移动 g_user_metric_label_count位置，避免循环引用 (#800)

include/ylt/metric/dynamic_metric.hpp

@@ -2,12 +2,15 @@
 #include <thread>
 
 #include "metric.hpp"
+#include "thread_local_value.hpp"
 #include "ylt/util/map_sharded.hpp"
 
 namespace ylt::metric {
 
 class dynamic_metric : public metric_t {
  public:
+  static inline auto g_user_metric_label_count =
+      new thread_local_value<int64_t>(std::thread::hardware_concurrency());
   using metric_t::metric_t;
 };
 
@@ -124,4 +127,4 @@ class dynamic_metric_impl : public dynamic_metric {
                       my_hash<137>>
       map_{std::min<unsigned>(128u, std::thread::hardware_concurrency())};
 };
-}  // namespace ylt::metric
+}  // namespace ylt::metric

include/ylt/metric/metric.hpp

@@ -13,7 +13,6 @@
 #include "async_simple/coro/Lazy.h"
 #include "async_simple/coro/SyncAwait.h"
 #include "cinatra/cinatra_log_wrapper.hpp"
-#include "thread_local_value.hpp"
 #if __has_include("ylt/coro_io/coro_io.hpp")
 #include "ylt/coro_io/coro_io.hpp"
 #else
@@ -52,8 +51,7 @@ struct metric_filter_options {
 class metric_t {
  public:
   static inline std::atomic<int64_t> g_user_metric_count = 0;
-  static inline auto g_user_metric_label_count =
-      new thread_local_value<int64_t>(std::thread::hardware_concurrency());
+
   metric_t() = default;
   metric_t(MetricType type, std::string name, std::string help)
       : type_(type),

include/ylt/metric/system_metric.hpp

@@ -362,7 +362,8 @@ inline void stat_metric() {
   static auto user_metric_label_count =
       system_metric_manager::instance().get_metric_static<gauge_t>(
           "ylt_user_metric_labels");
-  user_metric_label_count->update(metric_t::g_user_metric_label_count->value());
+  user_metric_label_count->update(
+      dynamic_metric::g_user_metric_label_count->value());
 }
 
 inline void ylt_stat() {
@@ -451,4 +452,4 @@ inline bool start_system_metric() {
   return true;
 }
 }  // namespace ylt::metric
-#endif
+#endif