ithewei · ithewei · Sep 25, 2026 · Sep 25, 2026 · Sep 25, 2026
diff --git a/docs/cn/hloop.md b/docs/cn/hloop.md
@@ -1,7 +1,7 @@
 事件循环和IO多路复用机制介绍
 
 事件循环是`libevent、libev、libuv、libhv`这类网络库里最核心的概念，即在事件循环里处理IO读写事件、定时器事件、自定义事件等各种事件；<br>
-IO多路复用即在一个IO线程监听多个fd，如最早期的`select`、后来的`poll`，`linux的epoll`、`windows的iocp`、`bsd的kqueue`、`solaris的port`等，都属于IO多路复用机制。<br>
+IO多路复用即在一个IO线程监听多个fd，如最早期的`select`、后来的`poll`，`linux的epoll`、`windows的wepoll/WSAPoll`、`bsd的kqueue`、`solaris的port`等，都属于IO多路复用机制。<br>
 非阻塞NIO搭配IO多路复用机制就是高并发的钥匙。<br>
 `libhv`下的`event`模块正是封装了多种平台的IO多路复用机制，提供了统一的事件接口，是`libhv`的核心模块。<br>
 

diff --git a/event/README.md b/event/README.md
@@ -14,12 +14,11 @@
 ├── iowatcher.h IO多路复用统一抽象接口
 ├── select.c    EVENT_SELECT实现
 ├── poll.c      EVENT_POLL实现
-├── epoll.c     EVENT_EPOLL实现 (for OS_LINUX)
+├── epoll.c     EVENT_EPOLL实现 (for OS_LINUX/OS_WIN with wepoll)
+├── wepoll/     Windows epoll兼容实现
 ├── io_uring.c  EVENT_IO_URING实现 (for OS_LINUX, with liburing)
-├── iocp.c      EVENT_IOCP实现  (for OS_WIN)
 ├── kqueue.c    EVENT_KQUEUE实现(for OS_BSD/OS_MAC)
 ├── evport.c    EVENT_PORT实现  (for OS_SOLARIS)
-├── nio.c       非阻塞IO
-└── overlapio.c 重叠IO
+└── nio.c       非阻塞IO
 
 ```
diff --git a/event/hevent.c b/event/hevent.c
@@ -88,7 +88,7 @@ void hio_ready(hio_t* io) {
     io->ready = 1;
     io->connected = 0;
     io->closed = 0;
-    io->accept = io->connect = io->connectex = 0;
+    io->accept = io->connect = 0;
     io->recv = io->send = 0;
     io->recvfrom = io->sendto = 0;
     io->close = 0;
@@ -146,10 +146,6 @@ void hio_ready(hio_t* io) {
 #if defined(EVENT_POLL) || defined(EVENT_KQUEUE)
     io->event_index[0] = io->event_index[1] = -1;
 #endif
-#ifdef EVENT_IOCP
-    io->hovlp = NULL;
-#endif
-
     // io_type
     fill_io_type(io);
     if (io->io_type & HIO_TYPE_SOCKET) {

diff --git a/event/hevent.h b/event/hevent.h
@@ -140,7 +140,6 @@ struct hio_s {
     unsigned    closed      :1;
     unsigned    accept      :1;
     unsigned    connect     :1;
-    unsigned    connectex   :1; // for ConnectEx/DisconnectEx
     unsigned    recv        :1;
     unsigned    send        :1;
     unsigned    recvfrom    :1;
@@ -213,10 +212,6 @@ struct hio_s {
     int         event_index[2]; // for poll,kqueue
 #endif
 
-#ifdef EVENT_IOCP
-    void*       hovlp;          // for iocp/overlapio
-#endif
-
 #if WITH_RUDP
     rudp_t          rudp;
 #if WITH_KCP

diff --git a/event/hloop.c b/event/hloop.c
@@ -805,8 +805,6 @@ const char* hio_engine() {
     return  "epoll";
 #elif defined(EVENT_KQUEUE)
     return  "kqueue";
-#elif defined(EVENT_IOCP)
-    return  "iocp";
 #elif defined(EVENT_PORT)
     return  "evport";
 #elif defined(EVENT_IO_URING)

diff --git a/event/hloop.h b/event/hloop.h
@@ -252,8 +252,6 @@ const char* hio_engine() {
     return  "epoll";
 #elif defined(EVENT_KQUEUE)
     return  "kqueue";
-#elif defined(EVENT_IOCP)
-    return  "iocp";
 #elif defined(EVENT_PORT)
     return  "evport";
 #elif defined(EVENT_IO_URING)

diff --git a/event/iocp.c b/event/iocp.c
diff --git a/event/iowatcher.h b/event/iowatcher.h
@@ -8,7 +8,6 @@
     !defined(EVENT_POLL) &&     \
     !defined(EVENT_EPOLL) &&    \
     !defined(EVENT_KQUEUE) &&   \
-    !defined(EVENT_IOCP) &&     \
     !defined(EVENT_PORT) &&     \
     !defined(EVENT_IO_URING) && \
     !defined(EVENT_NOEVENT)

diff --git a/event/nio.c b/event/nio.c
@@ -1,5 +1,4 @@
 #include "iowatcher.h"
-#ifndef EVENT_IOCP
 #include "hevent.h"
 #include "hsocket.h"
 #include "hssl.h"
@@ -635,4 +634,3 @@ int hio_close (hio_t* io) {
     }
     return 0;
 }
-#endif