75 lines
2.3 KiB
C#
75 lines
2.3 KiB
C#
using System;
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using System.Runtime.InteropServices;
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namespace MonoGame.Utilities
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{
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internal class FuncLoader
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{
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private class Windows
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{
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[DllImport("kernel32", CharSet = CharSet.Ansi, ExactSpelling = true, SetLastError = true)]
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public static extern IntPtr GetProcAddress(IntPtr hModule, string procName);
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[DllImport("kernel32", SetLastError = true, CharSet = CharSet.Unicode)]
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public static extern IntPtr LoadLibraryW(string lpszLib);
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}
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private class Linux
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{
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[DllImport("libdl.so.2")]
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public static extern IntPtr dlopen(string path, int flags);
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[DllImport("libdl.so.2")]
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public static extern IntPtr dlsym(IntPtr handle, string symbol);
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}
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private class OSX
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{
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[DllImport("/usr/lib/libSystem.dylib")]
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public static extern IntPtr dlopen(string path, int flags);
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[DllImport("/usr/lib/libSystem.dylib")]
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public static extern IntPtr dlsym(IntPtr handle, string symbol);
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}
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private const int RTLD_LAZY = 0x0001;
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public static IntPtr LoadLibrary(string libname)
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{
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if (CurrentPlatform.OS == OS.Windows)
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return Windows.LoadLibraryW(libname);
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if (CurrentPlatform.OS == OS.MacOSX)
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return OSX.dlopen(libname, RTLD_LAZY);
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return Linux.dlopen(libname, RTLD_LAZY);
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}
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public static T LoadFunction<T>(IntPtr library, string function, bool throwIfNotFound = false)
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{
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var ret = IntPtr.Zero;
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if (CurrentPlatform.OS == OS.Windows)
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ret = Windows.GetProcAddress(library, function);
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else if (CurrentPlatform.OS == OS.MacOSX)
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ret = OSX.dlsym(library, function);
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else
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ret = Linux.dlsym(library, function);
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if (ret == IntPtr.Zero)
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{
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if (throwIfNotFound)
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throw new EntryPointNotFoundException(function);
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return default(T);
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}
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#if NETSTANDARD
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return Marshal.GetDelegateForFunctionPointer<T>(ret);
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#else
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return (T)(object)Marshal.GetDelegateForFunctionPointer(ret, typeof(T));
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#endif
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}
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}
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}
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