Added registry::set_instance() and shared_instance()

include/spdlog/details/registry-inl.h

@@ -26,10 +26,27 @@
 #include <memory>
 #include <string>
 #include <unordered_map>
+#include <mutex>
+
 
 namespace spdlog {
 namespace details {
 
+
+SPDLOG_INLINE static std::shared_ptr<registry> s_instance = std::make_shared<registry>();
+
+SPDLOG_INLINE registry &registry::instance() {
+    return *s_instance;
+}
+
+SPDLOG_INLINE std::shared_ptr<registry> registry::shared_instance() {
+    return s_instance;
+}
+
+SPDLOG_INLINE void registry::set_instance(std::shared_ptr<registry> instance) {
+    s_instance = instance;
+}
+
 SPDLOG_INLINE registry::registry()
     : formatter_(new pattern_formatter()) {
 #ifndef SPDLOG_DISABLE_DEFAULT_LOGGER
@@ -233,10 +250,6 @@ SPDLOG_INLINE void registry::set_levels(log_levels levels, level::level_enum *gl
     }
 }
 
-SPDLOG_INLINE registry &registry::instance() {
-    static registry s_instance;
-    return s_instance;
-}
 
 SPDLOG_INLINE void registry::apply_logger_env_levels(std::shared_ptr<logger> new_logger) {
     std::lock_guard<std::mutex> lock(logger_map_mutex_);

include/spdlog/details/registry.h

@@ -26,6 +26,9 @@ class thread_pool;
 
 class SPDLOG_API registry {
 public:
+    registry();
+    ~registry();
+
     using log_levels = std::unordered_map<std::string, level::level_enum>;
     registry(const registry &) = delete;
     registry &operator=(const registry &) = delete;
@@ -95,16 +98,15 @@ public:
     // set levels for all existing/future loggers. global_level can be null if should not set.
     void set_levels(log_levels levels, level::level_enum *global_level);
 
+    static void set_instance(std::shared_ptr<registry> instance);
     static registry &instance();
+    static std::shared_ptr<registry> shared_instance();
 
     void apply_logger_env_levels(std::shared_ptr<logger> new_logger);
 
     std::mutex& console_mutex();
 
 private:
-    registry();
-    ~registry();
-
     void throw_if_exists_(const std::string &logger_name);
     void register_logger_(std::shared_ptr<logger> new_logger);
     bool set_level_from_cfg_(logger *logger);