Get the correct library loading functions at runtime #894
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Get the correct library loading functions at runtime
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,153 @@ | ||
| using System; | ||
| using System.Runtime.InteropServices; | ||
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| namespace Python.Runtime.Platform | ||
| { | ||
| interface ILibraryLoader | ||
| { | ||
| IntPtr Load(string dllToLoad); | ||
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| IntPtr GetFunction(IntPtr hModule, string procedureName); | ||
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| bool Free(IntPtr hModule); | ||
| } | ||
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| static class LibraryLoader | ||
| { | ||
| public static ILibraryLoader Get(OperatingSystemType os) | ||
| { | ||
| switch (os) | ||
| { | ||
| case OperatingSystemType.Windows: | ||
| return new WindowsLoader(); | ||
| case OperatingSystemType.Darwin: | ||
| return new DarwinLoader(); | ||
| case OperatingSystemType.Linux: | ||
| return new LinuxLoader(); | ||
| default: | ||
| throw new Exception($"This operating system ({os}) is not supported"); | ||
| } | ||
| } | ||
| } | ||
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| class LinuxLoader : ILibraryLoader | ||
| { | ||
| private static int RTLD_NOW = 0x2; | ||
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| private static int RTLD_GLOBAL = 0x100; | ||
| private static IntPtr RTLD_DEFAULT = IntPtr.Zero; | ||
| private const string NativeDll = "libdl.so"; | ||
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| public IntPtr Load(string fileName) | ||
| { | ||
| return dlopen($"lib{fileName}.so", RTLD_NOW | RTLD_GLOBAL); | ||
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| } | ||
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| public bool Free(IntPtr handle) | ||
| { | ||
| dlclose(handle); | ||
| return true; | ||
| } | ||
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| public IntPtr GetFunction(IntPtr dllHandle, string name) | ||
| { | ||
| // look in the exe if dllHandle is NULL | ||
| if (dllHandle == IntPtr.Zero) | ||
| { | ||
| dllHandle = RTLD_DEFAULT; | ||
| } | ||
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| // clear previous errors if any | ||
| dlerror(); | ||
| IntPtr res = dlsym(dllHandle, name); | ||
| IntPtr errPtr = dlerror(); | ||
| if (errPtr != IntPtr.Zero) | ||
| { | ||
| throw new Exception("dlsym: " + Marshal.PtrToStringAnsi(errPtr)); | ||
| } | ||
| return res; | ||
| } | ||
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| [DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)] | ||
| public static extern IntPtr dlopen(String fileName, int flags); | ||
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| [DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)] | ||
| private static extern IntPtr dlsym(IntPtr handle, String symbol); | ||
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| [DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl)] | ||
| private static extern int dlclose(IntPtr handle); | ||
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| [DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl)] | ||
| private static extern IntPtr dlerror(); | ||
| } | ||
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| class DarwinLoader : ILibraryLoader | ||
| { | ||
| private static int RTLD_NOW = 0x2; | ||
| private static int RTLD_GLOBAL = 0x8; | ||
| private const string NativeDll = "/usr/lib/libSystem.dylib"; | ||
| private static IntPtr RTLD_DEFAULT = new IntPtr(-2); | ||
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| public IntPtr Load(string fileName) | ||
| { | ||
| return dlopen($"lib{fileName}.dylib", RTLD_NOW | RTLD_GLOBAL); | ||
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| } | ||
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| public bool Free(IntPtr handle) | ||
| { | ||
| dlclose(handle); | ||
| return true; | ||
| } | ||
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| public IntPtr GetFunction(IntPtr dllHandle, string name) | ||
| { | ||
| // look in the exe if dllHandle is NULL | ||
| if (dllHandle == IntPtr.Zero) | ||
| { | ||
| dllHandle = RTLD_DEFAULT; | ||
| } | ||
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| // clear previous errors if any | ||
| dlerror(); | ||
| IntPtr res = dlsym(dllHandle, name); | ||
| IntPtr errPtr = dlerror(); | ||
| if (errPtr != IntPtr.Zero) | ||
| { | ||
| throw new Exception("dlsym: " + Marshal.PtrToStringAnsi(errPtr)); | ||
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| } | ||
| return res; | ||
| } | ||
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| [DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)] | ||
| public static extern IntPtr dlopen(String fileName, int flags); | ||
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| [DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)] | ||
| private static extern IntPtr dlsym(IntPtr handle, String symbol); | ||
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| [DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl)] | ||
| private static extern int dlclose(IntPtr handle); | ||
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| [DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl)] | ||
| private static extern IntPtr dlerror(); | ||
| } | ||
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| class WindowsLoader : ILibraryLoader | ||
| { | ||
| private const string NativeDll = "kernel32.dll"; | ||
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| [DllImport(NativeDll)] | ||
| static extern IntPtr LoadLibrary(string dllToLoad); | ||
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| public IntPtr Load(string dllToLoad) => WindowsLoader.LoadLibrary(dllToLoad); | ||
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| [DllImport(NativeDll)] | ||
| static extern IntPtr GetProcAddress(IntPtr hModule, string procedureName); | ||
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| public IntPtr GetFunction(IntPtr hModule, string procedureName) => WindowsLoader.GetProcAddress(hModule, procedureName); | ||
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| [DllImport(NativeDll)] | ||
| static extern bool FreeLibrary(IntPtr hModule); | ||
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| public bool Free(IntPtr hModule) => WindowsLoader.FreeLibrary(hModule); | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,22 @@ | ||
| namespace Python.Runtime.Platform | ||
| { | ||
| public enum MachineType | ||
| { | ||
| i386, | ||
| x86_64, | ||
| armv7l, | ||
| armv8, | ||
| Other | ||
| }; | ||
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| /// <summary> | ||
| /// Operating system type as reported by Python. | ||
| /// </summary> | ||
| public enum OperatingSystemType | ||
| { | ||
| Windows, | ||
| Darwin, | ||
| Linux, | ||
| Other | ||
| } | ||
| } |
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