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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/windows_services/service_program/process_wrl_module.h"
#include <wrl/module.h>
#include <utility>
#include "base/no_destructor.h"
namespace {
// A process-wide singleton by necessity, as WRL::Module requires a fixed
// object/method pair at construction.
class ModuleReleaseHelper {
public:
ModuleReleaseHelper(const ModuleReleaseHelper&) = delete;
ModuleReleaseHelper& operator=(const ModuleReleaseHelper&) = delete;
static ModuleReleaseHelper& GetInstance() {
static base::NoDestructor<ModuleReleaseHelper> instance;
return *instance;
}
// Sets the callback to be run when the last reference to the module is
// released.
void SetModuleReleasedCallback(base::OnceClosure callback) {
callback_ = std::move(callback);
}
// A method invoked by the WRL::Module's release notifier. Runs the held
// callback, if any.
void OnModuleReleased() {
if (callback_) {
std::move(callback_).Run();
}
}
private:
friend class base::NoDestructor<ModuleReleaseHelper>;
ModuleReleaseHelper() = default;
base::OnceClosure callback_;
};
} // namespace
void CreateWrlModule() {
Microsoft::WRL::Module<Microsoft::WRL::OutOfProc>::Create(
&ModuleReleaseHelper::GetInstance(),
&ModuleReleaseHelper::OnModuleReleased);
}
void SetModuleReleasedCallback(base::OnceClosure callback) {
ModuleReleaseHelper::GetInstance().SetModuleReleasedCallback(
std::move(callback));
}
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