gecko-dev/gfx/layers/IPDLActor.h
Daniel Holbert 126bd9e1a4 Bug 1412427 part 8: (automated patch) Switch a bunch of C++ files in gfx to use our standard mode lines. r=jrmuizel
This patch was generated automatically by the "modeline.py" script, available
here: https://github.com/amccreight/moz-source-tools/blob/master/modeline.py

For every file that is modified in this patch, the changes are as follows:
 (1) The patch changes the file to use the exact C++ mode lines from the
     Mozilla coding style guide, available here:
https://developer.mozilla.org/en-US/docs/Mozilla/Developer_guide/Coding_Style#Mode_Line

 (2) The patch deletes any blank lines between the mode line & the MPL
     boilerplate comment.

 (3) If the file previously had the mode lines and MPL boilerplate in a
     single contiguous C++ comment, then the patch splits them into
     separate C++ comments, to match the boilerplate in the coding style.

MozReview-Commit-ID: 77D61xpSmIl

--HG--
extra : rebase_source : c6162fa3cf539a07177a19838324bf368faa162b
2017-10-27 16:10:06 -07:00

64 lines
1.5 KiB
C++

/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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/. */
#ifndef MOZILLA_LAYERS_IPDLACTOR_H
#define MOZILLA_LAYERS_IPDLACTOR_H
#include "mozilla/ipc/ProtocolUtils.h"
#include "mozilla/layers/CompositableForwarder.h"
#include "mozilla/Unused.h"
#include "gfxPlatform.h"
namespace mozilla {
namespace layers {
/// A base class to facilitate the deallocation of IPDL actors.
///
/// Implements the parent side of the simple deallocation handshake.
/// Override the Destroy method rather than the ActorDestroy method.
template<typename Protocol>
class ParentActor : public Protocol
{
public:
ParentActor() : mDestroyed(false) {}
~ParentActor() { MOZ_ASSERT(mDestroyed); }
bool CanSend() const { return !mDestroyed; }
// Override this rather than ActorDestroy
virtual void Destroy() {}
virtual mozilla::ipc::IPCResult RecvDestroy() override
{
DestroyIfNeeded();
Unused << Protocol::Send__delete__(this);
return IPC_OK();
}
typedef ipc::IProtocol::ActorDestroyReason Why;
virtual void ActorDestroy(Why) override {
DestroyIfNeeded();
}
protected:
void DestroyIfNeeded() {
if (!mDestroyed) {
Destroy();
mDestroyed = true;
}
}
private:
bool mDestroyed;
};
} // namespace
} // namespace
#endif