44 lines
1.3 KiB
C#
44 lines
1.3 KiB
C#
using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.Runtime.CompilerServices;
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using System.Runtime.InteropServices;
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namespace Foodsoft.Alpm
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{
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internal struct EnumerableWrapper<TImpl, TElement, THandle> : IEnumerable<TElement> where TImpl : struct,
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IItemsReader<TElement, THandle>
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where THandle : SafeHandle
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{
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private TImpl _impl;
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public EnumerableWrapper(TImpl impl)
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{
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_impl = impl;
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}
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public IEnumerator<TElement> GetEnumerator()
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{
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var handle = _impl.Handle;
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var release = false;
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RuntimeHelpers.PrepareConstrainedRegions();
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try
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{
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handle.DangerousAddRef(ref release);
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if (!release) throw new ObjectDisposedException(_impl.GetType().FullName);
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for (var list = _impl.GetItems(); list != IntPtr.Zero; list = Wrapper.ListNext(list))
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{
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yield return _impl.PtrToItem(Wrapper.ListData(list));
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}
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}
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finally
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{
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if (release)
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handle.DangerousRelease();
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}
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}
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IEnumerator IEnumerable.GetEnumerator() => GetEnumerator();
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}
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} |