diff --git a/docs/about-conditional.md b/docs/about-conditional.md
index 8433c675..ade00d2c 100644
--- a/docs/about-conditional.md
+++ b/docs/about-conditional.md
@@ -58,11 +58,13 @@ public:
     static WFConditional *create_conditional(const std::string& cond_name, SubTask *task, void **msgbuf);
     static int signal_by_name(const std::string& cond_name, void *msg);
     static int signal_by_name(const std::string& cond_name, void *msg, size_t max);
+    static int signal_by_name(const std::string& cond_name, void *const msg[], size_t max);
 };
 ~~~
 我们看到，与普通条件任务唯一区别是，命名条件任务创建时，需要传入一个cond_name。  
 而signal_by_name()接口，默认将msg发送到所有在这个名称上等待的条件任务，将它们全部唤醒。  
-也可以通过max参数指定唤醒的最大任务数。函数的返回值表示实际唤醒的个数。  
+也可以通过max参数指定唤醒的最大任务数。此时，msg还可以是一个数组，可给不同的条件任务发送不同的消息。  
+任何一个signal_by_name的重载函数，其返回值都是表示实际唤醒的条件任务个数。  
 这就相当于实现了观察者模式。  
 
 # 示例
diff --git a/docs/en/tutorial-09-http_file_server.md b/docs/en/tutorial-09-http_file_server.md
index 02e3fa3a..f966d405 100644
--- a/docs/en/tutorial-09-http_file_server.md
+++ b/docs/en/tutorial-09-http_file_server.md
@@ -107,10 +107,10 @@ public:
                                             fio_callback_t callback);
 
     /* Interface with file path name */
-	static WFFileIOTask *create_pread_task(const std::string& pathname, void *buf, size_t count, off_t offset,
+	static WFFileIOTask *create_pread_task(const std::string& path, void *buf, size_t count, off_t offset,
                                            fio_callback_t callback);
 
-    static WFFileIOTask *create_pwrite_task(const std::string& pathname, void *buf, size_t count, off_t offset,
+    static WFFileIOTask *create_pwrite_task(const std::string& path, void *buf, size_t count, off_t offset,
                                             fio_callback_t callback);  
 };
 ~~~
diff --git a/docs/tutorial-09-http_file_server.md b/docs/tutorial-09-http_file_server.md
index 1fc9edd0..e0913b5a 100644
--- a/docs/tutorial-09-http_file_server.md
+++ b/docs/tutorial-09-http_file_server.md
@@ -102,10 +102,10 @@ public:
     ...
 
     /* Interface with file path name */
-	static WFFileIOTask *create_pread_task(const std::string& pathname, void *buf, size_t count, off_t offset,
+	static WFFileIOTask *create_pread_task(const std::string& path, void *buf, size_t count, off_t offset,
                                            fio_callback_t callback);
 
-    static WFFileIOTask *create_pwrite_task(const std::string& pathname, void *buf, size_t count, off_t offset,
+    static WFFileIOTask *create_pwrite_task(const std::string& path, void *buf, size_t count, off_t offset,
                                             fio_callback_t callback);  
 };
 ~~~
diff --git a/src/factory/FileTaskImpl.cc b/src/factory/FileTaskImpl.cc
index c7c82071..5d9de0a3 100644
--- a/src/factory/FileTaskImpl.cc
+++ b/src/factory/FileTaskImpl.cc
@@ -354,46 +354,46 @@ WFFileSyncTask *WFTaskFactory::create_fdsync_task(int fd,
 
 /* Factory functions with path name. */
 
-WFFileIOTask *WFTaskFactory::create_pread_task(const std::string& pathname,
+WFFileIOTask *WFTaskFactory::create_pread_task(const std::string& path,
 											   void *buf,
 											   size_t count,
 											   off_t offset,
 											   fio_callback_t callback)
 {
-	return new __WFFilepreadTask(pathname, buf, count, offset,
+	return new __WFFilepreadTask(path, buf, count, offset,
 								 WFGlobal::get_io_service(),
 								 std::move(callback));
 }
 
-WFFileIOTask *WFTaskFactory::create_pwrite_task(const std::string& pathname,
+WFFileIOTask *WFTaskFactory::create_pwrite_task(const std::string& path,
 												const void *buf,
 												size_t count,
 												off_t offset,
 												fio_callback_t callback)
 {
-	return new __WFFilepwriteTask(pathname, buf, count, offset,
+	return new __WFFilepwriteTask(path, buf, count, offset,
 								  WFGlobal::get_io_service(),
 								  std::move(callback));
 }
 
-WFFileVIOTask *WFTaskFactory::create_preadv_task(const std::string& pathname,
+WFFileVIOTask *WFTaskFactory::create_preadv_task(const std::string& path,
 												 const struct iovec *iovec,
 												 int iovcnt,
 												 off_t offset,
 												 fvio_callback_t callback)
 {
-	return new __WFFilepreadvTask(pathname, iovec, iovcnt, offset,
+	return new __WFFilepreadvTask(path, iovec, iovcnt, offset,
 								  WFGlobal::get_io_service(),
 								  std::move(callback));
 }
 
-WFFileVIOTask *WFTaskFactory::create_pwritev_task(const std::string& pathname,
+WFFileVIOTask *WFTaskFactory::create_pwritev_task(const std::string& path,
 												  const struct iovec *iovec,
 												  int iovcnt,
 												  off_t offset,
 												  fvio_callback_t callback)
 {
-	return new __WFFilepwritevTask(pathname, iovec, iovcnt, offset,
+	return new __WFFilepwritevTask(path, iovec, iovcnt, offset,
 								   WFGlobal::get_io_service(),
 								   std::move(callback));
 }
diff --git a/src/factory/WFTaskFactory.h b/src/factory/WFTaskFactory.h
index e45d3bff..b985cc9d 100644
--- a/src/factory/WFTaskFactory.h
+++ b/src/factory/WFTaskFactory.h
@@ -193,25 +193,25 @@ public:
 
 	/* File tasks with path name. */
 public:
-	static WFFileIOTask *create_pread_task(const std::string& pathname,
+	static WFFileIOTask *create_pread_task(const std::string& path,
 										   void *buf,
 										   size_t count,
 										   off_t offset,
 										   fio_callback_t callback);
 
-	static WFFileIOTask *create_pwrite_task(const std::string& pathname,
+	static WFFileIOTask *create_pwrite_task(const std::string& path,
 											const void *buf,
 											size_t count,
 											off_t offset,
 											fio_callback_t callback);
 
-	static WFFileVIOTask *create_preadv_task(const std::string& pathname,
+	static WFFileVIOTask *create_preadv_task(const std::string& path,
 											 const struct iovec *iov,
 											 int iovcnt,
 											 off_t offset,
 											 fvio_callback_t callback);
 
-	static WFFileVIOTask *create_pwritev_task(const std::string& pathname,
+	static WFFileVIOTask *create_pwritev_task(const std::string& path,
 											  const struct iovec *iov,
 											  int iovcnt,
 											  off_t offset,