private static IntPtr GetHandle(NativeAssemblyResolver resolver, params string[] names)
{
if (names == null || names.Length == 0)
{
throw new ArgumentNullException(nameof(names));
}
IntPtr value = IntPtr.Zero;
foreach (string name in names)
{
if (Path.IsPathRooted(name))
{
switch (PlatformHelper.CurrentPlatform)
{
case PlatformHelper.Platform.Windows:
value = Kernel32.LoadLibrary(name);
break;
case PlatformHelper.Platform.Linux:
case PlatformHelper.Platform.MacOS:
case PlatformHelper.Platform.FreeBSD:
value = Libdl.dlopen(name, 0x002);
break;
default:
break;
}
}
else
{
foreach (string loadTarget in resolver.EnumerateLoadTargets(name))
{
if (!Path.IsPathRooted(loadTarget) || File.Exists(loadTarget))
{
IntPtr v = IntPtr.Zero;
switch (PlatformHelper.CurrentPlatform)
{
case PlatformHelper.Platform.Windows:
v = Kernel32.LoadLibrary(loadTarget);
break;
case PlatformHelper.Platform.Linux:
case PlatformHelper.Platform.MacOS:
case PlatformHelper.Platform.FreeBSD:
v = Libdl.dlopen(loadTarget, 0x002);
break;
default:
break;
}
if (v != IntPtr.Zero)
{
value = v;
}
}
}
}
if (value != IntPtr.Zero)
{
break;
}
}
if (value == IntPtr.Zero)
{
throw new FileNotFoundException($"Could not load a library with the specified name(s): [ {string.Join(", ", names)} ]");
}
return(value);
}
/// <summary>
/// Initializes a new instance of the <see cref="NativeAssembly"/> class
/// with the specified <see cref="NativeAssemblyResolver"/>.
/// </summary>
/// <param name="names">An ordered list of assembly names to attempt to load.</param>
/// <param name="resolver">The resolver used to identify possible load targets for the assembly.</param>
public NativeAssembly(NativeAssemblyResolver resolver, params string[] names) : base(new SafeAssemblyHandle(GetHandle(resolver, names)))
{
}
