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1 // Copyright (c) 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 
5 #ifndef IPC_IPC_MOJO_HANDLE_ATTACHMENT_H_
6 #define IPC_IPC_MOJO_HANDLE_ATTACHMENT_H_
7 
8 #include "base/files/file.h"
9 #include "base/macros.h"
10 #include "build/build_config.h"
11 #include "ipc/ipc_message_attachment.h"
12 #include "ipc/ipc_message_support_export.h"
13 #include "mojo/public/cpp/system/handle.h"
14 
15 namespace IPC {
16 
17 namespace internal {
18 
19 // A MessageAttachment that holds a MojoHandle.
20 // This can hold any type of transferrable Mojo handle (i.e. message pipe, data
21 // pipe, etc), but the receiver is expected to know what type of handle to
22 // expect.
23 class IPC_MESSAGE_SUPPORT_EXPORT MojoHandleAttachment
24     : public MessageAttachment {
25  public:
26   explicit MojoHandleAttachment(mojo::ScopedHandle handle);
27 
28   Type GetType() const override;
29 
30   // Returns the owning handle transferring the ownership.
31   mojo::ScopedHandle TakeHandle();
32 
33  private:
34   ~MojoHandleAttachment() override;
35   mojo::ScopedHandle handle_;
36 
37   DISALLOW_COPY_AND_ASSIGN(MojoHandleAttachment);
38 };
39 
40 }  // namespace internal
41 }  // namespace IPC
42 
43 #endif  // IPC_IPC_MOJO_HANDLE_ATTACHMENT_H_
44