new file mode 100644
--- /dev/null
+++ b/src/event/ngx_event.c
@@ -0,0 +1,805 @@
+
+/*
+ * Copyright (C) Igor Sysoev
+ */
+
+
+#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_RTSIG)
+extern ngx_module_t ngx_rtsig_module;
+extern ngx_event_module_t ngx_rtsig_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 char *ngx_accept_mutex_check(ngx_conf_t *cf, void *post, void *data);
+
+
+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;
+
+
+#if (NGX_STAT_STUB)
+
+ngx_atomic_t   ngx_stat_accepted0;
+ngx_atomic_t  *ngx_stat_accepted = &ngx_stat_accepted0;
+ngx_atomic_t   ngx_stat_requests0;
+ngx_atomic_t  *ngx_stat_requests = &ngx_stat_requests0;
+ngx_atomic_t   ngx_stat_active0;
+ngx_atomic_t  *ngx_stat_active = &ngx_stat_active0;
+ngx_atomic_t   ngx_stat_reading0;
+ngx_atomic_t  *ngx_stat_reading = &ngx_stat_reading0;
+ngx_atomic_t   ngx_stat_writing0;
+ngx_atomic_t  *ngx_stat_writing = &ngx_stat_reading0;
+
+#endif
+
+
+
+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 process */
+};
+
+
+static ngx_str_t  event_core_name = ngx_string("event_core");
+
+static ngx_conf_post_t  ngx_accept_mutex_post = { ngx_accept_mutex_check } ;
+
+
+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),
+      &ngx_accept_mutex_post },
+
+    { 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, 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 */
+
+#if (NGX_STAT_STUB)
+
+    size += 128           /* ngx_stat_accepted */
+           + 128          /* ngx_stat_requests */
+           + 128          /* ngx_stat_active */
+           + 128          /* ngx_stat_reading */
+           + 128;         /* ngx_stat_writing */
+
+#endif
+
+    if (!(shared = ngx_create_shared_memory(size, cycle->log))) {
+        return NGX_ERROR;
+    }
+
+    ngx_accept_mutex_ptr = (ngx_atomic_t *) shared;
+    ngx_connection_counter = (ngx_atomic_t *) (shared + 128);
+
+#if (NGX_STAT_STUB)
+
+    ngx_stat_accepted = (ngx_atomic_t *) (shared + 2 * 128);
+    ngx_stat_requests = (ngx_atomic_t *) (shared + 3 * 128);
+    ngx_stat_active = (ngx_atomic_t *) (shared + 4 * 128);
+    ngx_stat_reading = (ngx_atomic_t *) (shared + 5 * 128);
+    ngx_stat_writing = (ngx_atomic_t *) (shared + 6 * 128);
+
+#endif
+
+    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 = 0;
+        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;
+        c[i].data = NULL;
+#if (NGX_THREADS)
+        c[i].lock = 0;
+#endif
+    }
+
+    cycle->read_events = ngx_alloc(sizeof(ngx_event_t) * ecf->connections,
+                                   cycle->log);
+    if (cycle->read_events == NULL) {
+        return NGX_ERROR;
+    }
+
+    rev = cycle->read_events;
+    for (i = 0; i < cycle->connection_n; i++) {
+        rev[i].closed = 1;
+#if (NGX_THREADS)
+        rev[i].lock = &c[i].lock;
+        rev[i].own_lock = &c[i].lock;
+#endif
+    }
+
+    cycle->write_events = ngx_alloc(sizeof(ngx_event_t) * ecf->connections,
+                                   cycle->log);
+    if (cycle->write_events == NULL) {
+        return NGX_ERROR;
+    }
+
+    wev = cycle->write_events;
+    for (i = 0; i < cycle->connection_n; i++) {
+        wev[i].closed = 1;
+#if (NGX_THREADS)
+        wev[i].lock = &c[i].lock;
+        wev[i].own_lock = &c[i].lock;
+#endif
+    }
+
+    /* 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_accept_mutex) {
+            continue;
+        }
+
+        if (ngx_event_flags & NGX_USE_RTSIG_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_UINT) {
+        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_UINT;
+    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_RTSIG)
+    ngx_core_conf_t  *ccf;
+#endif
+
+#if (HAVE_KQUEUE)
+
+    ngx_conf_init_unsigned_value(ecf->connections, DEFAULT_CONNECTIONS);
+    ngx_conf_init_unsigned_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_unsigned_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_unsigned_value(ecf->use, ngx_epoll_module.ctx_index);
+    ngx_conf_init_ptr_value(ecf->name, ngx_epoll_module_ctx.name->data);
+
+#elif (HAVE_RTSIG)
+
+    ngx_conf_init_unsigned_value(ecf->connections, DEFAULT_CONNECTIONS);
+    ngx_conf_init_unsigned_value(ecf->use, ngx_rtsig_module.ctx_index);
+    ngx_conf_init_ptr_value(ecf->name, ngx_rtsig_module_ctx.name->data);
+
+#elif (HAVE_SELECT)
+
+#if (WIN32)
+    ngx_conf_init_unsigned_value(ecf->connections, DEFAULT_CONNECTIONS);
+#else
+    ngx_conf_init_unsigned_value(ecf->connections,
+          FD_SETSIZE < DEFAULT_CONNECTIONS ? FD_SETSIZE : DEFAULT_CONNECTIONS);
+#endif
+
+    ngx_conf_init_unsigned_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_unsigned_value(ecf->connections, DEFAULT_CONNECTIONS);
+
+    ngx_conf_init_unsigned_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);
+
+#if (HAVE_RTSIG)
+    if (ecf->use == ngx_rtsig_module.ctx_index && ecf->accept_mutex == 0) {
+        ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx,
+                                               ngx_core_module);
+        if (ccf->worker_processes) {
+            ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,
+                          "the \"rtsig\" method requires "
+                          "\"accept_mutex\" to be on");
+            return NGX_CONF_ERROR;
+        }
+    }
+#endif
+
+    return NGX_CONF_OK;
+}
+
+
+static char *ngx_accept_mutex_check(ngx_conf_t *cf, void *post, void *data)
+{
+#if !(NGX_HAVE_ATOMIC_OPS)
+
+    ngx_flag_t *fp = data;
+
+    *fp = 0;
+
+    ngx_conf_log_error(NGX_LOG_WARN, cf, 0,
+                       "\"accept_mutex\" is not supported, ignored");
+
+#endif
+
+    return NGX_CONF_OK;
+}