| // Copyright 2019 The Dawn Authors |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| #ifndef INCLUDE_DAWN_WIRE_WIRESERVER_H_ |
| #define INCLUDE_DAWN_WIRE_WIRESERVER_H_ |
| |
| #include <memory> |
| |
| #include "dawn/wire/Wire.h" |
| |
| struct DawnProcTable; |
| |
| namespace dawn::wire { |
| |
| namespace server { |
| class Server; |
| class MemoryTransferService; |
| } // namespace server |
| |
| struct DAWN_WIRE_EXPORT WireServerDescriptor { |
| const DawnProcTable* procs; |
| CommandSerializer* serializer; |
| server::MemoryTransferService* memoryTransferService = nullptr; |
| }; |
| |
| class DAWN_WIRE_EXPORT WireServer : public CommandHandler { |
| public: |
| explicit WireServer(const WireServerDescriptor& descriptor); |
| ~WireServer() override; |
| |
| const volatile char* HandleCommands(const volatile char* commands, size_t size) override; |
| |
| bool InjectTexture(WGPUTexture texture, |
| uint32_t id, |
| uint32_t generation, |
| uint32_t deviceId, |
| uint32_t deviceGeneration); |
| bool InjectSwapChain(WGPUSwapChain swapchain, |
| uint32_t id, |
| uint32_t generation, |
| uint32_t deviceId, |
| uint32_t deviceGeneration); |
| |
| bool InjectDevice(WGPUDevice device, uint32_t id, uint32_t generation); |
| |
| bool InjectInstance(WGPUInstance instance, uint32_t id, uint32_t generation); |
| |
| // Look up a device by (id, generation) pair. Returns nullptr if the generation |
| // has expired or the id is not found. |
| // The Wire does not have destroy hooks to allow an embedder to observe when an object |
| // has been destroyed, but in Chrome, we need to know the list of live devices so we |
| // can call device.Tick() on all of them periodically to ensure progress on asynchronous |
| // work is made. Getting this list can be done by tracking the (id, generation) of |
| // previously injected devices, and observing if GetDevice(id, generation) returns non-null. |
| WGPUDevice GetDevice(uint32_t id, uint32_t generation); |
| |
| // Check if a device handle is known by the wire. |
| // In Chrome, we need to know the list of live devices so we can call device.Tick() on all of |
| // them periodically to ensure progress on asynchronous work is made. |
| bool IsDeviceKnown(WGPUDevice device) const; |
| |
| private: |
| std::unique_ptr<server::Server> mImpl; |
| }; |
| |
| namespace server { |
| class DAWN_WIRE_EXPORT MemoryTransferService { |
| public: |
| MemoryTransferService(); |
| virtual ~MemoryTransferService(); |
| |
| class ReadHandle; |
| class WriteHandle; |
| |
| // Deserialize data to create Read/Write handles. These handles are for the client |
| // to Read/Write data. |
| virtual bool DeserializeReadHandle(const void* deserializePointer, |
| size_t deserializeSize, |
| ReadHandle** readHandle) = 0; |
| virtual bool DeserializeWriteHandle(const void* deserializePointer, |
| size_t deserializeSize, |
| WriteHandle** writeHandle) = 0; |
| |
| class DAWN_WIRE_EXPORT ReadHandle { |
| public: |
| ReadHandle(); |
| virtual ~ReadHandle(); |
| |
| // Return the size of the command serialized if |
| // SerializeDataUpdate is called with the same offset/size args |
| virtual size_t SizeOfSerializeDataUpdate(size_t offset, size_t size) = 0; |
| |
| // Gets called when a MapReadCallback resolves. |
| // Serialize the data update for the range (offset, offset + size) into |
| // |serializePointer| to the client There could be nothing to be serialized (if |
| // using shared memory) |
| virtual void SerializeDataUpdate(const void* data, |
| size_t offset, |
| size_t size, |
| void* serializePointer) = 0; |
| |
| private: |
| ReadHandle(const ReadHandle&) = delete; |
| ReadHandle& operator=(const ReadHandle&) = delete; |
| }; |
| |
| class DAWN_WIRE_EXPORT WriteHandle { |
| public: |
| WriteHandle(); |
| virtual ~WriteHandle(); |
| |
| // Set the target for writes from the client. DeserializeFlush should copy data |
| // into the target. |
| void SetTarget(void* data); |
| // Set Staging data length for OOB check |
| void SetDataLength(size_t dataLength); |
| |
| // This function takes in the serialized result of |
| // client::MemoryTransferService::WriteHandle::SerializeDataUpdate. |
| // Needs to check potential offset/size OOB and overflow |
| virtual bool DeserializeDataUpdate(const void* deserializePointer, |
| size_t deserializeSize, |
| size_t offset, |
| size_t size) = 0; |
| |
| protected: |
| void* mTargetData = nullptr; |
| size_t mDataLength = 0; |
| |
| private: |
| WriteHandle(const WriteHandle&) = delete; |
| WriteHandle& operator=(const WriteHandle&) = delete; |
| }; |
| |
| private: |
| MemoryTransferService(const MemoryTransferService&) = delete; |
| MemoryTransferService& operator=(const MemoryTransferService&) = delete; |
| }; |
| } // namespace server |
| |
| } // namespace dawn::wire |
| |
| #endif // INCLUDE_DAWN_WIRE_WIRESERVER_H_ |