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_export.h"
12 #include "ipc/ipc_message_attachment.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_EXPORT MojoHandleAttachment : public MessageAttachment {
24  public:
25   explicit MojoHandleAttachment(mojo::ScopedHandle handle);
26 
27   Type GetType() const override;
28 
29 #if defined(OS_POSIX)
30   // Should not be called.
31   base::PlatformFile TakePlatformFile() override;
32 #endif  // OS_POSIX
33 
34   // Returns the owning handle transferring the ownership.
35   mojo::ScopedHandle TakeHandle();
36 
37  private:
38   ~MojoHandleAttachment() override;
39   mojo::ScopedHandle handle_;
40 
41   DISALLOW_COPY_AND_ASSIGN(MojoHandleAttachment);
42 };
43 
44 }  // namespace internal
45 }  // namespace IPC
46 
47 #endif  // IPC_IPC_MOJO_HANDLE_ATTACHMENT_H_
48