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time: implement ContinuousAdjustmentTimePoint

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This commit is contained in:
Liam 2023-05-11 21:05:27 -04:00
parent 182221b9ff
commit a22c5a3880
3 changed files with 34 additions and 2 deletions
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12
src/core/hle/service/time/clock_types.h
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@ -59,6 +59,18 @@ static_assert(sizeof(SystemClockContext) == 0x20, "SystemClockContext is incorre
static_assert(std::is_trivially_copyable_v<SystemClockContext>,
"SystemClockContext must be trivially copyable");
struct ContinuousAdjustmentTimePoint {
s64 measurement_offset;
s64 diff_scale;
u32 shift_amount;
s64 lower;
s64 upper;
Common::UUID clock_source_id;
};
static_assert(sizeof(ContinuousAdjustmentTimePoint) == 0x38);
static_assert(std::is_trivially_copyable_v<ContinuousAdjustmentTimePoint>,
"ContinuousAdjustmentTimePoint must be trivially copyable");
/// https://switchbrew.org/wiki/Glue_services#TimeSpanType
struct TimeSpanType {
s64 nanoseconds{};

19
src/core/hle/service/time/time_sharedmemory.cpp
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@ -30,6 +30,25 @@ void SharedMemory::SetupStandardSteadyClock(const Common::UUID& clock_source_id,
}
void SharedMemory::UpdateLocalSystemClockContext(const Clock::SystemClockContext& context) {
// lower and upper are related to the measurement point for the steady time point,
// and compare equal on boot
const s64 time_point_ns = context.steady_time_point.time_point * 1'000'000'000LL;
// This adjusts for some sort of time skew
// Both 0 on boot
const s64 diff_scale = 0;
const u32 shift_amount = 0;
const Clock::ContinuousAdjustmentTimePoint adjustment{
.measurement_offset = system.CoreTiming().GetGlobalTimeNs().count(),
.diff_scale = diff_scale,
.shift_amount = shift_amount,
.lower = time_point_ns,
.upper = time_point_ns,
.clock_source_id = context.steady_time_point.clock_source_id,
};
StoreToLockFreeAtomicType(&GetFormat()->continuous_adjustment_timepoint, adjustment);
StoreToLockFreeAtomicType(&GetFormat()->standard_local_system_clock_context, context);
}

5
src/core/hle/service/time/time_sharedmemory.h
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@ -65,14 +65,15 @@ public:
LockFreeAtomicType<Clock::SystemClockContext> standard_local_system_clock_context;
LockFreeAtomicType<Clock::SystemClockContext> standard_network_system_clock_context;
LockFreeAtomicType<bool> is_standard_user_system_clock_automatic_correction_enabled;
u32 format_version;
LockFreeAtomicType<Clock::ContinuousAdjustmentTimePoint> continuous_adjustment_timepoint;
};
static_assert(offsetof(Format, standard_steady_clock_timepoint) == 0x0);
static_assert(offsetof(Format, standard_local_system_clock_context) == 0x38);
static_assert(offsetof(Format, standard_network_system_clock_context) == 0x80);
static_assert(offsetof(Format, is_standard_user_system_clock_automatic_correction_enabled) ==
0xc8);
static_assert(sizeof(Format) == 0xd8, "Format is an invalid size");
static_assert(offsetof(Format, continuous_adjustment_timepoint) == 0xd0);
static_assert(sizeof(Format) == 0x148, "Format is an invalid size");
void SetupStandardSteadyClock(const Common::UUID& clock_source_id,
Clock::TimeSpanType current_time_point);