Mojo: Rename PlatformChannelHandle to PlatformHandle, etc.

mojo/system/scoped_platform_handle.h

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MOJO_SYSTEM_SCOPED_PLATFORM_HANDLE_H_
+#define MOJO_SYSTEM_SCOPED_PLATFORM_HANDLE_H_
+
+#include "base/compiler_specific.h"
+#include "base/move.h"
+#include "mojo/system/platform_handle.h"
+#include "mojo/system/system_impl_export.h"
+
+namespace mojo {
+namespace system {
+
+class MOJO_SYSTEM_IMPL_EXPORT ScopedPlatformHandle {
+  MOVE_ONLY_TYPE_FOR_CPP_03(ScopedPlatformHandle, RValue);
+
+ public:
+  ScopedPlatformHandle() {}
+  explicit ScopedPlatformHandle(PlatformHandle handle) : handle_(handle) {}
+  ~ScopedPlatformHandle() { handle_.CloseIfNecessary(); }
+
+  // Move-only constructor and operator=.
+  ScopedPlatformHandle(RValue other) : handle_(other.object->release()) {}
+  ScopedPlatformHandle& operator=(RValue other) {
+    handle_ = other.object->release();
+    return *this;
+  }
+
+  const PlatformHandle& get() const { return handle_; }
+
+  void swap(ScopedPlatformHandle& other) {
+    PlatformHandle temp = handle_;
+    handle_ = other.handle_;
+    other.handle_ = temp;
+  }
+
+  PlatformHandle release() WARN_UNUSED_RESULT {
+    PlatformHandle rv = handle_;
+    handle_ = PlatformHandle();
+    return rv;
+  }
+
+  void reset(PlatformHandle handle = PlatformHandle()) {
+    handle_.CloseIfNecessary();
+    handle_ = handle;
+  }
+
+  bool is_valid() const {
+    return handle_.is_valid();
+  }
+
+ private:
+  PlatformHandle handle_;
+};
+
+}  // namespace system
+}  // namespace mojo
+
+#endif  // MOJO_SYSTEM_SCOPED_PLATFORM_HANDLE_H_