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author | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
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committer | Matt A. Tobin <mattatobin@localhost.localdomain> | 2018-02-02 04:16:08 -0500 |
commit | 5f8de423f190bbb79a62f804151bc24824fa32d8 (patch) | |
tree | 10027f336435511475e392454359edea8e25895d /gfx/layers/ipc/ImageContainerChild.h | |
parent | 49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff) | |
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Add m-esr52 at 52.6.0
Diffstat (limited to 'gfx/layers/ipc/ImageContainerChild.h')
-rw-r--r-- | gfx/layers/ipc/ImageContainerChild.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/gfx/layers/ipc/ImageContainerChild.h b/gfx/layers/ipc/ImageContainerChild.h new file mode 100644 index 000000000..839540411 --- /dev/null +++ b/gfx/layers/ipc/ImageContainerChild.h @@ -0,0 +1,61 @@ +/* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * 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_gfx_layers_ImageContainerChild_h +#define mozilla_gfx_layers_ImageContainerChild_h + +#include "mozilla/Mutex.h" +#include "mozilla/layers/PImageContainerChild.h" + +namespace mozilla { +namespace layers { + +class ImageContainer; +class ImageCompositeNotification; + +/** + * The child side of PImageContainer. It's best to avoid ImageContainer filling + * this role since IPDL objects should be associated with a single thread and + * ImageContainer definitely isn't. This object belongs to (and is always + * destroyed on) the ImageBridge thread, except when we need to destroy it + * during shutdown. + * An ImageContainer owns one of these; we have a weak reference to our + * ImageContainer. + */ +class ImageContainerChild final : public PImageContainerChild +{ +public: + explicit ImageContainerChild(ImageContainer* aImageContainer); + + NS_INLINE_DECL_THREADSAFE_REFCOUNTING(ImageContainerChild) + + void RegisterWithIPDL(); + void UnregisterFromIPDL(); + void SendAsyncDelete(); + + void NotifyComposite(const ImageCompositeNotification& aNotification); + void ForgetImageContainer(); + +private: + ~ImageContainerChild() + {} + +private: + Mutex mLock; + ImageContainer* mImageContainer; + + // If mIPCOpen is false, it means the IPDL code tried to deallocate the actor + // before the ImageContainer released it. When this happens we don't actually + // delete the actor right away because the ImageContainer has a reference to + // it. In this case the actor will be deleted when the ImageContainer lets go + // of it. + // mIPCOpen must not be accessed off the ImageBridgeChild thread. + bool mIPCOpen; +}; + +} // namespace layers +} // namespace mozilla + +#endif // mozilla_gfx_layers_ImageContainerChild_h |