ipc/ipc_platform_file_attachment_posix.h

   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_PLATFORM_FILE_ATTACHMENT_H_
   6 #define IPC_IPC_PLATFORM_FILE_ATTACHMENT_H_
   7
   8 #include "ipc/ipc_export.h"
   9 #include "ipc/ipc_message_attachment.h"
  10
  11 namespace IPC {
  12 namespace internal {
  13
  14 // A platform file that is sent over |Channel| as a part of |Message|.
  15 // PlatformFileAttachment optionally owns the file and |owning_| is set in that
  16 // case. Also, |file_| is not cleared even after the ownership is taken.
  17 // Some old clients require this strange behavior.
  18 class IPC_EXPORT PlatformFileAttachment : public MessageAttachment {
  19  public:
  20   // Non-owning constructor
  21   explicit PlatformFileAttachment(base::PlatformFile file);
  22   // Owning constructor
  23   explicit PlatformFileAttachment(base::ScopedFD file);
  24
  25   Type GetType() const override;
  26   base::PlatformFile TakePlatformFile() override;
  27
  28   base::PlatformFile file() const { return file_; }
  29   bool Owns() const { return owning_.is_valid(); }
  30
  31  private:
  32   ~PlatformFileAttachment() override;
  33
  34   base::PlatformFile file_;
  35   base::ScopedFD owning_;
  36 };
  37
  38 base::PlatformFile GetPlatformFile(scoped_refptr<MessageAttachment> attachment);
  39
  40 }  // namespace internal
  41 }  // namespace IPC
  42
  43 #endif  // IPC_IPC_PLATFORM_FILE_ATTACHMENT_H_