gecko-dev/ipc/glue/PChildToParentStream.ipdl

/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
 * You can obtain one at http://mozilla.org/MPL/2.0/. */

include protocol PBackground;
include protocol PContent;
include protocol PContentBridge;

namespace mozilla {
namespace ipc {

// This is protocol is the opposite of PParentToChildStream. Please keep these
// protocols in sync.
protocol PChildToParentStream
{
  manager PBackground or PContent or PContentBridge;

parent:
  async Buffer(nsCString aBuffer);
  async Close(nsresult aRv);

child:
  // The parent side has hit an error condition and has requested the child
  // actor issue a Close() message.  The close must be initiated by the child
  // to avoid racing with an in-flight Buffer() message.
  async RequestClose(nsresult aRv);

  // Stream is always destroyed from the parent side.  This occurs if the
  // parent encounters an error while writing to its pipe or if the child
  // signals the stream should close by SendClose().
  async __delete__();
};

} // namespace ipc
} // namespace mozilla