| // Copyright (c) 2015 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 IPC_MOJO_IPC_MOJO_HANDLE_ATTACHMENT_H_ |
| #define IPC_MOJO_IPC_MOJO_HANDLE_ATTACHMENT_H_ |
| |
| #include "base/files/file.h" |
| #include "ipc/ipc_export.h" |
| #include "ipc/ipc_message_attachment.h" |
| #include "mojo/public/cpp/system/handle.h" |
| |
| namespace IPC { |
| |
| namespace internal { |
| |
| // A MessageAttachment that holds a MojoHandle. |
| // * On the sending side, every Mojo handle is a MessagePipe. This is because |
| // any platform files are wrapped by PlatformFileAttachment. |
| // * On the receiving side, the handle can be either MessagePipe or wrapped |
| // platform file: All files, not only MessagePipes are wrapped as a |
| // MojoHandle. The message deserializer should know which type of the object |
| // the handle wraps. |
| class IPC_MOJO_EXPORT MojoHandleAttachment : public MessageAttachment { |
| public: |
| explicit MojoHandleAttachment(mojo::ScopedHandle handle); |
| |
| Type GetType() const override; |
| |
| #if defined(OS_POSIX) |
| // Returns wrapped file if it wraps a file, or |
| // an invalid fd otherwise. The ownership of handle |
| // is passed to the caller. |
| base::PlatformFile TakePlatformFile() override; |
| #endif // OS_POSIX |
| |
| // Returns the owning handle transferring the ownership. |
| mojo::ScopedHandle TakeHandle(); |
| |
| private: |
| ~MojoHandleAttachment() override; |
| mojo::ScopedHandle handle_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MojoHandleAttachment); |
| }; |
| |
| } // namespace internal |
| } // namespace IPC |
| |
| #endif // IPC_MOJO_IPC_MOJO_HANDLE_ATTACHMENT_H_ |