68 lines
1.5 KiB
C#
68 lines
1.5 KiB
C#
using System;
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using System.IO;
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using System.Reflection;
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namespace BizHawk.Common.BizInvoke
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{
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public class DynamicLibraryImportResolver : IImportResolver, IDisposable
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{
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private IntPtr _p;
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private readonly OSTailoredCode.ILinkedLibManager libLoader = OSTailoredCode.LinkedLibManager;
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public DynamicLibraryImportResolver(string dllName)
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{
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if (OSTailoredCode.CurrentOS != OSTailoredCode.DistinctOS.Windows) ResolveFilePath(ref dllName);
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_p = libLoader.LoadPlatformSpecific(dllName);
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if (_p == IntPtr.Zero) throw new InvalidOperationException($"null pointer returned by {nameof(libLoader.LoadPlatformSpecific)}");
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}
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private string[] SearchPaths = new[]
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{
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"/",
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"/dll/",
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"/usr/lib/"
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};
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/// <remarks>this is needed to actually find the DLL properly on Unix</remarks>
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private void ResolveFilePath(ref string dllName)
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{
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if (dllName.IndexOf('/') != -1) return; // relative paths shouldn't contain '/'
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var currDir = Path.GetDirectoryName(Assembly.GetExecutingAssembly().CodeBase).Replace("file:", "");
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var dll = dllName;
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foreach (var p in SearchPaths)
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{
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dll = currDir + p + dllName;
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if (File.Exists(dll))
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{
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dllName = dll;
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return;
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}
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}
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}
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public IntPtr Resolve(string entryPoint)
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{
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return libLoader.GetProcAddr(_p, entryPoint);
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}
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private void Free()
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{
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if (_p == IntPtr.Zero) return;
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libLoader.FreePlatformSpecific(_p);
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_p = IntPtr.Zero;
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}
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public void Dispose()
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{
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Free();
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GC.SuppressFinalize(this);
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}
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~DynamicLibraryImportResolver()
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{
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Free();
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}
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}
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}
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