SystemLifetimeManager.cpp

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//===-- 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++;
  }
}