UnsafeNativeMethods.cs

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using System;
using System.Runtime.InteropServices;
 
namespace Microsoft.Xna.Framework;
 
internal static class UnsafeNativeMethods
{
    public struct SecurityAttributes
    {
        private int Length;
 
        private IntPtr SecurityDescriptor;
 
        private int InheritHandle;
 
        public unsafe SecurityAttributes(bool inheritHandle)
        {
            Length = sizeof(SecurityAttributes);
            SecurityDescriptor = IntPtr.Zero;
            InheritHandle = (inheritHandle ? 1 : 0);
        }
    }
 
    public const int INFINITE = -1;
 
    public const uint STATUS_DLL_NOT_FOUND = 3221225781u;
 
    public const int PAGE_READONLY = 2;
 
    public const int PAGE_READWRITE = 4;
 
    public const int PAGE_WRITECOPY = 8;
 
    public const int FILE_MAP_WRITE = 2;
 
    public const int FILE_MAP_READ = 4;
 
    public static readonly IntPtr INVALID_HANDLE_VALUE = new IntPtr(-1);
 
    [DllImport("Kernel32.dll")]
    public static extern int CloseHandle(IntPtr hObject);
 
    [DllImport("Kernel32.dll")]
    public static extern IntPtr CreateEvent(ref SecurityAttributes lpEventAttributes, [MarshalAs(UnmanagedType.Bool)] bool bManualReset, [MarshalAs(UnmanagedType.Bool)] bool bInitialState, IntPtr lpName);
 
    [DllImport("Kernel32.dll")]
    public static extern int SetEvent(IntPtr hEvent);
 
    [DllImport("Kernel32.dll")]
    public unsafe static extern int WaitForMultipleObjects(int nCount, IntPtr* handles, [MarshalAs(UnmanagedType.Bool)] bool bWaitAll, int dwMilliseconds);
 
    [DllImport("Kernel32.dll")]
    public unsafe static extern IntPtr CreateFileMapping(IntPtr hFile, SecurityAttributes* lpFileMappingAttributes, int flProtect, int dwMaximumSizeHigh, int dwMaximumSizeLow, string lpName);
 
    [DllImport("Kernel32.dll")]
    public static extern IntPtr MapViewOfFile(IntPtr hFileMappingObject, int dwDesiredAccess, int dwFileOffsetHigh, int dwFileOffsetLow, int dwNumberOfBytesToMap);
 
    [DllImport("Kernel32.dll")]
    public static extern int UnmapViewOfFile(IntPtr lpBaseAddress);
}