add single logger method and log_msg constructor and tests/test_time_point.cpp

include/spdlog/details/log_msg-inl.h

@@ -13,10 +13,10 @@ namespace spdlog {
 namespace details {
 
 SPDLOG_INLINE log_msg::log_msg(
-    spdlog::source_loc loc, string_view_t a_logger_name, spdlog::level::level_enum lvl, spdlog::string_view_t msg)
+    spdlog::log_clock::time_point log_time, spdlog::source_loc loc, string_view_t a_logger_name, spdlog::level::level_enum lvl, spdlog::string_view_t msg)
     : logger_name(a_logger_name)
     , level(lvl)
-    , time(os::now())
+    , time(log_time)
 #ifndef SPDLOG_NO_THREAD_ID
     , thread_id(os::thread_id())
 #endif
@@ -24,8 +24,13 @@ SPDLOG_INLINE log_msg::log_msg(
     , payload(msg)
 {}
 
+SPDLOG_INLINE log_msg::log_msg(
+    spdlog::source_loc loc, string_view_t a_logger_name, spdlog::level::level_enum lvl, spdlog::string_view_t msg)
+    : log_msg(os::now(), loc, a_logger_name, lvl, msg)
+{}
+
 SPDLOG_INLINE log_msg::log_msg(string_view_t a_logger_name, spdlog::level::level_enum lvl, spdlog::string_view_t msg)
-    : log_msg(source_loc{}, a_logger_name, lvl, msg)
+    : log_msg(os::now(), source_loc{}, a_logger_name, lvl, msg)
 {}
 
 } // namespace details

include/spdlog/details/log_msg.h

@@ -11,6 +11,7 @@ namespace details {
 struct SPDLOG_API log_msg
 {
     log_msg() = default;
+    log_msg(log_clock::time_point log_time, source_loc loc, string_view_t logger_name, level::level_enum lvl, string_view_t msg);
     log_msg(source_loc loc, string_view_t logger_name, level::level_enum lvl, string_view_t msg);
     log_msg(string_view_t logger_name, level::level_enum lvl, string_view_t msg);
     log_msg(const log_msg &other) = default;

include/spdlog/logger.h

@@ -147,6 +147,19 @@ public:
         log(loc, lvl, string_view_t{msg});
     }
 
+    void log(log_clock::time_point &log_time, source_loc loc, level::level_enum lvl, string_view_t msg)
+    {
+        bool log_enabled = should_log(lvl);
+        bool traceback_enabled = tracer_.enabled();
+        if (!log_enabled && !traceback_enabled)
+        {
+            return;
+        }
+
+        details::log_msg log_msg(log_time, loc, name_, lvl, msg);
+        log_it_(log_msg, log_enabled, traceback_enabled);
+    }
+
     void log(source_loc loc, level::level_enum lvl, string_view_t msg)
     {
         bool log_enabled = should_log(lvl);

tests/CMakeLists.txt

@@ -32,7 +32,8 @@ set(SPDLOG_UTESTS_SOURCES
   	test_stdout_api.cpp
 	test_backtrace.cpp
 	test_create_dir.cpp
-		test_cfg.cpp)
+	test_cfg.cpp
+	test_time_point.cpp)
 
 if(NOT SPDLOG_NO_EXCEPTIONS)
 	list(APPEND SPDLOG_UTESTS_SOURCES test_errors.cpp)

tests/test_time_point.cpp

+#include "includes.h"
+#include "test_sink.h"
+#include "spdlog/async.h"
+
+TEST_CASE("time_point1", "[time_point log_msg]")
+{
+	std::shared_ptr<spdlog::sinks::test_sink_st> test_sink(new spdlog::sinks::test_sink_st);
+	spdlog::logger logger("test-time_point", test_sink);
+
+	spdlog::source_loc source{};
+	std::chrono::system_clock::time_point tp{std::chrono::system_clock::now()};
+    test_sink->set_pattern("%T.%F"); // interested in the time_point
+
+	// all the following should have the same time
+	test_sink->set_delay(std::chrono::milliseconds(10));
+    for (int i = 0; i < 5; i++) {
+		spdlog::details::log_msg msg{tp,source,"test_logger", spdlog::level::info, "message"};
+        test_sink->log(msg);
+	}
+	
+	logger.log(tp,source,spdlog::level::info,"formatted message");
+	logger.log(tp,source,spdlog::level::info,"formatted message");
+	logger.log(tp,source,spdlog::level::info,"formatted message");
+	logger.log(tp,source,spdlog::level::info,"formatted message");
+	logger.log(source,spdlog::level::info,"formatted message"); // last line has different time_point
+
+	// now the real test... that the times are the same.
+	std::vector<std::string> lines = test_sink->lines();
+    REQUIRE(lines[0] == lines[1]);
+    REQUIRE(lines[2] == lines[3]);
+    REQUIRE(lines[4] == lines[5]);
+    REQUIRE(lines[6] == lines[7]);
+    REQUIRE(lines[8] != lines[9]);
+    spdlog::drop_all();
+}