Merge pull request #90 from divaykin/sink-flush

explicit flush()

include/spdlog/details/file_helper.h

@@ -87,6 +87,10 @@ public:
 
     }
 
+    void flush() {
+        std::fflush(_fd);
+    }
+
     void close()
     {
         if (_fd)

include/spdlog/details/logger_impl.h

@@ -312,4 +312,8 @@ inline void spdlog::logger::_set_formatter(formatter_ptr msg_formatter)
     _formatter = msg_formatter;
 }
 
-
+inline void spdlog::logger::flush() {
+    for (auto& sink : _sinks) {
+        sink->flush();
+    }
+}

include/spdlog/logger.h

@@ -107,6 +107,7 @@ public:
     void set_pattern(const std::string&);
     void set_formatter(formatter_ptr);
 
+    void flush();
 
 protected:
     virtual void _log_msg(details::log_msg&);

include/spdlog/sinks/base_sink.h

@@ -58,7 +58,6 @@ public:
         _sink_it(msg);
     }
 
-
 protected:
     virtual void _sink_it(const details::log_msg& msg) = 0;
     Mutex _mutex;

include/spdlog/sinks/file_sinks.h

@@ -80,6 +80,10 @@ public:
         _file_helper.open(calc_filename(_base_filename, 0, _extension));
     }
 
+    virtual void flush() override {
+        _file_helper.flush();
+    }
+
 protected:
     void _sink_it(const details::log_msg& msg) override
     {
@@ -167,6 +171,10 @@ public:
         _file_helper.open(calc_filename(_base_filename, _extension));
     }
 
+    virtual void flush() override {
+        _file_helper.flush();
+    }
+
 protected:
     void _sink_it(const details::log_msg& msg) override
     {

include/spdlog/sinks/null_sink.h

@@ -40,6 +40,9 @@ protected:
     void _sink_it(const details::log_msg&) override
     {}
 
+    void flush() override
+    {}
+
 };
 typedef null_sink<details::null_mutex> null_sink_st;
 typedef null_sink<std::mutex> null_sink_mt;

include/spdlog/sinks/ostream_sink.h

@@ -51,6 +51,11 @@ protected:
         if (_force_flush)
             _ostream.flush();
     }
+
+    virtual void flush() override {
+        _ostream.flush();
+    }
+
     std::ostream& _ostream;
     bool _force_flush;
 };

include/spdlog/sinks/sink.h

@@ -35,6 +35,7 @@ class sink
 public:
     virtual ~sink() {}
     virtual void log(const details::log_msg& msg) = 0;
+    virtual void flush() = 0;
 };
 }
 }

include/spdlog/sinks/syslog_sink.h

@@ -78,6 +78,8 @@ public:
         ::syslog(syslog_prio_from_level(msg), "%s", msg.formatted.str().c_str());
     }
 
+    virtual void flush() override {
+    }
 
 
 private: