68 lines
1.9 KiB
C#
68 lines
1.9 KiB
C#
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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{
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m_NativeReader = new NativeReaderUnix();
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}
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else
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{
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m_NativeReader = new NativeReaderWin32();
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}
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}
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public static unsafe void Read(IntPtr p, void* buffer, int length)
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{
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m_NativeReader.Read(p, 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 p, 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 p, void* buffer, int length)
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{
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uint lpNumberOfBytesRead = 0;
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UnsafeNativeMethods.ReadFile(p, 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(
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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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}
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public sealed class NativeReaderUnix : INativeReader
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{
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public unsafe void Read(IntPtr p, void* buffer, int length)
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{
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_ = UnsafeNativeMethods.read(p, 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 p, void* buffer, int length);
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}
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}
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}
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