From 5a4ef7d94d5424de8b5389f69548cfc9462c1c69 Mon Sep 17 00:00:00 2001
From: wangyu- <wangyucn@gmail.com>
Date: Mon, 25 Sep 2017 10:39:05 -0500
Subject: [PATCH] just commit

---
 fd_manager.cpp | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++
 fd_manager.h   | 33 +++++++++++++++++++++++++++
 2 files changed, 95 insertions(+)
 create mode 100644 fd_manager.cpp
 create mode 100644 fd_manager.h

diff --git a/fd_manager.cpp b/fd_manager.cpp
new file mode 100644
index 0000000..e1a8d6d
--- /dev/null
+++ b/fd_manager.cpp
@@ -0,0 +1,62 @@
+/*
+ * fd_manager.cpp
+ *
+ *  Created on: Sep 25, 2017
+ *      Author: root
+ */
+
+
+#include "fd_manager.h"
+int fd_manager_t::fd_exist(int fd)
+{
+	return fd_to_fd64_mp.find(fd)!=fd_to_fd64_mp.end();
+}
+int fd_manager_t::fd64_exist(fd64_t fd64)
+{
+	return fd64_to_fd_mp.find(fd64)!=fd64_to_fd_mp.end();
+}
+fd64_t fd_manager_t::fd_to_fd64(int fd)
+{
+	assert(fd_exist(fd));
+	return fd_to_fd64_mp[fd];
+}
+int fd_manager_t::fd64_to_fd(fd64_t fd64)
+{
+	assert(fd64_exist(fd64));
+	return fd64_to_fd_mp[fd64];
+}
+void fd_manager_t::remove_fd(int fd)
+{
+	assert(fd_exist(fd));
+	fd64_t fd64=fd_to_fd64_mp[fd];
+	fd_to_fd64_mp.erase(fd);
+	fd64_to_fd_mp.erase(fd64);
+	//return 0;
+}
+void fd_manager_t::remove_fd64(fd64_t fd64)
+{
+	assert(fd64_exist(fd64));
+	int fd=fd64_to_fd_mp[fd64];
+	fd64_to_fd_mp.erase(fd64);
+	fd_to_fd64_mp.erase(fd);
+	//return 0;
+}
+void fd_manager_t::reserve()
+{
+	fd_to_fd64_mp.reserve(100007);
+	fd64_to_fd_mp.reserve(100007);
+	//return 0;
+}
+u64_t fd_manager_t::insert_fd(int fd)
+{
+	assert(!fd_exist(fd));
+	fd64_t fd64=counter++;
+	fd_to_fd64_mp[fd]=fd64;
+	fd64_to_fd_mp[fd64]=fd;
+	return fd64;
+}
+fd_manager_t::fd_manager_t()
+{
+	counter=u32_t(-1);
+	counter+=2;
+}
diff --git a/fd_manager.h b/fd_manager.h
new file mode 100644
index 0000000..4ad55da
--- /dev/null
+++ b/fd_manager.h
@@ -0,0 +1,33 @@
+/*
+ * fd_manager.h
+ *
+ *  Created on: Sep 25, 2017
+ *      Author: root
+ */
+
+#ifndef FD_MANAGER_H_
+#define FD_MANAGER_H_
+
+#include "common.h"
+
+typedef u64_t fd64_t;
+
+struct fd_manager_t   //conver fd to a uniq 64bit number,avoid fd value conflict caused by close and re-create
+//not used currently
+{
+	u64_t counter;
+	unordered_map<int,u64_t> fd_to_fd64_mp;
+	unordered_map<u64_t,int> fd64_to_fd_mp;
+	int fd_exist(int fd);
+	int fd64_exist(fd64_t fd64);
+	fd64_t fd_to_fd64(int fd);
+	int fd64_to_fd(fd64_t);
+	void remove_fd(int fd);
+	void remove_fd64(fd64_t fd64);
+	void reserve();
+	u64_t insert_fd(int fd);
+	fd_manager_t();
+};
+
+extern fd_manager_t fd_manager;
+#endif /* FD_MANAGER_H_ */