/// <summary>
/// Loads the given library
/// </summary>
/// <param name="libraryName">Name of the library to load</param>
public Library(string libraryName)
{
_handle = NativeMethods.LoadLibrary(libraryName);
if (_handle == IntPtr.Zero)
{
throw new ArgumentException($"Cannot load library '{libraryName}'. {InteropUtility.GetLastErrorCodeAndMessage()}");
}
Name = libraryName;
}
/// <summary>
/// Gets a delegate for an unmanaged function of the given name
/// </summary>
/// <typeparam name="TDelegate">The type of delegate to which to convert the function pointer</typeparam>
/// <param name="functionName">The name of the function</param>
public TDelegate GetDelegate <TDelegate>(string functionName)
{
if (!TryGetFunctionPointer(functionName, out IntPtr functionPointer))
{
throw new ArgumentException($"Cannot load function '{functionName}' from library '{Name}'. {InteropUtility.GetLastErrorCodeAndMessage()}");
}
TDelegate result = Marshal.GetDelegateForFunctionPointer <TDelegate>(functionPointer);
return(result);
}
/// <summary>
/// Frees the unmanaged library represented by this object
/// </summary>
public void Dispose()
{
InteropUtility.ClearPointer(ref _handle, NativeMethods.FreeLibrary);
Name = null;
}
/// <summary>
/// Frees the unmanaged memory via <see cref="Marshal.FreeHGlobal"/>
/// </summary>
public virtual void Dispose()
{
InteropUtility.ClearPointer(ref _pointer, Marshal.FreeHGlobal);
}
