X-Git-Url: https://git.saurik.com/apple/system_cmds.git/blobdiff_plain/1a7e3f61d38d679bba59130891c2031b5a0092b6..bd6521f0fc816ab056bc71376f9706a69b3b52c1:/CPPUtil/UtilFileDescriptor.hpp?ds=inline

diff --git a/CPPUtil/UtilFileDescriptor.hpp b/CPPUtil/UtilFileDescriptor.hpp
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+//
+//  UtilFileDescriptor.hpp
+//  CPPUtil
+//
+//  Created by James McIlree on 4/16/13.
+//  Copyright (c) 2013 Apple. All rights reserved.
+//
+
+#ifndef CPPUtil_UtilFileDescriptor_hpp
+#define CPPUtil_UtilFileDescriptor_hpp
+
+class FileDescriptor {
+    protected:
+	int _fd;
+
+	// FD's aren't reference counted, we allow move semantics but
+	// not copy semantics. Disable the copy constructor and copy
+	// assignment.
+	FileDescriptor(const FileDescriptor& that) = delete;
+	FileDescriptor& operator=(const FileDescriptor& other) = delete;
+
+    public:
+
+	FileDescriptor() : _fd(-1)				{}
+	FileDescriptor(int fd) : _fd(fd)			{}
+
+	template <typename... Args>
+	FileDescriptor(Args&& ... args) :
+		_fd(open(static_cast<Args &&>(args)...))
+	{
+	}
+
+	FileDescriptor (FileDescriptor&& rhs) noexcept :
+		_fd(rhs._fd)
+	{
+		rhs._fd = -1;
+	}
+
+	~FileDescriptor()					{ close(); }
+
+	FileDescriptor& operator=(int fd)			{ close(); _fd = fd; return *this; }
+	FileDescriptor& operator=(FileDescriptor&& rhs)		{ std::swap(_fd, rhs._fd); return *this; }
+
+	bool is_open() const					{ return _fd > -1 ? true : false; }
+	void close()						{ if (is_open()) { ::close(_fd); _fd = -1; } }
+
+	explicit operator bool() const				{ return is_open(); }
+	operator int() const					{ return _fd; }
+};
+
+
+#endif