From 0ebf5bdf043a27fd3dfb7f92e0cb63d88954c44d Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 03:47:29 +0200 Subject: Adding upstream version 115.8.0esr. Signed-off-by: Daniel Baumann --- gfx/layers/IPDLActor.h | 59 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 gfx/layers/IPDLActor.h (limited to 'gfx/layers/IPDLActor.h') diff --git a/gfx/layers/IPDLActor.h b/gfx/layers/IPDLActor.h new file mode 100644 index 0000000000..b5eb04d0dc --- /dev/null +++ b/gfx/layers/IPDLActor.h @@ -0,0 +1,59 @@ +/* -*- 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 +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() {} + + mozilla::ipc::IPCResult RecvDestroy() final { + DestroyIfNeeded(); + Unused << Protocol::Send__delete__(this); + return IPC_OK(); + } + + typedef ipc::IProtocol::ActorDestroyReason Why; + + void ActorDestroy(Why) override { DestroyIfNeeded(); } + + protected: + void DestroyIfNeeded() { + if (!mDestroyed) { + Destroy(); + mDestroyed = true; + } + } + + private: + bool mDestroyed; +}; + +} // namespace layers +} // namespace mozilla + +#endif -- cgit v1.2.3