52 lines
809 B
C++
52 lines
809 B
C++
#include "Numeric/Random.h"
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#include "Templates/Atomic.h"
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NAMESPACE_REDCRAFT_BEGIN
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NAMESPACE_MODULE_BEGIN(Redcraft)
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NAMESPACE_MODULE_BEGIN(Utility)
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NAMESPACE_BEGIN(Math)
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NAMESPACE_UNNAMED_BEGIN
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TAtomic<uint32> RandState = 586103306;
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NAMESPACE_UNNAMED_END
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uint32 Seed(uint32 InSeed)
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{
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uint32 OldSeed = RandState.Load(EMemoryOrder::Relaxed);
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if (InSeed != 0) RandState.Store(InSeed, EMemoryOrder::Relaxed);
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return OldSeed;
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}
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uint32 Rand()
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{
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uint32 Result;
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RandState.FetchFn(
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[&Result](uint32 Value)
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{
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Result = Value;
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Result ^= Result << 13;
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Result ^= Result >> 17;
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Result ^= Result << 5;
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return Result;
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},
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EMemoryOrder::Relaxed
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);
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return Result % 0x7FFFFFFF;
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}
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NAMESPACE_END(Math)
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NAMESPACE_MODULE_END(Utility)
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NAMESPACE_MODULE_END(Redcraft)
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NAMESPACE_REDCRAFT_END
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