contrib/llvm-project/lldb/source/Initialization/SystemLifetimeManager.cpp

   1 //===-- SystemLifetimeManager.cpp ------------------------------*- C++ -*-===//
   2 //
   3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
   4 // See https://llvm.org/LICENSE.txt for license information.
   5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
   6 //
   7 //===----------------------------------------------------------------------===//
   8
   9 #include "lldb/Initialization/SystemLifetimeManager.h"
  10
  11 #include "lldb/Core/Debugger.h"
  12 #include "lldb/Initialization/SystemInitializer.h"
  13
  14 #include <utility>
  15
  16 using namespace lldb_private;
  17
  18 SystemLifetimeManager::SystemLifetimeManager()
  19     : m_mutex(), m_initialized(false) {}
  20
  21 SystemLifetimeManager::~SystemLifetimeManager() {
  22   assert(!m_initialized &&
  23          "SystemLifetimeManager destroyed without calling Terminate!");
  24 }
  25
  26 llvm::Error SystemLifetimeManager::Initialize(
  27     std::unique_ptr<SystemInitializer> initializer,
  28     LoadPluginCallbackType plugin_callback) {
  29   std::lock_guard<std::recursive_mutex> guard(m_mutex);
  30   if (!m_initialized) {
  31     assert(!m_initializer && "Attempting to call "
  32                              "SystemLifetimeManager::Initialize() when it is "
  33                              "already initialized");
  34     m_initialized = true;
  35     m_initializer = std::move(initializer);
  36
  37     if (auto e = m_initializer->Initialize())
  38       return e;
  39
  40     Debugger::Initialize(plugin_callback);
  41   }
  42
  43   return llvm::Error::success();
  44 }
  45
  46 void SystemLifetimeManager::Terminate() {
  47   std::lock_guard<std::recursive_mutex> guard(m_mutex);
  48
  49   if (m_initialized) {
  50     Debugger::Terminate();
  51     m_initializer->Terminate();
  52
  53     m_initializer.reset();
  54     m_initialized = false;
  55   }
  56 }