Implement #243, separate core/client (PCH support dropped for now)

client/Daemon.h

@@ -0,0 +1,73 @@
+#pragma once
+#include <string>
+
+#ifdef _WIN32
+#define Daemon i2p::util::DaemonWin32::Instance()
+#else
+#define Daemon i2p::util::DaemonLinux::Instance()
+#endif
+
+namespace i2p
+{
+    namespace util
+    {
+        class Daemon_Singleton_Private;
+        class Daemon_Singleton
+        {
+        public:
+            virtual bool init(int argc, char* argv[]);
+            virtual bool start();
+            virtual bool stop();
+
+            int isLogging;
+            int isDaemon;
+            
+            int running;
+
+        protected:
+            Daemon_Singleton();
+            virtual ~Daemon_Singleton();
+
+            bool IsService () const;                
+
+            // d-pointer for httpServer, httpProxy, etc.
+            class Daemon_Singleton_Private;
+            Daemon_Singleton_Private &d;
+        };
+
+#ifdef _WIN32
+        class DaemonWin32 : public Daemon_Singleton
+        {
+        public:
+            static DaemonWin32& Instance()
+            {
+                static DaemonWin32 instance;
+                return instance;
+            }
+
+            virtual bool init(int argc, char* argv[]);
+            virtual bool start();
+            virtual bool stop();
+        };
+#else
+        class DaemonLinux : public Daemon_Singleton
+        {
+        public:
+            DaemonLinux() = default;
+
+            static DaemonLinux& Instance()
+            {
+                static DaemonLinux instance;
+                return instance;
+            }
+
+            virtual bool start();
+            virtual bool stop();
+         private:
+                std::string pidfile;
+                int pidFilehandle;
+
+        };
+#endif
+    }
+}