85 lines
1.7 KiB
C#
85 lines
1.7 KiB
C#
using System;
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using System.Runtime.InteropServices;
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using BizHawk.Common;
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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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public DynamicLibraryImportResolver(string dllName)
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{
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#if !MONO
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_p = Win32.LoadLibrary(dllName);
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#else
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// TODO: how can we read name remaps out of app.confg <dllmap> ?
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_p = Libdl.dlopen(dllName, Libdl.RTLD_NOW);
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#endif
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if (_p == IntPtr.Zero)
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{
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throw new InvalidOperationException("LoadLibrary returned NULL");
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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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#if !MONO
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return Win32.GetProcAddress(_p, entryPoint);
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#else
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return Libdl.dlsym(_p, entryPoint);
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#endif
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}
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private void Free()
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{
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if (_p != IntPtr.Zero)
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{
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#if !MONO
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Win32.FreeLibrary(_p);
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#else
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Libdl.dlclose(_p);
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#endif
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_p = IntPtr.Zero;
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}
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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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#if !MONO
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private static class Win32
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{
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[DllImport("kernel32.dll")]
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public static extern IntPtr LoadLibrary(string dllToLoad);
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[DllImport("kernel32.dll")]
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public static extern IntPtr GetProcAddress(IntPtr hModule, string procedureName);
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[DllImport("kernel32.dll")]
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public static extern bool FreeLibrary(IntPtr hModule);
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}
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#else
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private static class Libdl
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{
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[DllImport("libdl.so")]
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public static extern IntPtr dlopen(string filename, int flags);
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[DllImport("libdl.so")]
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public static extern IntPtr dlsym(IntPtr handle, string symbol);
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[DllImport("libdl.so")]
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public static extern int dlclose(IntPtr handle);
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public const int RTLD_NOW = 2;
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}
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#endif
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}
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}
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