diff --git a/mw/has_task_msg_manager/has_task_msg.h b/mw/has_task_msg_manager/has_task_msg.h
index c974b14..428c8de 100644
--- a/mw/has_task_msg_manager/has_task_msg.h
+++ b/mw/has_task_msg_manager/has_task_msg.h
@@ -40,13 +40,18 @@ typedef enum {
  */
 typedef int (*has_msg_handle_cb)(unsigned char module_id, const unsigned char *buf, unsigned int len);
 
+
+/* -------------------- 注意 Attention -------------------- */
+/* 对于同一个id,不能同时在不同线程中调用 *_handle*, *_receive* 和 *delete_all* 的接口 */
+/* For the same id, the *_handle*, *_receive* and *delete_all* API cannot be called in different threads at the same time */
+
 /* 基础功能 */
 int has_msg_init(void);
+int has_msg_os_init(void);
+
 int has_msg_init_module(has_module_ID_e module_id); // HAS OS调用
 int has_msg_publish(has_module_ID_e module_id, void *buffer, unsigned int length);
-int has_msg_handle(has_module_ID_e module_id, has_msg_handle_cb cb);
-
-int has_msg_os_init(void);
+int has_msg_handle(has_module_ID_e module_id, has_msg_handle_cb cb, int ms_timeout);
 
 unsigned int has_msg_is_message_empty(has_module_ID_e module_id);
 unsigned int has_msg_get_message_number(has_module_ID_e module_id);
@@ -54,9 +59,9 @@ int has_msg_delete_all_message(has_module_ID_e module_id);
 
 /* 扩展功能 */
 int has_msg_handle_by_module(has_module_ID_e module_id, has_msg_handle_cb cb, has_module_ID_e pub_module_id);
-int has_msg_handle_latest(has_module_ID_e module_id, has_msg_handle_cb cb);
-unsigned int has_msg_receive(has_module_ID_e module_id, unsigned char *pub_module_id, unsigned char *buf_out);
-unsigned int has_msg_receive_latest(has_module_ID_e module_id, unsigned char *pub_module_id, unsigned char *buf_out);
+int has_msg_handle_latest(has_module_ID_e module_id, has_msg_handle_cb cb, int ms_timeout);
+unsigned int has_msg_receive(has_module_ID_e module_id, unsigned char *pub_module_id, unsigned char *buf_out, int ms_timeout);
+unsigned int has_msg_receive_latest(has_module_ID_e module_id, unsigned char *pub_module_id, unsigned char *buf_out, int ms_timeout);
 int has_msg_printf_subscribe(has_module_ID_e module_id);
 // int has_msg_subscribe(has_module_ID_e module_id, has_module_ID_e sub_id);
 // int has_msg_unsubscribe(has_module_ID_e module_id, has_module_ID_e sub_id);
diff --git a/mw/has_task_msg_manager/has_task_msg_mamanger.c b/mw/has_task_msg_manager/has_task_msg_mamanger.c
index e8fe096..97a1b37 100644
--- a/mw/has_task_msg_manager/has_task_msg_mamanger.c
+++ b/mw/has_task_msg_manager/has_task_msg_mamanger.c
@@ -46,7 +46,7 @@ typedef struct {
 /* 静态发布列表 */
 typedef struct {
     unsigned char pub_module[MODULE_MAX - 1]; // 发布表
-#ifdef MSG_OPT_USE_MUTEX
+#ifdef MSG_OPT_MUTEX_SEM
     msg_mutex_t buffer_mutex; // 消息互斥量
 #endif
     unsigned char pub_num;
@@ -64,8 +64,9 @@ typedef struct {
     const unsigned char sub_module_cnt; // 订阅数量
     const unsigned char sub_module[MODULE_MAX - 1]; // 订阅表
 #endif
-#ifdef MSG_OPT_USE_MUTEX
+#ifdef MSG_OPT_MUTEX_SEM
     msg_mutex_t msg_mutex; // 消息互斥量
+    msg_sem_t sem;
 #endif
     struct list_head msg_list; // 消息链表
 } has_static_sub_list_t;
@@ -145,6 +146,9 @@ int has_msg_init()
         }
         msg_mutex_init(&g_sub_list[i].msg_mutex); // 初始化该模块互斥量
         INIT_LIST_HEAD(&g_sub_list[i].msg_list); // 初始化订阅链表
+#ifdef MSG_OPT_MUTEX_SEM
+        msg_sem_init(&g_sub_list[i].sem); // 初始化同步量
+#endif
     }
 #ifdef MSG_OPT_DEBUG
     // msg_printf("show index:\n");
@@ -234,6 +238,9 @@ int has_msg_init_module(has_module_ID_e module_id)
             }
             msg_mutex_init(&g_sub_list[i].msg_mutex); // 初始化该模块互斥量
             INIT_LIST_HEAD(&g_sub_list[i].msg_list); // 初始化订阅链表
+#ifdef MSG_OPT_MUTEX_SEM
+            msg_sem_init(&g_sub_list[i].sem); // 初始化同步量
+#endif
             break;
         }
     }
@@ -259,6 +266,27 @@ int has_msg_os_init()
     }
 }
 
+/* TODO:更合理的方式是每个消息一个互斥量，但是可能会导致每个消息malloc和free的时候频繁init和deinit */
+
+/* 检查计数判断该消息是否被所有订阅模块处理完，处理完就释放内存 */
+static inline void msg_check_and_free_message(has_msg_node_t *node)
+{
+    has_msg_node_t *temp = NULL;
+    unsigned char id = node->msg_buff->module_id;
+#ifdef MSG_OPT_MUTEX_SEM
+    msg_mutex_t *target_mutex = &g_pub_list[id].buffer_mutex;
+#endif
+    msg_mutex_lock(target_mutex);
+    node->msg_buff->node_cnt --;
+    if (node->msg_buff->node_cnt == 0) {
+        temp = ((has_msg_node_t *)node->msg_buff - g_pub_list[id].pub_num);
+    }
+    msg_mutex_unlock(target_mutex);
+    if (temp) {
+        msg_debug("free node addr:0x%p\n", temp);
+        msg_free(temp);
+    }
+}
 
 /**
  * @brief 发布一个消息
@@ -306,41 +334,31 @@ int has_msg_publish(has_module_ID_e module_id, void *buffer, unsigned int length
         node[i].msg_buff = msg_buffer;
         msg_mutex_lock(&g_sub_list[sub_index].msg_mutex);
         list_add_tail(&node[i].list, &g_sub_list[sub_index].msg_list); // 加入消息链表
+#ifdef MSG_OPT_MUTEX_SEM
+        /* 通知等待线程唤醒 */
+        if (msg_sem_notify(&g_sub_list[sub_index].sem) == -1) {
+            list_del(&node[i].list); // 添加失败，删除链表
+            msg_mutex_unlock(&g_sub_list[sub_index].msg_mutex);
+            msg_check_and_free_message(&node[i]);
+            msg_printf("warning:Failed to add msg on module:%d !!!\n"
+                , g_sub_list[sub_index].module_id);
+            continue;
+        }
+#endif
         msg_mutex_unlock(&g_sub_list[sub_index].msg_mutex);
     }
     return 0;
 }
 
-/* TODO:更合理的方式是每个消息一个互斥量，但是可能会导致每个消息malloc和free的时候频繁init和deinit */
-
-/* 检查计数判断该消息是否被所有订阅模块处理完，处理完就释放内存 */
-static inline void msg_check_and_free_message(has_msg_node_t *node)
-{
-    has_msg_node_t *temp = NULL;
-    unsigned char id = node->msg_buff->module_id;
-#ifdef MSG_OPT_USE_MUTEX
-    msg_mutex_t *target_mutex = &g_pub_list[id].buffer_mutex;
-#endif
-    msg_mutex_lock(target_mutex);
-    node->msg_buff->node_cnt --;
-    if (node->msg_buff->node_cnt == 0) {
-        temp = ((has_msg_node_t *)node->msg_buff - g_pub_list[id].pub_num);
-    }
-    msg_mutex_unlock(target_mutex);
-    if (temp) {
-        msg_debug("free node addr:0x%p\n", temp);
-        msg_free(temp);
-    }
-}
-
 /**
- * @brief 处理一个消息,先入先出
+ * @brief 处理一个消息,先入先出，(TODO:互斥)禁止在多个线程同时调用同一id的handle
  *
  * @param module_id:处理消息的模块id号
  * @param cb:消息处理回调
+ * @param ms_timeout:超时时间（ms）其中0：消息直接返回；-1：一直阻塞
  * @return 0:成功 -1：失败
  */
-int has_msg_handle(has_module_ID_e module_id, has_msg_handle_cb cb)
+int has_msg_handle(has_module_ID_e module_id, has_msg_handle_cb cb, int ms_timeout)
 {
     has_msg_node_t *node;
     has_static_sub_list_t *sub_list;
@@ -348,6 +366,12 @@ int has_msg_handle(has_module_ID_e module_id, has_msg_handle_cb cb)
 
     sub_list = &g_sub_list[g_sub_list_index[module_id]];
 
+#ifdef MSG_OPT_MUTEX_SEM
+    if (msg_sem_wait(&sub_list->sem, ms_timeout) != WAIT_MSG_COME) {
+        return -1; // 没有消息需要处理或发生错误
+    }
+#endif
+
     /* 处理一个消息，先入先出 */
     msg_mutex_lock(&sub_list->msg_mutex);
     if (!list_empty(&sub_list->msg_list)) {
@@ -392,6 +416,13 @@ int has_msg_handle_by_module(has_module_ID_e module_id, has_msg_handle_cb cb,
     if (!list_empty(&sub_list->msg_list)) {
         list_for_each_entry_safe(node, temp, &sub_list->msg_list, list) {
             if (node->msg_buff->module_id == pub_module_id) {
+#ifdef MSG_OPT_MUTEX_SEM
+                if (msg_sem_wait(&sub_list->sem, 0) != WAIT_MSG_COME) {
+                    msg_mutex_unlock(&sub_list->msg_mutex);
+                    msg_printf("error: list number != sem number\n");
+                    return -1; // eventfd和list不一致，理论上一定是 WAIT_MSG_COME
+                }
+#endif
                 list_del(&node->list);
                 break;
             }
@@ -419,7 +450,7 @@ int has_msg_handle_by_module(has_module_ID_e module_id, has_msg_handle_cb cb,
  * @param cb:消息处理回调
  * @return 0:成功 -1：失败
  */
-int has_msg_handle_latest(has_module_ID_e module_id, has_msg_handle_cb cb)
+int has_msg_handle_latest(has_module_ID_e module_id, has_msg_handle_cb cb, int ms_timeout)
 {
     has_msg_node_t *node;
     has_static_sub_list_t *sub_list;
@@ -427,6 +458,12 @@ int has_msg_handle_latest(has_module_ID_e module_id, has_msg_handle_cb cb)
 
     sub_list = &g_sub_list[g_sub_list_index[module_id]];
 
+#ifdef MSG_OPT_MUTEX_SEM
+    if (msg_sem_wait(&sub_list->sem, ms_timeout) != WAIT_MSG_COME) {
+        return -1; // 没有消息需要处理或发生错误
+    }
+#endif
+
     /* 处理最新的消息 */
     msg_mutex_lock(&sub_list->msg_mutex);
     if (!list_empty(&sub_list->msg_list)) {
@@ -451,7 +488,7 @@ int has_msg_handle_latest(has_module_ID_e module_id, has_msg_handle_cb cb)
 /* 将消息复制出接口处理，不建议使用 */
 #if 1
 unsigned int has_msg_receive(has_module_ID_e module_id, unsigned char *pub_module_id,
-    unsigned char *buf_out)
+    unsigned char *buf_out, int ms_timeout)
 {
     has_msg_node_t *node;
     has_static_sub_list_t *sub_list;
@@ -464,6 +501,12 @@ unsigned int has_msg_receive(has_module_ID_e module_id, unsigned char *pub_modul
 
     sub_list = &g_sub_list[g_sub_list_index[module_id]];
 
+#ifdef MSG_OPT_MUTEX_SEM
+    if (msg_sem_wait(&sub_list->sem, ms_timeout) != WAIT_MSG_COME) {
+        return 0; // 没有消息需要处理或发生错误
+    }
+#endif
+
     /* 处理一个消息，先入先出 */
     msg_mutex_lock(&sub_list->msg_mutex);
     if (!list_empty(&sub_list->msg_list)) {
@@ -486,7 +529,7 @@ unsigned int has_msg_receive(has_module_ID_e module_id, unsigned char *pub_modul
 }
 
 unsigned int has_msg_receive_latest(has_module_ID_e module_id, unsigned char *pub_module_id,
-    unsigned char *buf_out)
+    unsigned char *buf_out, int ms_timeout)
 {
     has_msg_node_t *node;
     has_static_sub_list_t *sub_list;
@@ -499,6 +542,12 @@ unsigned int has_msg_receive_latest(has_module_ID_e module_id, unsigned char *pu
 
     sub_list = &g_sub_list[g_sub_list_index[module_id]];
 
+#ifdef MSG_OPT_MUTEX_SEM
+    if (msg_sem_wait(&sub_list->sem, ms_timeout) != WAIT_MSG_COME) {
+        return 0; // 没有消息需要处理或发生错误
+    }
+#endif
+
     /* 处理最新的消息 */
     msg_mutex_lock(&sub_list->msg_mutex);
     if (!list_empty(&sub_list->msg_list)) {
@@ -529,9 +578,7 @@ unsigned int has_msg_receive_latest(has_module_ID_e module_id, unsigned char *pu
  */
 unsigned int has_msg_is_message_empty(has_module_ID_e module_id)
 {
-    has_msg_node_t *node, *temp;
     has_static_sub_list_t *sub_list;
-    unsigned int num = 0;
     MSG_CHECK_ID_AND_INDEX(module_id, -1);
 
     sub_list = &g_sub_list[g_sub_list_index[module_id]];
@@ -595,9 +642,8 @@ int has_msg_delete_all_message(has_module_ID_e module_id)
     has_msg_node_t *node, *temp;
     has_static_sub_list_t *sub_list;
     struct list_head free_list;
-    has_msg_node_t *free_temp;
-    unsigned char id;
     INIT_LIST_HEAD(&free_list);
+    int ret = 0;
     MSG_CHECK_ID_AND_INDEX(module_id, -1);
 
     sub_list = &g_sub_list[g_sub_list_index[module_id]];
@@ -605,6 +651,13 @@ int has_msg_delete_all_message(has_module_ID_e module_id)
     msg_mutex_lock(&sub_list->msg_mutex);
     if (!list_empty(&sub_list->msg_list)) {
         list_for_each_entry_safe(node, temp, &sub_list->msg_list, list) {
+#ifdef MSG_OPT_MUTEX_SEM
+            if (msg_sem_wait(&sub_list->sem, 0) != WAIT_MSG_COME) {
+                msg_printf("error: list number != sem number\n");
+                ret = -1;
+                continue; // eventfd和list不一致，理论上一定是 WAIT_MSG_COME
+            }
+#endif
             list_del(&node->list);
             list_add_tail(&node->list, &free_list); // 加入临时链表
         }
@@ -613,21 +666,9 @@ int has_msg_delete_all_message(has_module_ID_e module_id)
     msg_mutex_unlock(&sub_list->msg_mutex);
     /* 释放内存 */
 	list_for_each_entry_safe(node, temp, &free_list, list) {
-        /* msg_check_and_free_message(node); */
-        free_temp = NULL;
-        id = node->msg_buff->module_id;
-        msg_mutex_lock(&g_pub_list[id].buffer_mutex);
-        node->msg_buff->node_cnt --;
-        if (node->msg_buff->node_cnt == 0) {
-            free_temp = ((has_msg_node_t *)node->msg_buff - g_pub_list[id].pub_num);
-        }
-        msg_mutex_unlock(&g_pub_list[id].buffer_mutex);
-        if (free_temp) {
-            msg_debug("id:%d free addr:0x%p\n", module_id, free_temp);
-            msg_free(free_temp);
-        }
+        msg_check_and_free_message(node);
 	}
-    return 0;
+    return ret;
 }
 
 #ifdef MSG_OPT_DYNAMIC_SUB
diff --git a/mw/has_task_msg_manager/has_task_msg_os_port.c b/mw/has_task_msg_manager/has_task_msg_os_port.c
new file mode 100644
index 0000000..6a25b6a
--- /dev/null
+++ b/mw/has_task_msg_manager/has_task_msg_os_port.c
@@ -0,0 +1,102 @@
+/*
+ * has_task_msg_manager/has_task_os_port.c
+ *
+ * Author: zhangzhaopeng
+ * Version： 1.0
+ * Created on : 2026-01-05
+ * 系统适配层
+ */
+#include <stdint.h>
+#include "has_task_msg_os_port.h"
+
+#ifdef MSG_OPT_MUTEX_SEM
+/**
+ * @brief 信号量初始化
+ *
+ * @param sem:信号量
+ * @return 0:成功 -1：失败
+ */
+int msg_sem_init(msg_sem_t *sem)
+{
+#if (MSG_OPT_OS == MSG_OPT_OS_LINUX)
+    sem->poll_fd.fd =  eventfd(0, EFD_SEMAPHORE | EFD_NONBLOCK);
+    if (sem->poll_fd.fd == -1) {
+        printf("create eventfd error!\n");
+        return -1;
+    }
+    sem->poll_fd.events = POLLIN;  // 监控可读事件
+    sem->poll_fd.revents = 0;
+    return 0;
+#elif (MSG_OPT_OS == MSG_OPT_OS_freeRTOS)
+#elif (MSG_OPT_OS == MSG_OPT_OS_RT_THREAD)
+#elif (MSG_OPT_OS == MSG_OPT_OS_NONE_OR_OSAL)
+#elif (MSG_OPT_OS == MSG_OPT_OS_USER_DEFINED)
+#endif
+}
+
+/**
+ * @brief 消息通知
+ *
+ * @param sem:信号量
+ * @return 0:成功 -1：失败
+ */
+int msg_sem_notify(msg_sem_t *sem)
+{
+#if (MSG_OPT_OS == MSG_OPT_OS_LINUX)
+    uint64_t val = 1;
+    if (write(sem->poll_fd.fd, &val, sizeof(val)) != sizeof(val)) {
+        printf("notify thread err!\n");
+        return -1;
+    }
+    return 0;
+#elif (MSG_OPT_OS == MSG_OPT_OS_freeRTOS)
+#elif (MSG_OPT_OS == MSG_OPT_OS_RT_THREAD)
+#elif (MSG_OPT_OS == MSG_OPT_OS_NONE_OR_OSAL)
+#elif (MSG_OPT_OS == MSG_OPT_OS_USER_DEFINED)
+#endif
+}
+
+/**
+ * @brief 等待消息
+ *
+ * @param sem:信号量
+ * @param ms_timeout:超时时间（ms）其中0：消息直接返回；-1：一直阻塞
+ * @return MSG_WAIT_RET:
+ * WAIT_FAIL = -1, 等待失败
+ * WAIT_TIMEOUT = -1, 等待超时
+ * WAIT_MSG_COME = -1, 有新消息
+ */
+enum MSG_WAIT_RET msg_sem_wait(msg_sem_t *sem, int ms_timeout)
+{
+#if (MSG_OPT_OS == MSG_OPT_OS_LINUX)
+    uint64_t val;
+    int ret = poll(&sem->poll_fd, 1, ms_timeout);
+    if (ret == -1) {
+        perror("poll fail\n");
+        return WAIT_FAIL;
+    } else if (ret == 0) {
+        // printf("poll timeout\n");
+        return WAIT_TIMEOUT;
+    }
+
+    if (sem->poll_fd.revents & POLLIN) {
+        if (read(sem->poll_fd.fd, &val, sizeof(val)) == sizeof(val)) { // 清零
+            // printf("read %ld\n", val);
+            return WAIT_MSG_COME;
+        }
+        else {
+            printf("read error\n");
+        }
+    }
+
+    // 检查错误事件
+    printf("something err happened,revents:%x\n", sem->poll_fd.revents);
+    return WAIT_FAIL;
+#elif (MSG_OPT_OS == MSG_OPT_OS_freeRTOS)
+#elif (MSG_OPT_OS == MSG_OPT_OS_RT_THREAD)
+#elif (MSG_OPT_OS == MSG_OPT_OS_NONE_OR_OSAL)
+#elif (MSG_OPT_OS == MSG_OPT_OS_USER_DEFINED)
+#endif
+}
+
+#endif
diff --git a/mw/has_task_msg_manager/has_task_msg_os_port.h b/mw/has_task_msg_manager/has_task_msg_os_port.h
index e256492..c369495 100644
--- a/mw/has_task_msg_manager/has_task_msg_os_port.h
+++ b/mw/has_task_msg_manager/has_task_msg_os_port.h
@@ -14,8 +14,15 @@
 // #define MSG_OPT_OS MSG_OPT_OS_NONE_OR_OSAL // 裸机或osal
 // #define MSG_OPT_OS MSG_OPT_OS_USER_DEFINED // 自定义
 
-#define MSG_OPT_USE_MUTEX // 支持互斥量
+#define MSG_OPT_MUTEX_SEM // 支持互斥量和信号量
 
+#ifdef MSG_OPT_MUTEX_SEM
+enum MSG_WAIT_RET{
+    WAIT_FAIL = -1, // 等待失败
+    WAIT_TIMEOUT, // 等待超时
+    WAIT_MSG_COME, // 需要处理消息
+};
+#endif
 
 /* ----------------------- for Linux ----------------------- */
 #if (MSG_OPT_OS == MSG_OPT_OS_LINUX)
@@ -24,11 +31,22 @@
 #include <stdlib.h>
 #include <stdio.h>
 
-#ifdef MSG_OPT_USE_MUTEX
+#ifdef MSG_OPT_MUTEX_SEM
+#include <poll.h>
+#include <sys/eventfd.h>
+#include <unistd.h>
 #define msg_mutex_t pthread_mutex_t
 #define msg_mutex_init(m) pthread_mutex_init(m, NULL)
 #define msg_mutex_lock(m) pthread_mutex_lock(m)
 #define msg_mutex_unlock(m) pthread_mutex_unlock(m)
+typedef struct {
+    struct pollfd poll_fd;
+} sync_t;
+#define msg_sem_t sync_t
+
+int msg_sem_init(msg_sem_t *sem);
+int msg_sem_notify(msg_sem_t *sem);
+enum MSG_WAIT_RET msg_sem_wait(msg_sem_t *sem, int ms_timeout);
 #else
 #define msg_mutex_t 
 #define msg_mutex_init(m)
@@ -46,7 +64,7 @@
 #include <stdio.h>
 #include "FreeRTOS.h" 
 #include "semphr.h"
-#ifdef MSG_OPT_USE_MUTEX
+#ifdef MSG_OPT_MUTEX_SEM
 #define msg_mutex_t SemaphoreHandle_t
 static inline void msg_mutex_init(void *mutex) {
 	*mutex = xSemaphoreCreateMutex();
@@ -64,6 +82,13 @@ static inline void msg_mutex_lock(void *mutex) {
 static inline void msg_mutex_unlock(void *mutex) {
     xSemaphoreGive(*mutex);
 }
+
+#define msg_sem_t int
+
+int msg_sem_init(msg_sem_t *sem);
+int msg_sem_notify(msg_sem_t *sem);
+enum MSG_WAIT_RET msg_sem_wait(msg_sem_t *sem, int ms_timeout);
+
 #else
 #define msg_mutex_t 
 #define msg_mutex_init(m)
@@ -80,7 +105,7 @@ static inline void msg_mutex_unlock(void *mutex) {
 #include <stdlib.h>
 #include <stdio.h>
 #include <rtthread.h>
-#ifdef MSG_OPT_USE_MUTEX
+#ifdef MSG_OPT_MUTEX_SEM
 #define msg_mutex_t rt_mutex_t
 static inline void msg_mutex_init(void *mutex) {
 	*mutex = rt_mutex_create("has_msg", RT_IPC_FLAG_FIFO);
@@ -98,6 +123,13 @@ static inline void msg_mutex_lock(void *mutex) {
 static inline void msg_mutex_unlock(void *mutex) {
     rt_mutex_release(*mutex);
 }
+
+#define msg_sem_t int
+
+int msg_sem_init(msg_sem_t *sem);
+int msg_sem_notify(msg_sem_t *sem);
+enum MSG_WAIT_RET msg_sem_wait(msg_sem_t *sem, int ms_timeout);
+
 #else
 #define msg_mutex_t 
 #define msg_mutex_init(m)
@@ -113,7 +145,7 @@ static inline void msg_mutex_unlock(void *mutex) {
 #elif (MSG_OPT_OS == MSG_OPT_OS_NONE_OR_OSAL)
 #include <stdlib.h>
 #include <stdio.h>
-#undef MSG_OPT_USE_MUTEX
+#undef MSG_OPT_MUTEX_SEM
 
 #define msg_mutex_t 
 #define msg_mutex_init(m)
@@ -129,7 +161,7 @@ static inline void msg_mutex_unlock(void *mutex) {
 #include <stdlib.h>
 #include <stdio.h>
 
-#ifdef MSG_OPT_USE_MUTEX
+#ifdef MSG_OPT_MUTEX_SEM
 #define msg_mutex_t int/* to be done */
 static inline void msg_mutex_init(void *mutex) {
 	/* to be done */
@@ -142,6 +174,13 @@ static inline void msg_mutex_lock(void *mutex) {
 static inline void msg_mutex_unlock(void *mutex) {
     /* to be done */
 }
+
+#define msg_sem_t int // to be done
+
+int msg_sem_init(msg_sem_t *sem);
+int msg_sem_notify(msg_sem_t *sem);
+enum MSG_WAIT_RET msg_sem_wait(msg_sem_t *sem, int ms_timeout);
+
 #else
 #define msg_mutex_t 
 #define msg_mutex_init(m)