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using System;
using System.Runtime.InteropServices;
namespace Steamworks;
public class ISteamMatchmakingPingResponse
{
public delegate void ServerResponded(gameserveritem_t server);
public delegate void ServerFailedToRespond();
[UnmanagedFunctionPointer(CallingConvention.StdCall)]
private delegate void InternalServerResponded(gameserveritem_t server);
[UnmanagedFunctionPointer(CallingConvention.StdCall)]
private delegate void InternalServerFailedToRespond();
[StructLayout(LayoutKind.Sequential)]
private class VTable
{
[NonSerialized]
[MarshalAs(UnmanagedType.FunctionPtr)]
public InternalServerResponded m_VTServerResponded;
[NonSerialized]
[MarshalAs(UnmanagedType.FunctionPtr)]
public InternalServerFailedToRespond m_VTServerFailedToRespond;
}
private VTable m_VTable;
private IntPtr m_pVTable;
private GCHandle m_pGCHandle;
private ServerResponded m_ServerResponded;
private ServerFailedToRespond m_ServerFailedToRespond;
public ISteamMatchmakingPingResponse(ServerResponded onServerResponded, ServerFailedToRespond onServerFailedToRespond)
{
if (onServerResponded == null || onServerFailedToRespond == null)
{
throw new ArgumentNullException();
}
m_ServerResponded = onServerResponded;
m_ServerFailedToRespond = onServerFailedToRespond;
m_VTable = new VTable
{
m_VTServerResponded = InternalOnServerResponded,
m_VTServerFailedToRespond = InternalOnServerFailedToRespond
};
m_pVTable = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(VTable)));
Marshal.StructureToPtr(m_VTable, m_pVTable, fDeleteOld: false);
m_pGCHandle = GCHandle.Alloc(m_pVTable, GCHandleType.Pinned);
}
~ISteamMatchmakingPingResponse()
{
if (m_pVTable != IntPtr.Zero)
{
Marshal.FreeHGlobal(m_pVTable);
}
if (m_pGCHandle.IsAllocated)
{
m_pGCHandle.Free();
}
}
private void InternalOnServerResponded(gameserveritem_t server)
{
m_ServerResponded(server);
}
private void InternalOnServerFailedToRespond()
{
m_ServerFailedToRespond();
}
public static explicit operator IntPtr(ISteamMatchmakingPingResponse that)
{
return that.m_pGCHandle.AddrOfPinnedObject();
}
}
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