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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_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   // Returns the owning handle transferring the ownership.
     30   mojo::ScopedHandle TakeHandle();
     31 
     32  private:
     33   ~MojoHandleAttachment() override;
     34   mojo::ScopedHandle handle_;
     35 
     36   DISALLOW_COPY_AND_ASSIGN(MojoHandleAttachment);
     37 };
     38 
     39 }  // namespace internal
     40 }  // namespace IPC
     41 
     42 #endif  // IPC_IPC_MOJO_HANDLE_ATTACHMENT_H_
     43