Add BCLog::Logger::m_category_log_levels data member and getter/setter

Co-authored-by: "klementtan <klementtan@gmail.com>"

src/logging.h

@@ -17,6 +17,7 @@
 #include <list>
 #include <mutex>
 #include <string>
+#include <unordered_map>
 #include <vector>
 
 static const bool DEFAULT_LOGTIMEMICROS = false;
@@ -92,6 +93,9 @@ namespace BCLog {
          */
         std::atomic_bool m_started_new_line{true};
 
+        //! Category-specific log level. Overrides `m_log_level`.
+        std::unordered_map<LogFlags, Level> m_category_log_levels GUARDED_BY(m_cs);
+
         //! If there is no category-specific log level, all logs with a severity
         //! level lower than `m_log_level` will be ignored.
         std::atomic<Level> m_log_level{DEFAULT_LOG_LEVEL};
@@ -148,6 +152,17 @@ namespace BCLog {
 
         void ShrinkDebugFile();
 
+        std::unordered_map<LogFlags, Level> CategoryLevels() const
+        {
+            StdLockGuard scoped_lock(m_cs);
+            return m_category_log_levels;
+        }
+        void SetCategoryLogLevel(const std::unordered_map<LogFlags, Level>& levels)
+        {
+            StdLockGuard scoped_lock(m_cs);
+            m_category_log_levels = levels;
+        }
+
         Level LogLevel() const { return m_log_level.load(); }
         void SetLogLevel(Level level) { m_log_level = level; }