accept"), NGX_EVENT_CONF|NGX_CONF_TAKE1, ngx_conf_set_flag_slot, 0, offsetof(ngx_event_conf_t, multi_accept), NULL }, { ngx_string("accept_mutex"), NGX_EVENT_CONF|NGX_CONF_TAKE1, ngx_conf_set_flag_slot, 0, offsetof(ngx_event_conf_t, accept_mutex), NULL }, { ngx_string("accept_mutex_delay"), NGX_EVENT_CONF|NGX_CONF_TAKE1, ngx_conf_set_msec_slot, 0, offsetof(ngx_event_conf_t, accept_mutex_delay), NULL }, { ngx_string("debug_connection"), NGX_EVENT_CONF|NGX_CONF_TAKE1, ngx_event_debug_connection, 0, 0, NULL }, ngx_null_command }; ngx_event_module_t ngx_event_core_module_ctx = { &event_core_name, ngx_event_create_conf, /* create configuration */ ngx_event_init_conf, /* init configuration */ { NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL } }; ngx_module_t ngx_event_core_module = { NGX_MODULE, &ngx_event_core_module_ctx, /* module context */ ngx_event_core_commands, /* module directives */ NGX_EVENT_MODULE, /* module type */ ngx_event_module_init, /* init module */ ngx_event_process_init /* init process */ }; static ngx_int_t ngx_event_module_init(ngx_cycle_t *cycle) { #if !(WIN32) size_t size; char *shared; ngx_core_conf_t *ccf; ngx_event_conf_t *ecf; ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); if (ccf->master == 0 || ngx_accept_mutex_ptr) { return NGX_OK; } ecf = ngx_event_get_conf(cycle->conf_ctx, ngx_event_core_module); /* TODO: 128 is cache line size */ size = 128 /* ngx_accept_mutex */ + 128; /* ngx_connection_counter */ shared = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_ANON|MAP_SHARED, -1, 0); if (shared == NULL) { ngx_log_error(NGX_LOG_EMERG, cycle->log, ngx_errno, "mmap(MAP_ANON|MAP_SHARED) failed"); return NGX_ERROR; } ngx_accept_mutex_ptr = (ngx_atomic_t *) shared; ngx_connection_counter = (ngx_atomic_t *) (shared + 128); ngx_log_debug2(NGX_LOG_DEBUG_EVENT, cycle->log, 0, "counter: " PTR_FMT ", %d", ngx_connection_counter, *ngx_connection_counter); #endif return NGX_OK; } static ngx_int_t ngx_event_process_init(ngx_cycle_t *cycle) { ngx_uint_t m, i; ngx_socket_t fd; ngx_event_t *rev, *wev; ngx_listening_t *s; ngx_connection_t *c; ngx_core_conf_t *ccf; ngx_event_conf_t *ecf; ngx_event_module_t *module; #if (WIN32) ngx_iocp_conf_t *iocpcf; #endif ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module); ecf = ngx_event_get_conf(cycle->conf_ctx, ngx_event_core_module); if (ngx_accept_mutex_ptr && ccf->worker_processes > 1 && ecf->accept_mutex) { ngx_accept_mutex = ngx_accept_mutex_ptr; ngx_accept_mutex_held = 1; ngx_accept_mutex_delay = ecf->accept_mutex_delay; } #if (NGX_THREADS) if (!(ngx_posted_events_mutex = ngx_mutex_init(cycle->log, 0))) { return NGX_ERROR; } #endif if (ngx_event_timer_init(cycle->log) == NGX_ERROR) { return NGX_ERROR; } cycle->connection_n = ecf->connections; for (m = 0; ngx_modules[m]; m++) { if (ngx_modules[m]->type != NGX_EVENT_MODULE) { continue; } if (ngx_modules[m]->ctx_index == ecf->use) { module = ngx_modules[m]->ctx; if (module->actions.init(cycle) == NGX_ERROR) { /* fatal */ exit(2); } break; } } cycle->connections = ngx_alloc(sizeof(ngx_connection_t) * ecf->connections, cycle->log); if (cycle->connections == NULL) { return NGX_ERROR; } c = cycle->connections; for (i = 0; i < cycle->connection_n; i++) { c[i].fd = (ngx_socket_t) -1; } cycle->read_events = ngx_alloc(sizeof(ngx_event_t) * ecf->connections, cycle->log); if (cycle->read_events == NULL) { return NGX_ERROR; } cycle->write_events = ngx_alloc(sizeof(ngx_event_t) * ecf->connections, cycle->log); if (cycle->write_events == NULL) { return NGX_ERROR; } /* for each listening socket */ s = cycle->listening.elts; for (i = 0; i < cycle->listening.nelts; i++) { fd = s[i].fd; #if (WIN32) /* * Winsock assignes a socket number divisible by 4 * so to find a connection we divide a socket number by 4. */ fd /= 4; #endif c = &cycle->connections[fd]; rev = &cycle->read_events[fd]; wev = &cycle->write_events[fd]; ngx_memzero(c, sizeof(ngx_connection_t)); ngx_memzero(rev, sizeof(ngx_event_t)); c->fd = s[i].fd; c->listening = &s[i]; c->ctx = s[i].ctx; c->servers = s[i].servers; c->log = s[i].log; c->read = rev; /* required by iocp in "c->write->active = 1" */ c->write = wev; /* required by poll */ wev->index = NGX_INVALID_INDEX; rev->log = c->log; rev->data = c; rev->index = NGX_INVALID_INDEX; rev->available = 0; rev->accept = 1; #if (HAVE_DEFERRED_ACCEPT) rev->deferred_accept = s[i].deferred_accept; #endif if (!(ngx_event_flags & NGX_USE_IOCP_EVENT)) { if (s[i].remain) { /* * delete the old accept events that were bound to * the old cycle read events array */ if (ngx_del_event(&cycle->old_cycle->read_events[fd], NGX_READ_EVENT, NGX_CLOSE_EVENT) == NGX_ERROR) { return NGX_ERROR; } cycle->old_cycle->connections[fd].fd = (ngx_socket_t) -1; } } #if (WIN32) if (ngx_event_flags & NGX_USE_IOCP_EVENT) { rev->event_handler = &ngx_event_acceptex; if (ngx_add_event(rev, 0, NGX_IOCP_ACCEPT) == NGX_ERROR) { return NGX_ERROR; } iocpcf = ngx_event_get_conf(cycle->conf_ctx, ngx_iocp_module); if (ngx_event_post_acceptex(&s[i], iocpcf->post_acceptex) == NGX_ERROR) { return NGX_ERROR; } } else { rev->event_handler = &ngx_event_accept; if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) { return NGX_ERROR; } } #else rev->event_handler = &ngx_event_accept; if (ngx_event_flags & NGX_USE_SIGIO_EVENT) { if (ngx_add_conn(c) == NGX_ERROR) { return NGX_ERROR; } } else { if (ngx_add_event(rev, NGX_READ_EVENT, 0) == NGX_ERROR) { return NGX_ERROR; } } #endif } return NGX_OK; } static char *ngx_events_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { int m; char *rv; void ***ctx; ngx_conf_t pcf; ngx_event_module_t *module; /* count the number of the event modules and set up their indices */ ngx_event_max_module = 0; for (m = 0; ngx_modules[m]; m++) { if (ngx_modules[m]->type != NGX_EVENT_MODULE) { continue; } ngx_modules[m]->ctx_index = ngx_event_max_module++; } ngx_test_null(ctx, ngx_pcalloc(cf->pool, sizeof(void *)), NGX_CONF_ERROR); ngx_test_null(*ctx, ngx_pcalloc(cf->pool, ngx_event_max_module * sizeof(void *)), NGX_CONF_ERROR); *(void **) conf = ctx; for (m = 0; ngx_modules[m]; m++) { if (ngx_modules[m]->type != NGX_EVENT_MODULE) { continue; } module = ngx_modules[m]->ctx; if (module->create_conf) { ngx_test_null((*ctx)[ngx_modules[m]->ctx_index], module->create_conf(cf->cycle), NGX_CONF_ERROR); } } pcf = *cf; cf->ctx = ctx; cf->module_type = NGX_EVENT_MODULE; cf->cmd_type = NGX_EVENT_CONF; rv = ngx_conf_parse(cf, NULL); *cf = pcf; if (rv != NGX_CONF_OK) return rv; for (m = 0; ngx_modules[m]; m++) { if (ngx_modules[m]->type != NGX_EVENT_MODULE) { continue; } module = ngx_modules[m]->ctx; if (module->init_conf) { rv = module->init_conf(cf->cycle, (*ctx)[ngx_modules[m]->ctx_index]); if (rv != NGX_CONF_OK) { return rv; } } } return NGX_CONF_OK; } static char *ngx_event_connections(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_event_conf_t *ecf = conf; ngx_str_t *value; if (ecf->connections != NGX_CONF_UNSET_UINT) { return "is duplicate" ; } value = cf->args->elts; ecf->connections = ngx_atoi(value[1].data, value[1].len); if (ecf->connections == (ngx_uint_t) NGX_ERROR) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid number \"%s\"", value[1].data); return NGX_CONF_ERROR; } cf->cycle->connection_n = ecf->connections; return NGX_CONF_OK; } static char *ngx_event_use(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { ngx_event_conf_t *ecf = conf; ngx_int_t m; ngx_str_t *value; ngx_event_conf_t *old_ecf; ngx_event_module_t *module; if (ecf->use != NGX_CONF_UNSET) { return "is duplicate" ; } value = cf->args->elts; if (cf->cycle->old_cycle->conf_ctx) { old_ecf = ngx_event_get_conf(cf->cycle->old_cycle->conf_ctx, ngx_event_core_module); } else { old_ecf = NULL; } for (m = 0; ngx_modules[m]; m++) { if (ngx_modules[m]->type != NGX_EVENT_MODULE) { continue; } module = ngx_modules[m]->ctx; if (module->name->len == value[1].len) { if (ngx_strcmp(module->name->data, value[1].data) == 0) { ecf->use = ngx_modules[m]->ctx_index; ecf->name = module->name->data; if (ngx_process == NGX_PROCESS_SINGLE && old_ecf && old_ecf->use != ecf->use) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "when the server runs without a master process " "the \"%s\" event type must be the same as " "in previous configuration - \"%s\" " "and it can not be changed on the fly, " "to change it you need to stop server " "and start it again", value[1].data, old_ecf->name); return NGX_CONF_ERROR; } return NGX_CONF_OK; } } } ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "invalid event type \"%s\"", value[1].data); return NGX_CONF_ERROR; } static char *ngx_event_debug_connection(ngx_conf_t *cf, ngx_command_t *cmd, void *conf) { #if (NGX_DEBUG) ngx_event_conf_t *ecf = conf; in_addr_t *addr; ngx_str_t *value; struct hostent *h; value = cf->args->elts; /* AF_INET only */ if (!(addr = ngx_push_array(&ecf->debug_connection))) { return NGX_CONF_ERROR; } *addr = inet_addr((char *) value[1].data); if (*addr != INADDR_NONE) { return NGX_OK; } h = gethostbyname((char *) value[1].data); if (h == NULL || h->h_addr_list[0] == NULL) { ngx_conf_log_error(NGX_LOG_EMERG, cf, 0, "host %s not found", value[1].data); return NGX_CONF_ERROR; } *addr = *(in_addr_t *)(h->h_addr_list[0]); #else ngx_conf_log_error(NGX_LOG_WARN, cf, 0, "\"debug_connection\" is ignored, you need to rebuild " "nginx using --with-debug option to enable it"); #endif return NGX_OK; } static void *ngx_event_create_conf(ngx_cycle_t *cycle) { ngx_event_conf_t *ecf; ngx_test_null(ecf, ngx_palloc(cycle->pool, sizeof(ngx_event_conf_t)), NGX_CONF_ERROR); ecf->connections = NGX_CONF_UNSET_UINT; ecf->use = NGX_CONF_UNSET; ecf->multi_accept = NGX_CONF_UNSET; ecf->accept_mutex = NGX_CONF_UNSET; ecf->accept_mutex_delay = NGX_CONF_UNSET_MSEC; ecf->name = (void *) NGX_CONF_UNSET; #if (NGX_DEBUG) ngx_init_array(ecf->debug_connection, cycle->pool, 5, sizeof(in_addr_t), NGX_CONF_ERROR); #endif return ecf; } static char *ngx_event_init_conf(ngx_cycle_t *cycle, void *conf) { ngx_event_conf_t *ecf = conf; #if (HAVE_KQUEUE) ngx_conf_init_unsigned_value(ecf->connections, DEFAULT_CONNECTIONS); ngx_conf_init_value(ecf->use, ngx_kqueue_module.ctx_index); ngx_conf_init_ptr_value(ecf->name, ngx_kqueue_module_ctx.name->data); #elif (HAVE_DEVPOLL) ngx_conf_init_unsigned_value(ecf->connections, DEFAULT_CONNECTIONS); ngx_conf_init_value(ecf->use, ngx_devpoll_module.ctx_index); ngx_conf_init_ptr_value(ecf->name, ngx_devpoll_module_ctx.name->data); #elif (HAVE_EPOLL) ngx_conf_init_unsigned_value(ecf->connections, DEFAULT_CONNECTIONS); ngx_conf_init_value(ecf->use, ngx_epoll_module.ctx_index); ngx_conf_init_ptr_value(ecf->name, ngx_epoll_module_ctx.name->data); #elif (HAVE_SELECT) ngx_conf_init_unsigned_value(ecf->connections, FD_SETSIZE < DEFAULT_CONNECTIONS ? FD_SETSIZE : DEFAULT_CONNECTIONS); ngx_conf_init_value(ecf->use, ngx_select_module.ctx_index); ngx_conf_init_ptr_value(ecf->name, ngx_select_module_ctx.name->data); #else ngx_int_t i, m; ngx_event_module_t *module; m = -1; module = NULL; for (i = 0; ngx_modules[i]; i++) { if (ngx_modules[i]->type == NGX_EVENT_MODULE) { module = ngx_modules[i]->ctx; if (ngx_strcmp(module->name->data, event_core_name.data) == 0) { continue; } m = ngx_modules[i]->ctx_index; break; } } if (m == -1) { ngx_log_error(NGX_LOG_EMERG, cycle->log, 0, "no events module found"); return NGX_CONF_ERROR; } ngx_conf_init_value(ecf->connections, DEFAULT_CONNECTIONS); ngx_conf_init_value(ecf->use, m); ngx_conf_init_ptr_value(ecf->name, module->name->data); #endif cycle->connection_n = ecf->connections; ngx_conf_init_value(ecf->multi_accept, 0); ngx_conf_init_value(ecf->accept_mutex, 1); ngx_conf_init_msec_value(ecf->accept_mutex_delay, 500); return NGX_CONF_OK; }