[Lldb-commits] [lldb] [LLDB][Data Formatters] Calculate average and total time for summary providers within lldb (PR #102708)

[Jonas Devlieghere via lldb-commits]

================
@@ -174,6 +177,82 @@ struct StatisticsOptions {
   std::optional<bool> m_include_transcript;
 };
 
+/// A class that represents statistics about a TypeSummaryProviders invocations
+class SummaryStatistics {
+public:
+  explicit SummaryStatistics(std::string name,
+                             std::string impl_type)
+      : m_total_time(), m_impl_type(impl_type), m_name(name),
+        m_summary_count(0) {}
+
+  std::string GetName() const { return m_name; };
+  double GetTotalTime() const { return m_total_time.get().count(); }
+
+  uint64_t GetSummaryCount() const {
+    return m_summary_count.load(std::memory_order_relaxed);
+  }
+
+  StatsDuration &GetDurationReference() { return m_total_time; }
+
+  std::string GetSummaryKindName() const { return m_impl_type; }
+
+  llvm::json::Value ToJSON() const;
+
+  // Basic RAII class to increment the summary count when the call is complete.
+  // In the future this can be extended to collect information about the
+  // elapsed time for a single request.
+  class SummaryInvocation {
+  public:
+    SummaryInvocation(SummaryStatistics &summary)
+        : m_summary(summary), m_elapsed_time(summary.GetDurationReference()) {}
+    ~SummaryInvocation() { m_summary.OnInvoked(); }
+
+    // Delete the copy constructor and assignment operator to prevent
+    // accidental double counting.
+    SummaryInvocation(const SummaryInvocation &) = delete;
+    SummaryInvocation &operator=(const SummaryInvocation &) = delete;
----------------
JDevlieghere wrote:

```suggestion
    /// Delete the copy constructor and assignment operator to prevent
    /// accidental double counting.
    /// @{
    SummaryInvocation(const SummaryInvocation &) = delete;
    SummaryInvocation &operator=(const SummaryInvocation &) = delete;
    /// @}
```

https://github.com/llvm/llvm-project/pull/102708