fix: signal handling (#1375)

* fix: signal handling

* fix: flush WorldServer logger before main loop

* fix: consolidate signal code

dCommon/CMakeLists.txt

@@ -5,6 +5,7 @@ set(DCOMMON_SOURCES
 		"dConfig.cpp"
 		"Diagnostics.cpp"
 		"Logger.cpp"
+		"Game.cpp"
 		"GeneralUtils.cpp"
 		"LDFFormat.cpp"
 		"MD5.cpp"

dCommon/Game.cpp

@@ -0,0 +1,7 @@
+#include "Game.h"
+
+namespace Game {
+	void OnSignal(int signal) {
+		lastSignal = signal;
+	}
+}

dCommon/Game.h

@@ -2,6 +2,7 @@
 
 #include <string>
 #include <random>
+#include <csignal>
 
 class dServer;
 class Logger;
@@ -16,6 +17,7 @@ class dZoneManager;
 class PlayerContainer;
 
 namespace Game {
+	using signal_t = volatile std::sig_atomic_t;
 	extern Logger* logger;
 	extern dServer* server;
 	extern InstanceManager* im;
@@ -25,9 +27,14 @@ namespace Game {
 	extern RakPeerInterface* chatServer;
 	extern AssetManager* assetManager;
 	extern SystemAddress chatSysAddr;
-	extern bool shouldShutdown;
+	extern signal_t lastSignal;
 	extern EntityManager* entityManager;
 	extern dZoneManager* zoneManager;
 	extern PlayerContainer playerContainer;
 	extern std::string projectVersion;
+
+	inline bool ShouldShutdown() {
+		return lastSignal != 0;
+	}
+	void OnSignal(int signal);
 }

dCommon/Logger.cpp

@@ -6,6 +6,8 @@
 #include <stdarg.h>
 
 Writer::~Writer() {
+	// Flush before we close
+	Flush();
 	// Dont try to close stdcout...
 	if (!m_Outfile || m_IsConsoleWriter) return;