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@ -1,4 +1,4 @@ |
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// Copyright 2018 yuzu emulator team |
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// Copyright 2019 yuzu emulator team |
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// Licensed under GPLv2 or any later version |
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// Licensed under GPLv2 or any later version |
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// Refer to the license.txt file included. |
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// Refer to the license.txt file included. |
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@ -11,7 +11,7 @@ |
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namespace Service::Time { |
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namespace Service::Time { |
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class SharedMemory { |
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class SharedMemory { |
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public: |
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public: |
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SharedMemory(Core::System& system); |
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explicit SharedMemory(Core::System& system); |
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~SharedMemory(); |
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~SharedMemory(); |
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// Return the shared memory handle |
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// Return the shared memory handle |
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@ -21,51 +21,54 @@ public: |
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void SetStandardSteadyClockTimepoint(const SteadyClockTimePoint& timepoint); |
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void SetStandardSteadyClockTimepoint(const SteadyClockTimePoint& timepoint); |
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void SetStandardLocalSystemClockContext(const SystemClockContext& context); |
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void SetStandardLocalSystemClockContext(const SystemClockContext& context); |
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void SetStandardNetworkSystemClockContext(const SystemClockContext& context); |
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void SetStandardNetworkSystemClockContext(const SystemClockContext& context); |
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void SetStandardUserSystemClockAutomaticCorrectionEnabled(const bool enabled); |
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void SetStandardUserSystemClockAutomaticCorrectionEnabled(bool enabled); |
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// Pull from memory barriers in the shared memory |
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// Pull from memory barriers in the shared memory |
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SteadyClockTimePoint GetStandardSteadyClockTimepoint() const; |
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SystemClockContext GetStandardLocalSystemClockContext() const; |
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SystemClockContext GetStandardNetworkSystemClockContext() const; |
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bool GetStandardUserSystemClockAutomaticCorrectionEnabled() const; |
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SteadyClockTimePoint GetStandardSteadyClockTimepoint(); |
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SystemClockContext GetStandardLocalSystemClockContext(); |
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SystemClockContext GetStandardNetworkSystemClockContext(); |
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bool GetStandardUserSystemClockAutomaticCorrectionEnabled(); |
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// TODO(ogniK): We have to properly simulate memory barriers, how are we going to do this? |
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// TODO(ogniK): We have to properly simulate memory barriers, how are we going to do this? |
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template <typename T> |
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template <typename T, std::size_t Offset> |
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struct MemoryBarrier { |
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struct MemoryBarrier { |
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static_assert(std::is_trivially_constructible_v<T>, "T must be trivially constructable"); |
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u32_le read_attempt{}; |
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u32_le read_attempt{}; |
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T data[2]{}; |
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std::array<T, 2> data{}; |
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// These are not actually memory barriers at the moment as we don't have multicore and all |
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// These are not actually memory barriers at the moment as we don't have multicore and all |
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// HLE is mutexed. This will need to properly be implemented when we start updating the time |
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// HLE is mutexed. This will need to properly be implemented when we start updating the time |
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// points on threads. As of right now, we'll be updated both values synchronously and just |
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// points on threads. As of right now, we'll be updated both values synchronously and just |
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// incrementing the read_attempt to indicate that we waited. |
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// incrementing the read_attempt to indicate that we waited. |
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void StoreData(T data_to_store) { |
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void StoreData(u8* shared_memory, T data_to_store) { |
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std::memcpy(this, shared_memory + Offset, sizeof(*this)); |
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read_attempt++; |
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read_attempt++; |
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data[read_attempt & 1] = data_to_store; |
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data[read_attempt & 1] = data_to_store; |
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std::memcpy(shared_memory + Offset, this, sizeof(*this)); |
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} |
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} |
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// For reading we're just going to read the last stored value. If there was no value stored |
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// For reading we're just going to read the last stored value. If there was no value stored |
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// it will just end up reading an empty value as intended. |
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// it will just end up reading an empty value as intended. |
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T ReadData() const { |
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T ReadData(u8* shared_memory) { |
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std::memcpy(this, shared_memory + Offset, sizeof(*this)); |
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return data[(read_attempt - 1) & 1]; |
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return data[(read_attempt - 1) & 1]; |
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} |
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} |
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}; |
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}; |
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// Shared memory format |
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// Shared memory format |
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struct Format { |
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struct Format { |
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MemoryBarrier<SteadyClockTimePoint> standard_steady_clock_timepoint; |
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MemoryBarrier<SystemClockContext> standard_local_system_clock_context; |
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MemoryBarrier<SystemClockContext> standard_network_system_clock_context; |
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MemoryBarrier<u8> standard_user_system_clock_automatic_correction; |
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MemoryBarrier<SteadyClockTimePoint, 0x0> standard_steady_clock_timepoint; |
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MemoryBarrier<SystemClockContext, 0x38> standard_local_system_clock_context; |
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MemoryBarrier<SystemClockContext, 0x80> standard_network_system_clock_context; |
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MemoryBarrier<bool, 0xc8> standard_user_system_clock_automatic_correction; |
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u32_le format_version; |
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u32_le format_version; |
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}; |
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}; |
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static_assert(sizeof(Format) == 0xd8, "Format is an invalid size"); |
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static_assert(sizeof(Format) == 0xd8, "Format is an invalid size"); |
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private: |
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private: |
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const std::size_t SHARED_MEMORY_SIZE = 0x1000; |
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Kernel::SharedPtr<Kernel::SharedMemory> shared_memory_holder{}; |
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Kernel::SharedPtr<Kernel::SharedMemory> shared_memory_holder{}; |
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Core::System& system; |
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Core::System& system; |
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Format* shared_memory_format; |
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Format shared_memory_format{}; |
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}; |
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}; |
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} // namespace Service::Time |
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} // namespace Service::Time |