Fixed thread id bug in async mode by passing thread id in log_msg struct

include/spdlog/details/async_log_helper.h

@@ -60,6 +60,7 @@ class async_log_helper
         level::level_enum level;
         log_clock::time_point time;
         std::string txt;
+        std::thread::id thread_id;
 
         async_msg() = default;
         ~async_msg() = default;
@@ -99,6 +100,7 @@ async_msg(async_msg&& other) SPDLOG_NOEXCEPT:
             msg.logger_name = logger_name;
             msg.level = level;
             msg.time = time;
+            msg.thread_id = thread_id;
             msg.raw << txt;
         }
     };

include/spdlog/details/line_logger.h

@@ -26,7 +26,7 @@
 #include <type_traits>
 #include "../common.h"
 #include "../logger.h"
-
+#include <pthread.h>
 
 // Line logger class - aggregates operator<< calls to fast ostream
 // and logs upon destruction
@@ -65,6 +65,7 @@ public:
         {
             _log_msg.logger_name = _callback_logger->name();
             _log_msg.time = os::now();
+            _log_msg.thread_id = std::this_thread::get_id();
             _callback_logger->_log_msg(_log_msg);
         }
     }

include/spdlog/details/log_msg.h

@@ -24,6 +24,7 @@
 
 #pragma once
 
+#include <thread>
 #include "../common.h"
 #include "./format.h"
 
@@ -38,14 +39,16 @@ struct log_msg
         logger_name(),
         level(l),
         time(),
+        thread_id(),
         raw(),
         formatted() {}
 
 
     log_msg(const log_msg& other) :
         logger_name(other.logger_name),
-        level(other.level),
-        time(other.time)
+        level(other.level),        
+        time(other.time),
+        thread_id(other.thread_id)
     {
         if (other.raw.size())
             raw << fmt::BasicStringRef<char>(other.raw.data(), other.raw.size());
@@ -57,6 +60,7 @@ struct log_msg
         logger_name(std::move(other.logger_name)),
         level(other.level),
         time(std::move(other.time)),
+        thread_id(other.thread_id),
         raw(std::move(other.raw)),
         formatted(std::move(other.formatted))
     {
@@ -71,6 +75,7 @@ struct log_msg
         logger_name = std::move(other.logger_name);
         level = other.level;
         time = std::move(other.time);
+        thread_id = other.thread_id;
         raw = std::move(other.raw);
         formatted = std::move(other.formatted);
         other.clear();
@@ -79,7 +84,7 @@ struct log_msg
 
     void clear()
     {
-        level = level::off;
+        level = level::off;        
         raw.clear();
         formatted.clear();
     }
@@ -87,6 +92,7 @@ struct log_msg
     std::string logger_name;
     level::level_enum level;
     log_clock::time_point time;
+    std::thread::id thread_id;
     fmt::MemoryWriter raw;
     fmt::MemoryWriter formatted;
 };

include/spdlog/details/pattern_formatter_impl.h

@@ -354,7 +354,7 @@ class t_formatter :public flag_formatter
 {
     void format(details::log_msg& msg, const std::tm&) override
     {
-        msg.formatted << std::hash<std::thread::id>()(std::this_thread::get_id());
+        msg.formatted << std::hash<std::thread::id>()(msg.thread_id);
     }
 };