int UnloadModule(ILua lua)
{
try
{
string module_name = lua.GetString(1);
if (String.IsNullOrEmpty(module_name))
{
throw new Exception("Module name is empty or null");
}
if (!module_contexts.ContainsKey(module_name))
{
throw new Exception($"There is no loaded module with name { module_name }");
}
lua.PrintToConsole($"Unloading module { module_name } ...");
WeakReference <GmodNetModuleAssemblyLoadContext> context_weak_reference = UnloadHelper(module_name);
for (int i = 0; context_weak_reference.TryGetTarget(out _); i++)
{
lua.PushSpecial(SPECIAL_TABLES.SPECIAL_GLOB);
lua.GetField(-1, "collectgarbage");
lua.MCall(0, 0);
lua.Pop(1);
GC.Collect();
GC.WaitForPendingFinalizers();
if (i >= 300)
{
throw new Exception($"Module {module_name} can't be unloaded: there are remaining references or background threads still executing. " +
$"Module resources can't be freed. Memory leak could occur. Game restart may be required.");
}
}
lua.PrintToConsole($"Module {module_name} was unloaded.");
lua.PushBool(true);
return(1);
}
catch (Exception e)
{
lua.PrintToConsole("Unable to unload module: exception was thrown");
lua.PrintToConsole(e.ToString());
lua.PushBool(false);
return(1);
}
}
internal void OnNativeUnload(ILua lua)
{
try
{
List <string> module_names = new List <string>();
foreach (var p in module_contexts)
{
module_names.Add(p.Key);
}
foreach (string name in module_names)
{
try
{
WeakReference <GmodNetModuleAssemblyLoadContext> weak_reference = UnloadHelper(name);
for (int i = 0; weak_reference.TryGetTarget(out _); i++)
{
lua.PushSpecial(SPECIAL_TABLES.SPECIAL_GLOB);
lua.GetField(-1, "collectgarbage");
lua.MCall(0, 0);
lua.Pop(1);
GC.Collect();
GC.WaitForPendingFinalizers();
if (i >= 300)
{
throw new Exception($"Module {name} can't be unloaded: there are remaining references or background threads still executing. " +
$"Module resources can't be freed. Memory leak could occur. Game restart may be required.");
}
}
}
catch (Exception e)
{
lua.PrintToConsole($"Exception was thrown while unloading .NET module {name}");
lua.PrintToConsole(e.ToString());
}
}
}
catch (Exception e)
{
lua.PrintToConsole("Critiacal error occured on .NET modules unload");
lua.PrintToConsole(e.ToString());
}
}
int LoadModule(ILua lua)
{
try
{
string module_name = lua.GetString(1);
lua.Pop(lua.Top());
if (String.IsNullOrEmpty(module_name))
{
throw new Exception("Module name is null or empty");
}
if (module_contexts.ContainsKey(module_name))
{
throw new Exception($"Module with name {module_name} is already loaded");
}
GmodNetModuleAssemblyLoadContext module_context = new GmodNetModuleAssemblyLoadContext(module_name);
Assembly module_assembly = module_context.LoadFromAssemblyPath(Path.GetFullPath("garrysmod/lua/bin/Modules/" + module_name + "/" + module_name + ".dll"));
Type[] module_types = module_assembly.GetTypes().Where(t => typeof(IModule).IsAssignableFrom(t)).ToArray();
List <IModule> modules = new List <IModule>();
List <GCHandle> gc_handles = new List <GCHandle>();
foreach (Type t in module_types)
{
IModule current_module = (IModule)Activator.CreateInstance(t);
modules.Add(current_module);
gc_handles.Add(GCHandle.Alloc(current_module));
}
if (modules.Count == 0)
{
throw new Exception($"Module {module_name} does not contain any implementations of the IModule interface.");
}
lua.PrintToConsole("Loading modules from " + module_name + ".");
lua.PrintToConsole("Number of the IModule interface implementations: " + modules.Count);
foreach (IModule m in modules)
{
lua.PrintToConsole("Loading class-module " + m.ModuleName + " version " + m.ModuleVersion + "...");
m.Load(lua, isServerSide, module_context);
lua.PrintToConsole("Class-module " + m.ModuleName + " was loaded.");
}
module_contexts.Add(module_name, Tuple.Create(module_context, gc_handles));
lua.PushBool(true);
return(1);
}
catch (Exception e)
{
lua.PrintToConsole("Unable to load module: exception was thrown");
lua.PrintToConsole(e.ToString());
lua.PushBool(false);
return(1);
}
}
