public static T Result <T>(SteamAPICall_t handle) where T : new()
{
var t = new T();
var size = Marshal.SizeOf(t);
System.IntPtr unmanagedAddr = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(t, unmanagedAddr, true);
bool failed;
Steamworks.SteamUtils.GetAPICallResult(handle, unmanagedAddr, (int)size, CallbackIdentities.GetCallbackIdentity(typeof(T)), out failed);
t = (T)Marshal.PtrToStructure(unmanagedAddr, typeof(T));
Marshal.FreeHGlobal(unmanagedAddr);
unmanagedAddr = IntPtr.Zero;
return(t);
}
// Steamworks.NET Specific
private void BuildCCallbackBase()
{
_vTable = new CCallbackBaseVTable
{
RunCallResult = OnRunCallResult,
RunCallback = OnRunCallback,
GetCallbackSizeBytes = OnGetCallbackSizeBytes
};
_pVTable = Marshal.AllocHGlobal(Marshal.SizeOf(typeof(CCallbackBaseVTable)));
Marshal.StructureToPtr(_vTable, _pVTable, false);
_callbackBase = new CallbackBase
{
VFPtr = _pVTable,
CallbackFlags = 0,
Callback = CallbackIdentities.GetCallbackIdentity(typeof(T))
};
_pCCallbackBase = GCHandle.Alloc(_callbackBase, GCHandleType.Pinned);
}
// Manual registration of the callback
public void Register(DispatchDelegate func)
{
if (func == null)
{
throw new Exception("Callback function must not be null.");
}
if ((_callbackBase.CallbackFlags & CallbackBase.ECallbackFlagsRegistered) == CallbackBase.ECallbackFlagsRegistered)
{
Unregister();
}
if (_gameServer)
{
SetGameserverFlag();
}
Func = func;
// ECallbackFlagsRegistered is set by SteamAPI_RegisterCallback.
NativeMethods.SteamAPI_RegisterCallback(_pCCallbackBase.AddrOfPinnedObject(), CallbackIdentities.GetCallbackIdentity(typeof(T)));
}
