gfx/layers/ipc/CompositorChild.h@97036ab72558 (annotated)
gfx/layers/ipc/CompositorChild.h
Tue, 06 Jan 2015 21:39:09 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Tue, 06 Jan 2015 21:39:09 +0100
- branch
- TOR_BUG_9701
- changeset 8
- 97036ab72558
- permissions
- -rw-r--r--
Conditionally force memory storage according to privacy.thirdparty.isolate;
This solves Tor bug #9701, complying with disk avoidance documented in
https://www.torproject.org/projects/torbrowser/design/#disk-avoidance.
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| michael@0 | 2 | /* vim: set sw=2 ts=8 et tw=80 : */ |
| michael@0 | 3 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 4 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 5 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 6 | |
| michael@0 | 7 | #ifndef mozilla_layers_CompositorChild_h |
| michael@0 | 8 | #define mozilla_layers_CompositorChild_h |
| michael@0 | 9 | |
| michael@0 | 10 | #include "base/basictypes.h" // for DISALLOW_EVIL_CONSTRUCTORS |
| michael@0 | 11 | #include "mozilla/Assertions.h" // for MOZ_ASSERT_HELPER2 |
| michael@0 | 12 | #include "mozilla/Attributes.h" // for MOZ_OVERRIDE |
| michael@0 | 13 | #include "mozilla/ipc/ProtocolUtils.h" |
| michael@0 | 14 | #include "mozilla/layers/PCompositorChild.h" |
| michael@0 | 15 | #include "nsAutoPtr.h" // for nsRefPtr |
| michael@0 | 16 | #include "nsClassHashtable.h" // for nsClassHashtable |
| michael@0 | 17 | #include "nsCOMPtr.h" // for nsCOMPtr |
| michael@0 | 18 | #include "nsHashKeys.h" // for nsUint64HashKey |
| michael@0 | 19 | #include "nsISupportsImpl.h" // for NS_INLINE_DECL_REFCOUNTING |
| michael@0 | 20 | |
| michael@0 | 21 | class nsIObserver; |
| michael@0 | 22 | |
| michael@0 | 23 | namespace mozilla { |
| michael@0 | 24 | namespace layers { |
| michael@0 | 25 | |
| michael@0 | 26 | class ClientLayerManager; |
| michael@0 | 27 | class CompositorParent; |
| michael@0 | 28 | class FrameMetrics; |
| michael@0 | 29 | |
| michael@0 | 30 | class CompositorChild MOZ_FINAL : public PCompositorChild |
| michael@0 | 31 | { |
| michael@0 | 32 | NS_INLINE_DECL_REFCOUNTING(CompositorChild) |
| michael@0 | 33 | public: |
| michael@0 | 34 | CompositorChild(ClientLayerManager *aLayerManager); |
| michael@0 | 35 | |
| michael@0 | 36 | void Destroy(); |
| michael@0 | 37 | |
| michael@0 | 38 | /** |
| michael@0 | 39 | * Lookup the FrameMetrics shared by the compositor process with the |
| michael@0 | 40 | * associated FrameMetrics::ViewID. The returned FrameMetrics is used |
| michael@0 | 41 | * in progressive paint calculations. |
| michael@0 | 42 | */ |
| michael@0 | 43 | bool LookupCompositorFrameMetrics(const FrameMetrics::ViewID aId, FrameMetrics&); |
| michael@0 | 44 | |
| michael@0 | 45 | /** |
| michael@0 | 46 | * We're asked to create a new Compositor in response to an Opens() |
| michael@0 | 47 | * or Bridge() request from our parent process. The Transport is to |
| michael@0 | 48 | * the compositor's context. |
| michael@0 | 49 | */ |
| michael@0 | 50 | static PCompositorChild* |
| michael@0 | 51 | Create(Transport* aTransport, ProcessId aOtherProcess); |
| michael@0 | 52 | |
| michael@0 | 53 | static CompositorChild* Get(); |
| michael@0 | 54 | |
| michael@0 | 55 | static bool ChildProcessHasCompositor() { return sCompositor != nullptr; } |
| michael@0 | 56 | |
| michael@0 | 57 | virtual bool RecvInvalidateAll() MOZ_OVERRIDE; |
| michael@0 | 58 | |
| michael@0 | 59 | virtual bool RecvDidComposite(const uint64_t& aId) MOZ_OVERRIDE; |
| michael@0 | 60 | |
| michael@0 | 61 | private: |
| michael@0 | 62 | // Private destructor, to discourage deletion outside of Release(): |
| michael@0 | 63 | virtual ~CompositorChild(); |
| michael@0 | 64 | |
| michael@0 | 65 | virtual PLayerTransactionChild* |
| michael@0 | 66 | AllocPLayerTransactionChild(const nsTArray<LayersBackend>& aBackendHints, |
| michael@0 | 67 | const uint64_t& aId, |
| michael@0 | 68 | TextureFactoryIdentifier* aTextureFactoryIdentifier, |
| michael@0 | 69 | bool* aSuccess) MOZ_OVERRIDE; |
| michael@0 | 70 | |
| michael@0 | 71 | virtual bool DeallocPLayerTransactionChild(PLayerTransactionChild *aChild) MOZ_OVERRIDE; |
| michael@0 | 72 | |
| michael@0 | 73 | virtual void ActorDestroy(ActorDestroyReason aWhy) MOZ_OVERRIDE; |
| michael@0 | 74 | |
| michael@0 | 75 | virtual bool RecvSharedCompositorFrameMetrics(const mozilla::ipc::SharedMemoryBasic::Handle& metrics, |
| michael@0 | 76 | const CrossProcessMutexHandle& handle, |
| michael@0 | 77 | const uint32_t& aAPZCId) MOZ_OVERRIDE; |
| michael@0 | 78 | |
| michael@0 | 79 | virtual bool RecvReleaseSharedCompositorFrameMetrics(const ViewID& aId, |
| michael@0 | 80 | const uint32_t& aAPZCId) MOZ_OVERRIDE; |
| michael@0 | 81 | |
| michael@0 | 82 | // Class used to store the shared FrameMetrics, mutex, and APZCId in a hash table |
| michael@0 | 83 | class SharedFrameMetricsData { |
| michael@0 | 84 | public: |
| michael@0 | 85 | SharedFrameMetricsData( |
| michael@0 | 86 | const mozilla::ipc::SharedMemoryBasic::Handle& metrics, |
| michael@0 | 87 | const CrossProcessMutexHandle& handle, |
| michael@0 | 88 | const uint32_t& aAPZCId); |
| michael@0 | 89 | |
| michael@0 | 90 | ~SharedFrameMetricsData(); |
| michael@0 | 91 | |
| michael@0 | 92 | void CopyFrameMetrics(FrameMetrics* aFrame); |
| michael@0 | 93 | FrameMetrics::ViewID GetViewID(); |
| michael@0 | 94 | uint32_t GetAPZCId(); |
| michael@0 | 95 | |
| michael@0 | 96 | private: |
| michael@0 | 97 | // Pointer to the class that allows access to the shared memory that contains |
| michael@0 | 98 | // the shared FrameMetrics |
| michael@0 | 99 | mozilla::ipc::SharedMemoryBasic* mBuffer; |
| michael@0 | 100 | CrossProcessMutex* mMutex; |
| michael@0 | 101 | // Unique ID of the APZC that is sharing the FrameMetrics |
| michael@0 | 102 | uint32_t mAPZCId; |
| michael@0 | 103 | }; |
| michael@0 | 104 | |
| michael@0 | 105 | nsRefPtr<ClientLayerManager> mLayerManager; |
| michael@0 | 106 | |
| michael@0 | 107 | // The ViewID of the FrameMetrics is used as the key for this hash table. |
| michael@0 | 108 | // While this should be safe to use since the ViewID is unique |
| michael@0 | 109 | nsClassHashtable<nsUint64HashKey, SharedFrameMetricsData> mFrameMetricsTable; |
| michael@0 | 110 | |
| michael@0 | 111 | // When we're in a child process, this is the process-global |
| michael@0 | 112 | // compositor that we use to forward transactions directly to the |
| michael@0 | 113 | // compositor context in another process. |
| michael@0 | 114 | static CompositorChild* sCompositor; |
| michael@0 | 115 | |
| michael@0 | 116 | DISALLOW_EVIL_CONSTRUCTORS(CompositorChild); |
| michael@0 | 117 | }; |
| michael@0 | 118 | |
| michael@0 | 119 | } // layers |
| michael@0 | 120 | } // mozilla |
| michael@0 | 121 | |
| michael@0 | 122 | #endif // mozilla_layers_CompositorChild_h |
