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Span を DllImport に渡す

Last updated at 2019-11-24Posted at 2019-11-24

// c の定義
SAMPLE_EXPORT void SAMPLE_NumberSequence(unsigned char *bytes, int length);

[DllImport(DllName, EntryPoint = "SAMPLE_NumberSequence")]
public static extern void SAMPLE_NumberSequence_UseRef(ref byte bytes, int length);

と書いておいて

static void StackSample()
{
    Span<byte> span = stackalloc byte[10];
    SampleImport.SAMPLE_NumberSequence_UseRef(ref span[0], span.Length);
    Console.WriteLine(ToString(span));
}

ref span[0] で先頭要素へのリファレンスを渡すことでできた。

実験コード

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