//===-- SystemLifetimeManager.cpp -----------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

#include "lldb/Initialization/SystemLifetimeManager.h"

#include "lldb/Initialization/SystemInitializer.h"

#include <utility>

using namespace lldb_private;

SystemLifetimeManager::SystemLifetimeManager() : m_mutex() {}

SystemLifetimeManager::~SystemLifetimeManager() {
  assert(m_initialized != 0 &&
         "SystemLifetimeManager destroyed without calling Initialize!");
  assert(m_initialized == m_terminated &&
         "SystemLifetimeManager destroyed without calling Terminate!");
}

llvm::Error SystemLifetimeManager::Initialize(
    std::unique_ptr<SystemInitializer> initializer) {
  std::lock_guard<std::recursive_mutex> guard(m_mutex);
  if (!m_initializer) {
    m_initialized++;
    m_initializer = std::move(initializer);

    if (auto e = m_initializer->Initialize())
      return e;
  }

  return llvm::Error::success();
}

void SystemLifetimeManager::Terminate() {
  std::lock_guard<std::recursive_mutex> guard(m_mutex);

  if (m_initializer) {
    m_initializer->Terminate();
    m_initializer.reset();
    m_terminated++;
  }
}