Merge pull request #10244 from liamwhite/lower-upper
time: implement ContinuousAdjustmentTimePoint
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commit
9c739f1506
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@ -59,6 +59,18 @@ static_assert(sizeof(SystemClockContext) == 0x20, "SystemClockContext is incorre
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static_assert(std::is_trivially_copyable_v<SystemClockContext>,
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"SystemClockContext must be trivially copyable");
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struct ContinuousAdjustmentTimePoint {
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s64 measurement_offset;
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s64 diff_scale;
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u32 shift_amount;
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s64 lower;
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s64 upper;
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Common::UUID clock_source_id;
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};
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static_assert(sizeof(ContinuousAdjustmentTimePoint) == 0x38);
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static_assert(std::is_trivially_copyable_v<ContinuousAdjustmentTimePoint>,
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"ContinuousAdjustmentTimePoint must be trivially copyable");
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/// https://switchbrew.org/wiki/Glue_services#TimeSpanType
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struct TimeSpanType {
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s64 nanoseconds{};
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@ -30,6 +30,25 @@ void SharedMemory::SetupStandardSteadyClock(const Common::UUID& clock_source_id,
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}
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void SharedMemory::UpdateLocalSystemClockContext(const Clock::SystemClockContext& context) {
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// lower and upper are related to the measurement point for the steady time point,
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// and compare equal on boot
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const s64 time_point_ns = context.steady_time_point.time_point * 1'000'000'000LL;
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// This adjusts for some sort of time skew
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// Both 0 on boot
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const s64 diff_scale = 0;
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const u32 shift_amount = 0;
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const Clock::ContinuousAdjustmentTimePoint adjustment{
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.measurement_offset = system.CoreTiming().GetGlobalTimeNs().count(),
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.diff_scale = diff_scale,
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.shift_amount = shift_amount,
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.lower = time_point_ns,
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.upper = time_point_ns,
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.clock_source_id = context.steady_time_point.clock_source_id,
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};
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StoreToLockFreeAtomicType(&GetFormat()->continuous_adjustment_timepoint, adjustment);
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StoreToLockFreeAtomicType(&GetFormat()->standard_local_system_clock_context, context);
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}
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@ -65,14 +65,15 @@ public:
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LockFreeAtomicType<Clock::SystemClockContext> standard_local_system_clock_context;
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LockFreeAtomicType<Clock::SystemClockContext> standard_network_system_clock_context;
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LockFreeAtomicType<bool> is_standard_user_system_clock_automatic_correction_enabled;
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u32 format_version;
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LockFreeAtomicType<Clock::ContinuousAdjustmentTimePoint> continuous_adjustment_timepoint;
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};
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static_assert(offsetof(Format, standard_steady_clock_timepoint) == 0x0);
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static_assert(offsetof(Format, standard_local_system_clock_context) == 0x38);
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static_assert(offsetof(Format, standard_network_system_clock_context) == 0x80);
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static_assert(offsetof(Format, is_standard_user_system_clock_automatic_correction_enabled) ==
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0xc8);
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static_assert(sizeof(Format) == 0xd8, "Format is an invalid size");
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static_assert(offsetof(Format, continuous_adjustment_timepoint) == 0xd0);
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static_assert(sizeof(Format) == 0x148, "Format is an invalid size");
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void SetupStandardSteadyClock(const Common::UUID& clock_source_id,
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Clock::TimeSpanType current_time_point);
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