P/Invoke coarsening

I wonder whether .NET CLR supports P/Invoke coarsening.

For example if开发者_运维技巧 we have three subsequent P/Invoke calls that deal with blittable types:

Native.DrawPolygon(1.0f, 1.0);
Native.DrawPolygon(2.0f, 1.0);
Native.DrawPolygon(3.0f, 1.0);

then we could perform managed-to-unmanaged context switch for the whole block just once, instead of doing it pointlessly three times.

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No, the framework doesn't do this. You would have to build your API to minimise the managed-to-unmanaged switches.