Add FileDescriptor class
A simple class to wrap a file descriptor so it can
be opened on construction and closed on destruction.
Change-Id: I16d481fdc91e99720acd9cabff3a3a4690d8a573
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
diff --git a/filedescriptor.hpp b/filedescriptor.hpp
new file mode 100644
index 0000000..b03d314
--- /dev/null
+++ b/filedescriptor.hpp
@@ -0,0 +1,57 @@
+#pragma once
+
+#include <fcntl.h>
+#include <string>
+
+namespace openpower
+{
+namespace p9_util
+{
+
+/**
+ * Class to wrap a file descriptor.
+ *
+ * Opens the descriptor in the constructor, and
+ * then closes it when destroyed.
+ */
+class FileDescriptor
+{
+ public:
+
+ FileDescriptor() = delete;
+ FileDescriptor(const FileDescriptor&) = delete;
+ FileDescriptor(FileDescriptor&&) = default;
+ FileDescriptor& operator=(const FileDescriptor) = delete;
+ FileDescriptor& operator=(FileDescriptor&&) = default;
+
+ /**
+ * Creates a file descriptor by opening the device
+ * path passed in.
+ *
+ * @param path[in] - the device path that will be open
+ */
+ FileDescriptor(const std::string& path);
+
+ /**
+ * Closes the file.
+ */
+ ~FileDescriptor();
+
+ /**
+ * The method to access the file descriptor value
+ */
+ inline int operator()() const
+ {
+ return fd;
+ }
+
+ private:
+
+ /**
+ * The actual file descriptor
+ */
+ int fd;
+};
+
+}
+}