diff --git a/src/event/modules/ngx_aio_module.c b/src/event/modules/ngx_aio_module.c
new file mode 100644
index 0000000..939c5c0
--- /dev/null
+++ b/src/event/modules/ngx_aio_module.c
@@ -0,0 +1,37 @@
+
+int ngx_posix_aio_process_events(ngx_log_t *log)
+{
+    unmask signal
+
+    listen via signal;
+
+    aio_suspend()/aiowait()/aio_waitcomplete();
+
+    mask signal
+
+    if (ngx_socket_errno == NGX_EINTR)
+        look listen
+        select()/accept() nb listen sockets
+    else
+        aio
+}
+
+int ngx_posix_aio_process_events(ngx_log_t *log)
+{
+    unmask signal
+
+    /* BUG: signal can be delivered before select() */
+
+    select(listen);
+
+    mask signal
+
+    if (ngx_socket_errno == NGX_EINTR)
+        look ready array
+}
+
+void aio_sig_handler(int signo, siginfo_t *siginfo, void *context)
+{
+    push siginfo->si_value.sival_ptr
+}
+
diff --git a/src/event/modules/ngx_kqueue_module.c b/src/event/modules/ngx_kqueue_module.c
new file mode 100644
index 0000000..54e9474
--- /dev/null
+++ b/src/event/modules/ngx_kqueue_module.c
@@ -0,0 +1,240 @@
+/*
+ * Copyright (C) 2002 Igor Sysoev, http://sysoev.ru
+ */
+
+/*
+    NEED ? : unify change_list and event_list:
+       event_list = change_list;
+*/
+
+#include <ngx_config.h>
+#include <ngx_types.h>
+#include <ngx_log.h>
+#include <ngx_connection.h>
+#include <ngx_event.h>
+#include <ngx_kqueue_module.h>
+
+#if (USE_KQUEUE) && !(HAVE_KQUEUE)
+#error "kqueue is not supported on this platform"
+#endif
+
+static void ngx_add_timer(ngx_event_t *ev, u_int timer);
+static void ngx_inline ngx_del_timer(ngx_event_t *ev);
+
+
+static int              kq;
+static struct kevent   *change_list, *event_list;
+static int              nchanges, nevents;
+
+static ngx_event_t      timer_queue;
+
+void ngx_kqueue_init(int max_connections, ngx_log_t *log)
+{
+    int size = sizeof(struct kevent) * 512;
+
+    nchanges = 0;
+    nevents = 512;
+
+    if ((kq = kqueue()) == -1)
+        ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,
+                      "ngx_kqueue_init: kqueue failed");
+
+    change_list = ngx_alloc(size, log);
+    event_list = ngx_alloc(size, log);
+
+    timer_queue.timer_prev = &timer_queue;
+    timer_queue.timer_next = &timer_queue;
+
+#if !(USE_KQUEUE)
+    ngx_event_actions.add = ngx_kqueue_add_event;
+    ngx_event_actions.del = ngx_kqueue_del_event;
+    ngx_event_actions.process = ngx_kqueue_process_events;
+#endif
+
+}
+
+int ngx_kqueue_add_event(ngx_event_t *ev, int event, u_int flags)
+{
+    if (event == NGX_TIMER_EVENT) {
+        ngx_add_timer(ev, flags);
+        return 0;
+    }
+
+    return ngx_kqueue_set_event(ev, event, EV_ADD | flags);
+}
+
+int ngx_kqueue_del_event(ngx_event_t *ev, int event)
+{
+    if (event == NGX_TIMER_EVENT) {
+        ngx_del_timer(ev);
+        return 0;
+    }
+
+    return ngx_kqueue_set_event(ev, event, EV_DELETE);
+}
+
+int ngx_kqueue_set_event(ngx_event_t *ev, int filter, u_int flags)
+{
+    struct timespec  ts = { 0, 0 };
+    ngx_connection_t *cn = (ngx_connection_t *) ev->data;
+
+    ngx_log_debug(ev->log, "ngx_kqueue_set_event: %d: ft:%d f:%08x" _
+                  cn->fd _ filter _ flags);
+
+    if (nchanges >= nevents) {
+        ngx_log_error(NGX_LOG_WARN, ev->log, 0,
+                      "ngx_kqueue_set_event: change list is filled up");
+
+        if (kevent(kq, change_list, nchanges, NULL, 0, &ts) == -1) {
+            ngx_log_error(NGX_LOG_ALERT, ev->log, ngx_errno,
+                          "ngx_kqueue_set_event: kevent failed");
+            return -1;
+        }
+        nchanges = 0;
+    }
+
+    change_list[nchanges].ident = cn->fd;
+    change_list[nchanges].filter = filter;
+    change_list[nchanges].flags = flags;
+    change_list[nchanges].fflags = 0;
+    change_list[nchanges].data = 0;
+    change_list[nchanges].udata = ev;
+    nchanges++;
+
+    return 0;
+}
+
+int ngx_kqueue_process_events(ngx_log_t *log)
+{
+    int              events, i;
+    u_int            timer = 0, delta = 0;
+    ngx_event_t      *ev, *nx;
+    struct timeval   tv;
+    struct timespec  ts, *tp = NULL;
+
+    if (timer_queue.timer_next != &timer_queue) {
+        timer = timer_queue.timer_next->timer_delta;
+        ts.tv_sec = timer / 1000;
+        ts.tv_nsec = (timer % 1000) * 1000000;
+        tp = &ts;
+        gettimeofday(&tv, NULL);
+        delta = tv.tv_sec * 1000 + tv.tv_usec / 1000;
+    }
+
+    ngx_log_debug(log, "ngx_kqueue_process_events: timer: %d" _ timer);
+
+    if ((events = kevent(kq, change_list, nchanges, event_list, nevents, tp))
+                == -1) {
+        ngx_log_error(NGX_LOG_ALERT, log, ngx_errno,
+                      "ngx_kqueue_process_events: kevent failed");
+        return -1;
+    }
+
+    nchanges = 0;
+
+    if (timer) {
+        gettimeofday(&tv, NULL);
+        delta = tv.tv_sec * 1000 + tv.tv_usec / 1000 - delta;
+
+    } else {
+        ngx_assert((events != 0), return -1, log,
+                   "ngx_kqueue_process_events: "
+                   "kevent returns no events without timeout");
+    }
+
+    ngx_log_debug(log, "ngx_kqueue_process_events: "
+                       "timer: %d, delta: %d" _ timer _ delta);
+
+    if (timer) {
+        if (delta >= timer) {
+            for (ev = timer_queue.timer_next;
+                 ev != &timer_queue && delta >= ev->timer_delta;
+                 /* void */)
+            {
+                delta -= ev->timer_delta;
+                nx = ev->timer_next;
+                ngx_del_timer(ev);
+                if (ev->timer_handler(ev) == -1)
+                    ev->close_handler(ev);
+                ev = nx;
+            }
+
+        } else {
+           timer_queue.timer_next->timer_delta -= delta;
+        }
+    }
+
+    for (i = 0; i < events; i++) {
+
+        ngx_log_debug(log, "ngx_kqueue_process_events: kevent: "
+                      "%d: ft:%d f:%08x ff:%08x d:%d ud:%08x" _
+                      event_list[i].ident _ event_list[i].filter _
+                      event_list[i].flags _ event_list[i].fflags _
+                      event_list[i].data _ event_list[i].udata);
+
+        if (event_list[i].flags & EV_ERROR) {
+            ngx_log_error(NGX_LOG_ALERT, log, event_list[i].data,
+                          "ngx_kqueue_process_events: kevent error");
+            continue;
+        }
+
+        ev = (ngx_event_t *) event_list[i].udata;
+
+        switch (event_list[i].filter) {
+
+        case EVFILT_READ:
+        case EVFILT_WRITE:
+            ev->ready = 1;
+            ev->available = event_list[i].data;
+
+            if (event_list[i].flags & EV_EOF) {
+                ev->eof = 1;
+                ev->error = event_list[i].fflags;
+            }
+
+            if (ev->event_handler(ev) == -1)
+                ev->close_handler(ev);
+
+            break;
+
+        default:
+            ngx_assert(0, /* void */, log,
+                       "ngx_kqueue_process_events: unknown filter %d" _
+                       event_list[i].filter);
+        }
+    }
+
+    return 0;
+}
+
+static void ngx_add_timer(ngx_event_t *ev, u_int timer)
+{
+    ngx_event_t *e;
+
+    for (e = timer_queue.timer_next;
+         e != &timer_queue && timer > e->timer_delta;
+         e = e->timer_next)
+        timer -= e->timer_delta;
+
+    ev->timer_delta = timer;
+
+    ev->timer_next = e;
+    ev->timer_prev = e->timer_prev;
+
+    e->timer_prev->timer_next = ev;
+    e->timer_prev = ev;
+}
+
+static void ngx_inline ngx_del_timer(ngx_event_t *ev)
+{
+    if (ev->timer_prev)
+        ev->timer_prev->timer_next = ev->timer_next;
+
+    if (ev->timer_next) {
+        ev->timer_next->timer_prev = ev->timer_prev;
+        ev->timer_prev = NULL;
+    }
+
+    if (ev->timer_prev)
+        ev->timer_next = NULL;
+}
diff --git a/src/event/modules/ngx_kqueue_module.h b/src/event/modules/ngx_kqueue_module.h
new file mode 100644
index 0000000..38509a0
--- /dev/null
+++ b/src/event/modules/ngx_kqueue_module.h
@@ -0,0 +1,16 @@
+#ifndef _NGX_KQUEUE_MODULE_H_INCLUDED_
+#define _NGX_KQUEUE_MODULE_H_INCLUDED_
+
+
+#include <ngx_types.h>
+#include <ngx_log.h>
+#include <ngx_event.h>
+
+void ngx_kqueue_init(int max_connections, ngx_log_t *log);
+int ngx_kqueue_add_event(ngx_event_t *ev, int event, u_int flags);
+int ngx_kqueue_del_event(ngx_event_t *ev, int event);
+int ngx_kqueue_set_event(ngx_event_t *ev, int filter, u_int flags);
+int ngx_kqueue_process_events(ngx_log_t *log);
+
+
+#endif /* _NGX_KQUEUE_MODULE_H_INCLUDED_ */
diff --git a/src/event/modules/ngx_overlapped_module.c b/src/event/modules/ngx_overlapped_module.c
new file mode 100644
index 0000000..2bb4d7f
--- /dev/null
+++ b/src/event/modules/ngx_overlapped_module.c
@@ -0,0 +1,17 @@
+
+int ngx_overlapped_process_events(ngx_log_t *log)
+{
+    if (acceptex)
+        event = SleepEx(timer, 1);
+    else
+        event = WSAWaitForMultipleEvents(n_events, events, 0, timer, 1);
+
+    if (event == WSA_IO_COMPLETION)
+        look ready array
+}
+
+void CALLBACK overlapped_completion_procedure(DWORD error, DWORD nbytes,
+                         LPWSAOVERLAPPED overlapped, DWORD flags)
+{
+    push overlapped;
+}
diff --git a/src/event/modules/ngx_select_module.c b/src/event/modules/ngx_select_module.c
new file mode 100644
index 0000000..6c9e8f3
--- /dev/null
+++ b/src/event/modules/ngx_select_module.c
@@ -0,0 +1,349 @@
+
+#include <ngx_config.h>
+#include <ngx_types.h>
+#include <ngx_log.h>
+#include <ngx_time.h>
+#include <ngx_connection.h>
+#include <ngx_event.h>
+#include <ngx_select_module.h>
+
+static fd_set       master_read_fds;
+static fd_set       master_write_fds;
+static fd_set       work_read_fds;
+static fd_set       work_write_fds;
+
+#if (WIN32)
+static int          max_read;
+static int          max_write;
+#else
+static int          max_fd;
+#endif
+
+static ngx_event_t  event_queue;
+static ngx_event_t  timer_queue;
+
+
+static void ngx_add_timer(ngx_event_t *ev, u_int timer);
+static void ngx_inline ngx_del_timer(ngx_event_t *ev);
+
+static fd_set *ngx_select_get_fd_set(ngx_socket_t fd, int event,
+                                     ngx_log_t *log);
+
+void ngx_select_init(int max_connections, ngx_log_t *log)
+{
+#if (WIN32)
+    if (max_connections > FD_SETSIZE)
+        ngx_log_error(NGX_LOG_EMERG, log, 0,
+                      "ngx_select_init: maximum number of descriptors "
+                      "supported by select() is %d",
+                      FD_SETSIZE);
+#else
+    if (max_connections >= FD_SETSIZE)
+        ngx_log_error(NGX_LOG_EMERG, log, 0,
+                      "ngx_select_init: maximum descriptor number"
+                      "supported by select() is %d",
+                      FD_SETSIZE - 1);
+#endif
+
+    FD_ZERO(&master_read_fds);
+    FD_ZERO(&master_write_fds);
+
+    event_queue.prev = &event_queue;
+    event_queue.next = &event_queue;
+
+    timer_queue.timer_prev = &timer_queue;
+    timer_queue.timer_next = &timer_queue;
+
+    ngx_event_actions.add = ngx_select_add_event;
+    ngx_event_actions.del = ngx_select_del_event;
+    ngx_event_actions.process = ngx_select_process_events;
+
+#if (WIN32)
+    max_read = max_write = 0;
+#else
+    max_fd = -1;
+#endif
+}
+
+int ngx_select_add_event(ngx_event_t *ev, int event, u_int flags)
+{
+    fd_set *fds;
+    ngx_connection_t *cn = (ngx_connection_t *) ev->data;
+
+    if (event == NGX_TIMER_EVENT) {
+        ngx_add_timer(ev, flags);
+        return 0;
+    }
+
+    ngx_assert((flags != NGX_ONESHOT_EVENT), return -1, ev->log,
+               "ngx_select_add_event: NGX_ONESHOT_EVENT is not supported");
+
+    fds = ngx_select_get_fd_set(cn->fd, event, ev->log);
+    if (fds == NULL)
+        return -1;
+
+    ev->prev = &event_queue;
+    ev->next = event_queue.next;
+    event_queue.next->prev = ev;
+    event_queue.next = ev;
+
+    FD_SET(cn->fd, fds);
+
+#if (WIN32)
+    switch (event) {
+    case NGX_READ_EVENT:
+        max_read++;
+        break;
+    case NGX_WRITE_EVENT:
+        max_write++;
+        break;
+    }
+#else
+    if (max_fd != -1 && max_fd < cn->fd)
+        max_fd = cn->fd;
+#endif
+
+    return 0;
+}
+
+int ngx_select_del_event(ngx_event_t *ev, int event)
+{
+    fd_set *fds;
+    ngx_connection_t *cn = (ngx_connection_t *) ev->data;
+
+    if (event == NGX_TIMER_EVENT) {
+        ngx_del_timer(ev);
+        return 0;
+    }
+
+    fds = ngx_select_get_fd_set(cn->fd, event, ev->log);
+    if (fds == NULL)
+        return -1;
+
+    if (ev->prev)
+        ev->prev->next = ev->next;
+
+    if (ev->next) {
+        ev->next->prev = ev->prev;
+        ev->prev = NULL;
+    }
+
+    if (ev->prev)
+        ev->next = NULL;
+
+    FD_CLR(cn->fd, fds);
+
+#if (WIN32)
+    switch (event) {
+    case NGX_READ_EVENT:
+        max_read--;
+        break;
+    case NGX_WRITE_EVENT:
+        max_write--;
+        break;
+    }
+#else
+    if (max_fd == cn->fd)
+        max_fd = -1;
+#endif
+
+    return 0;
+}
+
+static fd_set *ngx_select_get_fd_set(ngx_socket_t fd, int event, ngx_log_t *log)
+{
+    ngx_log_debug(log, "ngx_select_get_fd_set: %d %d" _ fd _ event);
+
+#if !(WIN32)
+    if (fd >= FD_SETSIZE) {
+        ngx_log_error(NGX_LOG_ERR, log, 0,
+                      "ngx_select_get_event: maximum descriptor number"
+                      "supported by select() is %d",
+                      FD_SETSIZE - 1);
+        return NULL;
+    }
+#endif
+
+    switch (event) {
+    case NGX_READ_EVENT:
+#if (WIN32)
+        if (max_read >= FD_SETSIZE) {
+            ngx_log_error(NGX_LOG_ERR, log, 0,
+                          "ngx_select_get_event: maximum number of descriptors "
+                          "supported by select() is %d",
+                          FD_SETSIZE);
+            return NULL;
+        }
+#endif
+        return &master_read_fds;
+
+    case NGX_WRITE_EVENT:
+#if (WIN32)
+        if (max_write >= FD_SETSIZE) {
+            ngx_log_error(NGX_LOG_ERR, log, 0,
+                          "ngx_select_get_event: maximum number of descriptors "
+                          "supported by select() is %d",
+                          FD_SETSIZE);
+            return NULL;
+        }
+#endif
+        return &master_write_fds;
+
+    default:
+        ngx_assert(0, return NULL, log,
+                      "ngx_select_get_fd_set: invalid event %d" _ event);
+    }
+
+    return NULL;
+}
+
+int ngx_select_process_events(ngx_log_t *log)
+{
+    int                ready, found;
+    u_int              timer, delta;
+    ngx_event_t       *ev, *nx;
+    ngx_connection_t  *cn;
+    struct timeval     tv, *tp;
+
+    work_read_fds = master_read_fds;
+    work_write_fds = master_write_fds;
+
+    if (timer_queue.timer_next != &timer_queue) {
+        timer = timer_queue.timer_next->timer_delta;
+        tv.tv_sec = timer / 1000;
+        tv.tv_usec = (timer % 1000) * 1000;
+        tp = &tv;
+
+        delta = ngx_msec();
+
+    } else {
+        timer = 0;
+        tp = NULL;
+        delta = 0;
+    }
+
+#if !(WIN32)
+    if (max_fd == -1) {
+        for (ev = event_queue.next; ev != &event_queue; ev = ev->next) {
+            cn = (ngx_connection_t *) ev->data;
+            if (max_fd < cn->fd)
+                max_fd = cn->fd;
+        }
+
+        ngx_log_debug(log, "ngx_select_process_events: change max_fd: %d" _
+                      max_fd);
+    }
+#endif
+
+    ngx_log_debug(log, "ngx_select_process_events: timer: %d" _ timer);
+
+#if (WIN32)
+    if ((ready = select(0, &work_read_fds, &work_write_fds, NULL, tp))
+#else
+    if ((ready = select(max_fd + 1, &work_read_fds, &work_write_fds, NULL, tp))
+#endif
+               == -1) {
+        ngx_log_error(NGX_LOG_ALERT, log, ngx_socket_errno,
+                     "ngx_select_process_events: select failed");
+        return -1;
+    }
+
+    ngx_log_debug(log, "ngx_select_process_events: ready %d" _ ready);
+
+    if (timer) {
+        delta = ngx_msec() - delta;
+
+    } else {
+        ngx_assert((ready != 0), return -1, log,
+                   "ngx_select_process_events: "
+                   "select returns no events without timeout");
+    }
+
+    ngx_log_debug(log, "ngx_select_process_events: "
+                       "timer: %d, delta: %d" _ timer _ delta);
+
+    if (timer) {
+        if (delta >= timer) {
+            for (ev = timer_queue.timer_next;
+                 ev != &timer_queue && delta >= ev->timer_delta;
+                 /* void */)
+            {
+                delta -= ev->timer_delta;
+                nx = ev->timer_next;
+                ngx_del_timer(ev);
+                if (ev->timer_handler(ev) == -1)
+                    ev->close_handler(ev);
+                ev = nx;
+            }
+
+        } else {
+           timer_queue.timer_next->timer_delta -= delta;
+        }
+    }
+
+    for (ev = event_queue.next; ev != &event_queue; ev = ev->next) {
+        cn = (ngx_connection_t *) ev->data;
+        found = 0;
+
+        if (ev->write) {
+            if (FD_ISSET(cn->fd, &work_write_fds)) {
+                ngx_log_debug(log, "ngx_select_process_events: write %d" _
+                              cn->fd);
+                found = 1;
+            }
+
+        } else {
+            if (FD_ISSET(cn->fd, &work_read_fds)) {
+                ngx_log_debug(log, "ngx_select_process_events: read %d" _
+                              cn->fd);
+                found = 1;
+            }
+        }
+
+        if (found) {
+            ev->ready = 1;
+            if (ev->event_handler(ev) == -1)
+                ev->close_handler(ev);
+
+            ready--;
+        }
+
+    }
+
+    ngx_assert((ready == 0), return 0, log,
+               "ngx_select_process_events: ready != events");
+
+    return 0;
+}
+
+static void ngx_add_timer(ngx_event_t *ev, u_int timer)
+{
+    ngx_event_t *e;
+
+    for (e = timer_queue.timer_next;
+         e != &timer_queue && timer > e->timer_delta;
+         e = e->timer_next)
+        timer -= e->timer_delta;
+
+    ev->timer_delta = timer;
+
+    ev->timer_next = e;
+    ev->timer_prev = e->timer_prev;
+
+    e->timer_prev->timer_next = ev;
+    e->timer_prev = ev;
+}
+
+static void ngx_inline ngx_del_timer(ngx_event_t *ev)
+{
+    if (ev->timer_prev)
+        ev->timer_prev->timer_next = ev->timer_next;
+
+    if (ev->timer_next) {
+        ev->timer_next->timer_prev = ev->timer_prev;
+        ev->timer_prev = NULL;
+    }
+
+    if (ev->timer_prev)
+        ev->timer_next = NULL;
+}
diff --git a/src/event/modules/ngx_select_module.h b/src/event/modules/ngx_select_module.h
new file mode 100644
index 0000000..6516981
--- /dev/null
+++ b/src/event/modules/ngx_select_module.h
@@ -0,0 +1,16 @@
+#ifndef _NGX_SELECT_MODULE_H_INCLUDED_
+#define _NGX_SELECT_MODULE_H_INCLUDED_
+
+
+#include <ngx_types.h>
+#include <ngx_log.h>
+#include <ngx_event.h>
+
+void ngx_select_init(int max_connections, ngx_log_t *log);
+int ngx_select_add_event(ngx_event_t *ev, int event, u_int flags);
+int ngx_select_del_event(ngx_event_t *ev, int event);
+int ngx_select_set_event(ngx_event_t *ev, int filter, u_int flags);
+int ngx_select_process_events(ngx_log_t *log);
+
+
+#endif /* _NGX_SELECT_MODULE_H_INCLUDED_ */