[Lldb-commits] [lldb] [lldb][progress] Add progress manager class (PR #81319)

[Greg Clayton via lldb-commits]

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@@ -66,3 +66,47 @@ void Progress::ReportProgress() {
                              m_debugger_id);
   }
 }
+
+void ProgressManager::Initialize() {
+  lldbassert(!InstanceImpl() && "A progress report manager already exists.");
+  InstanceImpl().emplace();
+}
+
+void ProgressManager::Terminate() {
+  lldbassert(InstanceImpl() &&
+             "A progress report manager has already been terminated.");
+  InstanceImpl().reset();
+}
+
+std::optional<ProgressManager> &ProgressManager::InstanceImpl() {
+  static std::optional<ProgressManager> g_progress_manager;
+  return g_progress_manager;
+}
+
+ProgressManager::ProgressManager() : m_progress_map() {}
+
+ProgressManager::~ProgressManager() {}
+
+ProgressManager &ProgressManager::Instance() { return *InstanceImpl(); }
----------------
clayborg wrote:

Another reason for using the `std::once` is if no one tries to listen to the eBroadcastBitProgressCategory, then nothing will need to be created. If not we are always making an instance. Granted this object isn't very expensive to create, but it is extra work that might not be needed.

https://github.com/llvm/llvm-project/pull/81319