ipc/brokerable_attachment.h

   1 // Copyright 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_BROKERABLE_ATTACHMENT_H_
   6 #define IPC_BROKERABLE_ATTACHMENT_H_
   7
   8 #include <stdint.h>
   9
  10 #include "base/macros.h"
  11 #include "ipc/ipc_export.h"
  12 #include "ipc/ipc_message_attachment.h"
  13
  14 namespace IPC {
  15
  16 // This subclass of MessageAttachment requires an AttachmentBroker to be
  17 // attached to a Chrome IPC message.
  18 class IPC_EXPORT BrokerableAttachment : public MessageAttachment {
  19  public:
  20   // An id uniquely identifies an attachment sent via a broker.
  21   struct IPC_EXPORT AttachmentId {
  22     uint32_t nonce[4];
  23   };
  24
  25   // The identifier is unique across all Chrome processes.
  26   AttachmentId GetIdentifier() const;
  27
  28  protected:
  29   BrokerableAttachment();
  30   ~BrokerableAttachment() override;
  31
  32  private:
  33   // This member uniquely identifies a BrokerableAttachment across all Chrome
  34   // processes.
  35   AttachmentId id_;
  36   DISALLOW_COPY_AND_ASSIGN(BrokerableAttachment);
  37 };
  38
  39 }  // namespace IPC
  40
  41 #endif  // IPC_BROKERABLE_ATTACHMENT_H_