82 lines
2.5 KiB
C#
82 lines
2.5 KiB
C#
/***************************************************************************
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* NativeReader.cs
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* -------------------
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* begin : May 1, 2002
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* copyright : (C) The RunUO Software Team
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* email : info@runuo.com
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*
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* $Id$
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*
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***************************************************************************/
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/***************************************************************************
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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***************************************************************************/
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using System;
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using System.Runtime.InteropServices;
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using System.Threading;
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namespace Server
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{
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public static class NativeReader
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{
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private static readonly INativeReader m_NativeReader;
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static NativeReader()
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{
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if (Core.Unix)
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m_NativeReader = new NativeReaderUnix();
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else
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m_NativeReader = new NativeReaderWin32();
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}
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public static unsafe void Read(IntPtr ptr, void* buffer, int length)
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{
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m_NativeReader.Read(ptr, buffer, length);
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}
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}
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public interface INativeReader
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{
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unsafe void Read(IntPtr ptr, void* buffer, int length);
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}
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public sealed class NativeReaderWin32 : INativeReader
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{
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public unsafe void Read(IntPtr ptr, void* buffer, int length)
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{
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uint lpNumberOfBytesRead = 0;
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UnsafeNativeMethods.ReadFile(ptr, buffer, (uint)length, ref lpNumberOfBytesRead, null);
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}
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internal static class UnsafeNativeMethods
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{
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/*[DllImport("kernel32")]
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internal unsafe static extern int _lread(IntPtr hFile, void* lpBuffer, int wBytes);*/
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[DllImport("kernel32")]
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internal static extern unsafe bool ReadFile(IntPtr hFile, void* lpBuffer, uint nNumberOfBytesToRead,
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ref uint lpNumberOfBytesRead, NativeOverlapped* lpOverlapped);
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}
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}
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public sealed class NativeReaderUnix : INativeReader
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{
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public unsafe void Read(IntPtr ptr, void* buffer, int length)
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{
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UnsafeNativeMethods.read(ptr, buffer, length);
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}
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internal static class UnsafeNativeMethods
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{
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[DllImport("libc")]
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internal static extern unsafe int read(IntPtr ptr, void* buffer, int length);
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}
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}
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}
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