Moving mmap to poly, cleaning up devices.

src/poly/mapped_memory.h

@@ -0,0 +1,46 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2014 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef POLY_MAPPED_MEMORY_H_
+#define POLY_MAPPED_MEMORY_H_
+
+#include <memory>
+#include <string>
+
+namespace poly {
+
+class MappedMemory {
+ public:
+  enum class Mode {
+    READ,
+    READ_WRITE,
+  };
+
+  virtual ~MappedMemory() = default;
+
+  static std::unique_ptr<MappedMemory> Open(const std::wstring& path, Mode mode,
+                                            size_t offset = 0,
+                                            size_t length = 0);
+
+  uint8_t* data() const { return reinterpret_cast<uint8_t*>(data_); }
+  size_t size() const { return size_; }
+
+ protected:
+  MappedMemory(const std::wstring& path, Mode mode)
+      : path_(path), mode_(mode), data_(nullptr), size_(0) {}
+
+  std::wstring path_;
+  Mode mode_;
+  void* data_;
+  size_t size_;
+};
+
+}  // namespace poly
+
+#endif  // POLY_MAPPED_MEMORY_H_