28 lines
863 B
C#
28 lines
863 B
C#
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using System;
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using System.Runtime.InteropServices;
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namespace GLib
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{
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public static class AbiStructExtension
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{
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public static N BaseOverride<N>(this AbiStruct class_abi, GType gtype, string fieldname) where N : Delegate
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{
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N unmanaged = null;
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unsafe {
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IntPtr raw_ptr = IntPtr.Zero;
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while (raw_ptr == IntPtr.Zero && GType.IsManaged(gtype)) {
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gtype = gtype.GetThresholdType();
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var abi_ptr = (IntPtr*) (((long) gtype.GetClassPtr()) + (long) class_abi.GetFieldOffset(fieldname));
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raw_ptr = *abi_ptr;
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}
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if (raw_ptr != IntPtr.Zero) {
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unmanaged = Marshal.GetDelegateForFunctionPointer<N>(raw_ptr);
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}
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}
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return unmanaged;
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}
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}
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}
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