X-Git-Url: http://xvm.mit.edu/gitweb/invirt/third/libt4.git/blobdiff_plain/130f2d53438eb6193accb445aca52fa8e2fe4158..4b9798f44ae94deabf87dd534337b55259272950:/rpc/rpc.h

diff --git a/rpc/rpc.h b/rpc/rpc.h
index f7245ad..245f277 100644
--- a/rpc/rpc.h
+++ b/rpc/rpc.h
@@ -16,15 +16,21 @@
 #endif
 
 class rpc_const {
-	public:
-		static const unsigned int bind = 1;   // handler number reserved for bind
-		static const int timeout_failure = -1;
-		static const int unmarshal_args_failure = -2;
-		static const int unmarshal_reply_failure = -3;
-		static const int atmostonce_failure = -4;
-		static const int oldsrv_failure = -5;
-		static const int bind_failure = -6;
-		static const int cancel_failure = -7;
+    public:
+        static const unsigned int bind = 1;   // handler number reserved for bind
+        static const int timeout_failure = -1;
+        static const int unmarshal_args_failure = -2;
+        static const int unmarshal_reply_failure = -3;
+        static const int atmostonce_failure = -4;
+        static const int oldsrv_failure = -5;
+        static const int bind_failure = -6;
+        static const int cancel_failure = -7;
+};
+
+struct ReturnOnFailure {
+    static inline int unmarshall_args_failure() {
+        return rpc_const::unmarshal_args_failure;
+    }
 };
 
 // rpc client endpoint.
@@ -32,44 +38,44 @@ class rpc_const {
 // threaded: multiple threads can be sending RPCs,
 class rpcc : public chanmgr {
 
-	private:
+    private:
 
-		//manages per rpc info
-		struct caller {
-			caller(unsigned int xxid, unmarshall *un);
-			~caller();
+        //manages per rpc info
+        struct caller {
+            caller(unsigned int xxid, unmarshall *un);
+            ~caller();
 
-			unsigned int xid;
-			unmarshall *un;
-			int intret;
-			bool done;
+            unsigned int xid;
+            unmarshall *un;
+            int intret;
+            bool done;
             std::mutex m;
             std::condition_variable c;
-		};
+        };
 
-		void get_refconn(connection **ch);
-		void update_xid_rep(unsigned int xid);
+        void get_refconn(connection **ch);
+        void update_xid_rep(unsigned int xid);
 
 
-		sockaddr_in dst_;
-		unsigned int clt_nonce_;
-		unsigned int srv_nonce_;
-		bool bind_done_;
-		unsigned int xid_;
-		int lossytest_;
-		bool retrans_;
-		bool reachable_;
+        sockaddr_in dst_;
+        unsigned int clt_nonce_;
+        unsigned int srv_nonce_;
+        bool bind_done_;
+        unsigned int xid_;
+        int lossytest_;
+        bool retrans_;
+        bool reachable_;
 
-		connection *chan_;
+        connection *chan_;
 
         std::mutex m_; // protect insert/delete to calls[]
-		std::mutex chan_m_;
+        std::mutex chan_m_;
 
-		bool destroy_wait_;
+        bool destroy_wait_;
         std::condition_variable destroy_wait_c_;
 
-		std::map<int, caller *> calls_;
-		std::list<unsigned int> xid_rep_window_;
+        std::map<int, caller *> calls_;
+        std::list<unsigned int> xid_rep_window_;
                 
                 struct request {
                     request() { clear(); }
@@ -80,42 +86,42 @@ class rpcc : public chanmgr {
                 };
                 struct request dup_req_;
                 int xid_rep_done_;
-	public:
+    public:
 
-		rpcc(sockaddr_in d, bool retrans=true);
-		~rpcc();
+        rpcc(sockaddr_in d, bool retrans=true);
+        ~rpcc();
 
-		struct TO {
-			int to;
-		};
-		static const TO to_max;
-		static const TO to_min;
-		static TO to(int x) { TO t; t.to = x; return t;}
+        struct TO {
+            int to;
+        };
+        static const TO to_max;
+        static const TO to_min;
+        static TO to(int x) { TO t; t.to = x; return t;}
 
-		unsigned int id() { return clt_nonce_; }
+        unsigned int id() { return clt_nonce_; }
 
-		int bind(TO to = to_max);
+        int bind(TO to = to_max);
 
-		void set_reachable(bool r) { reachable_ = r; }
+        void set_reachable(bool r) { reachable_ = r; }
 
-		void cancel();
+        void cancel();
                 
                 int islossy() { return lossytest_ > 0; }
 
-		int call1(unsigned int proc, 
-				marshall &req, unmarshall &rep, TO to);
+        int call1(unsigned int proc, 
+                marshall &req, unmarshall &rep, TO to);
 
-		bool got_pdu(connection *c, char *b, int sz);
+        bool got_pdu(connection *c, char *b, int sz);
 
 
-		template<class R>
-			int call_m(unsigned int proc, marshall &req, R & r, TO to);
+        template<class R>
+            int call_m(unsigned int proc, marshall &req, R & r, TO to);
 
-		template<class R, typename ...Args>
-			inline int call(unsigned int proc, R & r, const Args&... args);
+        template<class R, typename ...Args>
+            inline int call(unsigned int proc, R & r, const Args&... args);
 
-		template<class R, typename ...Args>
-			inline int call_timeout(unsigned int proc, TO to, R & r, const Args&... args);
+        template<class R, typename ...Args>
+            inline int call_timeout(unsigned int proc, TO to, R & r, const Args&... args);
 };
 
 template<class R> int 
@@ -144,382 +150,120 @@ rpcc::call(unsigned int proc, R & r, const Args&... args)
 template<class R, typename... Args> inline int
 rpcc::call_timeout(unsigned int proc, const rpcc::TO to, R & r, const Args&... args)
 {
-	marshall m{args...};
-	return call_m(proc, m, r, to);
+    marshall m{args...};
+    return call_m(proc, m, r, to);
 }
 
 bool operator<(const sockaddr_in &a, const sockaddr_in &b);
 
-class handler {
-	public:
-		handler() { }
-		virtual ~handler() { }
-		virtual int fn(unmarshall &, marshall &) = 0;
-};
-
-
 // rpc server endpoint.
 class rpcs : public chanmgr {
 
-	typedef enum {
-		NEW,  // new RPC, not a duplicate
-		INPROGRESS, // duplicate of an RPC we're still processing
-		DONE, // duplicate of an RPC we already replied to (have reply)
-		FORGOTTEN,  // duplicate of an old RPC whose reply we've forgotten
-	} rpcstate_t;
+    typedef enum {
+        NEW,  // new RPC, not a duplicate
+        INPROGRESS, // duplicate of an RPC we're still processing
+        DONE, // duplicate of an RPC we already replied to (have reply)
+        FORGOTTEN,  // duplicate of an old RPC whose reply we've forgotten
+    } rpcstate_t;
 
-	private:
+    private:
 
         // state about an in-progress or completed RPC, for at-most-once.
         // if cb_present is true, then the RPC is complete and a reply
         // has been sent; in that case buf points to a copy of the reply,
         // and sz holds the size of the reply.
-	struct reply_t {
-		reply_t (unsigned int _xid) {
-			xid = _xid;
-			cb_present = false;
-			buf = NULL;
-			sz = 0;
-		}
-		reply_t (unsigned int _xid, char *_buf, int _sz) {
-			xid = _xid;
-			cb_present = true;
-			buf = _buf;
-			sz = _sz;
-		}
-		unsigned int xid;
-		bool cb_present; // whether the reply buffer is valid
-		char *buf;      // the reply buffer
-		int sz;         // the size of reply buffer
-	};
-
-	int port_;
-	unsigned int nonce_;
-
-	// provide at most once semantics by maintaining a window of replies
-	// per client that that client hasn't acknowledged receiving yet.
+    struct reply_t {
+        reply_t (unsigned int _xid) {
+            xid = _xid;
+            cb_present = false;
+            buf = NULL;
+            sz = 0;
+        }
+        reply_t (unsigned int _xid, char *_buf, int _sz) {
+            xid = _xid;
+            cb_present = true;
+            buf = _buf;
+            sz = _sz;
+        }
+        unsigned int xid;
+        bool cb_present; // whether the reply buffer is valid
+        char *buf;      // the reply buffer
+        int sz;         // the size of reply buffer
+    };
+
+    int port_;
+    unsigned int nonce_;
+
+    // provide at most once semantics by maintaining a window of replies
+    // per client that that client hasn't acknowledged receiving yet.
         // indexed by client nonce.
-	std::map<unsigned int, std::list<reply_t> > reply_window_;
-
-	void free_reply_window(void);
-	void add_reply(unsigned int clt_nonce, unsigned int xid, char *b, int sz);
-
-	rpcstate_t checkduplicate_and_update(unsigned int clt_nonce, 
-			unsigned int xid, unsigned int rep_xid,
-			char **b, int *sz);
-
-	void updatestat(unsigned int proc);
-
-	// latest connection to the client
-	std::map<unsigned int, connection *> conns_;
-
-	// counting
-	const int counting_;
-	int curr_counts_;
-	std::map<int, int> counts_;
-
-	int lossytest_; 
-	bool reachable_;
-
-	// map proc # to function
-	std::map<int, handler *> procs_;
-
-	std::mutex procs_m_; // protect insert/delete to procs[]
-	std::mutex count_m_;  //protect modification of counts
-	std::mutex reply_window_m_; // protect reply window et al
-	std::mutex conss_m_; // protect conns_
-
-
-	protected:
-
-	struct djob_t {
-		djob_t (connection *c, char *b, int bsz):buf(b),sz(bsz),conn(c) {}
-		char *buf;
-		int sz;
-		connection *conn;
-	};
-	void dispatch(djob_t *);
-
-	// internal handler registration
-	void reg1(unsigned int proc, handler *);
-
-	ThrPool* dispatchpool_;
-	tcpsconn* listener_;
-
-	public:
-	rpcs(unsigned int port, int counts=0);
-	~rpcs();
-        inline int port() { return listener_->port(); }
-	//RPC handler for clients binding
-	int rpcbind(int a, int &r);
-
-	void set_reachable(bool r) { reachable_ = r; }
-
-	bool got_pdu(connection *c, char *b, int sz);
-
-	// register a handler
-	template<class S, class A1, class R>
-		void reg(unsigned int proc, S*, int (S::*meth)(const A1 a1, R & r));
-	template<class S, class A1, class A2, class R>
-		void reg(unsigned int proc, S*, int (S::*meth)(const A1 a1, const A2, 
-					R & r));
-	template<class S, class A1, class A2, class A3, class R>
-		void reg(unsigned int proc, S*, int (S::*meth)(const A1, const A2, 
-					const A3, R & r));
-	template<class S, class A1, class A2, class A3, class A4, class R>
-		void reg(unsigned int proc, S*, int (S::*meth)(const A1, const A2, 
-					const A3, const A4, R & r));
-	template<class S, class A1, class A2, class A3, class A4, class A5, class R>
-		void reg(unsigned int proc, S*, int (S::*meth)(const A1, const A2, 
-					const A3, const A4, const A5, 
-					R & r));
-	template<class S, class A1, class A2, class A3, class A4, class A5, class A6,
-		class R>
-			void reg(unsigned int proc, S*, int (S::*meth)(const A1, const A2, 
-						const A3, const A4, const A5, 
-						const A6, R & r));
-	template<class S, class A1, class A2, class A3, class A4, class A5, class A6,
-		class A7, class R>
-			void reg(unsigned int proc, S*, int (S::*meth)(const A1, const A2, 
-						const A3, const A4, const A5, 
-						const A6, const A7,
-						R & r));
-};
+    std::map<unsigned int, std::list<reply_t> > reply_window_;
 
-template<class S, class A1, class R> void
-rpcs::reg(unsigned int proc, S*sob, int (S::*meth)(const A1 a1, R & r))
-{
-	class h1 : public handler {
-		private:
-			S * sob;
-			int (S::*meth)(const A1 a1, R & r);
-		public:
-			h1(S *xsob, int (S::*xmeth)(const A1 a1, R & r))
-				: sob(xsob), meth(xmeth) { }
-			int fn(unmarshall &args, marshall &ret) {
-				A1 a1;
-				R r;
-				args >> a1;
-				if(!args.okdone())
-					return rpc_const::unmarshal_args_failure;
-				int b = (sob->*meth)(a1, r);
-				ret << r;
-				return b;
-			}
-	};
-	reg1(proc, new h1(sob, meth));
-}
+    void free_reply_window(void);
+    void add_reply(unsigned int clt_nonce, unsigned int xid, char *b, int sz);
 
-template<class S, class A1, class A2, class R> void
-rpcs::reg(unsigned int proc, S*sob, int (S::*meth)(const A1 a1, const A2 a2, 
-			R & r))
-{
-	class h1 : public handler {
-		private:
-			S * sob;
-			int (S::*meth)(const A1 a1, const A2 a2, R & r);
-		public:
-			h1(S *xsob, int (S::*xmeth)(const A1 a1, const A2 a2, R & r))
-				: sob(xsob), meth(xmeth) { }
-			int fn(unmarshall &args, marshall &ret) {
-				A1 a1;
-				A2 a2;
-				R r;
-				args >> a1;
-				args >> a2;
-				if(!args.okdone())
-					return rpc_const::unmarshal_args_failure;
-				int b = (sob->*meth)(a1, a2, r);
-				ret << r;
-				return b;
-			}
-	};
-	reg1(proc, new h1(sob, meth));
-}
+    rpcstate_t checkduplicate_and_update(unsigned int clt_nonce, 
+            unsigned int xid, unsigned int rep_xid,
+            char **b, int *sz);
 
-template<class S, class A1, class A2, class A3, class R> void
-rpcs::reg(unsigned int proc, S*sob, int (S::*meth)(const A1 a1, const A2 a2, 
-			const A3 a3, R & r))
-{
-	class h1 : public handler {
-		private:
-			S * sob;
-			int (S::*meth)(const A1 a1, const A2 a2, const A3 a3, R & r);
-		public:
-			h1(S *xsob, int (S::*xmeth)(const A1 a1, const A2 a2, const A3 a3, R & r))
-				: sob(xsob), meth(xmeth) { }
-			int fn(unmarshall &args, marshall &ret) {
-				A1 a1;
-				A2 a2;
-				A3 a3;
-				R r;
-				args >> a1;
-				args >> a2;
-				args >> a3;
-				if(!args.okdone())
-					return rpc_const::unmarshal_args_failure;
-				int b = (sob->*meth)(a1, a2, a3, r);
-				ret << r;
-				return b;
-			}
-	};
-	reg1(proc, new h1(sob, meth));
-}
+    void updatestat(unsigned int proc);
 
-template<class S, class A1, class A2, class A3, class A4, class R> void
-rpcs::reg(unsigned int proc, S*sob, int (S::*meth)(const A1 a1, const A2 a2, 
-			const A3 a3, const A4 a4, 
-			R & r))
-{
-	class h1 : public handler {
-		private:
-			S * sob;
-			int (S::*meth)(const A1 a1, const A2 a2, const A3 a3, const A4 a4, R & r);
-		public:
-			h1(S *xsob, int (S::*xmeth)(const A1 a1, const A2 a2, const A3 a3, 
-						const A4 a4, R & r))
-				: sob(xsob), meth(xmeth)  { }
-			int fn(unmarshall &args, marshall &ret) {
-				A1 a1;
-				A2 a2;
-				A3 a3;
-				A4 a4;
-				R r;
-				args >> a1;
-				args >> a2;
-				args >> a3;
-				args >> a4;
-				if(!args.okdone())
-					return rpc_const::unmarshal_args_failure;
-				int b = (sob->*meth)(a1, a2, a3, a4, r);
-				ret << r;
-				return b;
-			}
-	};
-	reg1(proc, new h1(sob, meth));
-}
+    // latest connection to the client
+    std::map<unsigned int, connection *> conns_;
 
-template<class S, class A1, class A2, class A3, class A4, class A5, class R> void
-rpcs::reg(unsigned int proc, S*sob, int (S::*meth)(const A1 a1, const A2 a2, 
-			const A3 a3, const A4 a4, 
-			const A5 a5, R & r))
-{
-	class h1 : public handler {
-		private:
-			S * sob;
-			int (S::*meth)(const A1 a1, const A2 a2, const A3 a3, const A4 a4, 
-					const A5 a5, R & r);
-		public:
-			h1(S *xsob, int (S::*xmeth)(const A1 a1, const A2 a2, const A3 a3, 
-						const A4 a4, const A5 a5, R & r))
-				: sob(xsob), meth(xmeth) { }
-			int fn(unmarshall &args, marshall &ret) {
-				A1 a1;
-				A2 a2;
-				A3 a3;
-				A4 a4;
-				A5 a5;
-				R r;
-				args >> a1;
-				args >> a2;
-				args >> a3;
-				args >> a4;
-				args >> a5;
-				if(!args.okdone())
-					return rpc_const::unmarshal_args_failure;
-				int b = (sob->*meth)(a1, a2, a3, a4, a5, r);
-				ret << r;
-				return b;
-			}
-	};
-	reg1(proc, new h1(sob, meth));
-}
+    // counting
+    const int counting_;
+    int curr_counts_;
+    std::map<int, int> counts_;
 
-template<class S, class A1, class A2, class A3, class A4, class A5, class A6, class R> void
-rpcs::reg(unsigned int proc, S*sob, int (S::*meth)(const A1 a1, const A2 a2, 
-			const A3 a3, const A4 a4, 
-			const A5 a5, const A6 a6, 
-			R & r))
-{
-	class h1 : public handler {
-		private:
-			S * sob;
-			int (S::*meth)(const A1 a1, const A2 a2, const A3 a3, const A4 a4, 
-					const A5 a5, const A6 a6, R & r);
-		public:
-			h1(S *xsob, int (S::*xmeth)(const A1 a1, const A2 a2, const A3 a3, 
-						const A4 a4, const A5 a5, const A6 a6, R & r))
-				: sob(xsob), meth(xmeth) { }
-			int fn(unmarshall &args, marshall &ret) {
-				A1 a1;
-				A2 a2;
-				A3 a3;
-				A4 a4;
-				A5 a5;
-				A6 a6;
-				R r;
-				args >> a1;
-				args >> a2;
-				args >> a3;
-				args >> a4;
-				args >> a5;
-				args >> a6;
-				if(!args.okdone())
-					return rpc_const::unmarshal_args_failure;
-				int b = (sob->*meth)(a1, a2, a3, a4, a5, a6, r);
-				ret << r;
-				return b;
-			}
-	};
-	reg1(proc, new h1(sob, meth));
-}
+    int lossytest_; 
+    bool reachable_;
 
-template<class S, class A1, class A2, class A3, class A4, class A5, 
-	class A6, class A7, class R> void
-rpcs::reg(unsigned int proc, S*sob, int (S::*meth)(const A1 a1, const A2 a2, 
-			const A3 a3, const A4 a4, 
-			const A5 a5, const A6 a6,
-			const A7 a7, R & r))
-{
-	class h1 : public handler {
-		private:
-			S * sob;
-			int (S::*meth)(const A1 a1, const A2 a2, const A3 a3, const A4 a4, 
-					const A5 a5, const A6 a6, const A7 a7, R & r);
-		public:
-			h1(S *xsob, int (S::*xmeth)(const A1 a1, const A2 a2, const A3 a3, 
-						const A4 a4, const A5 a5, const A6 a6,
-						const A7 a7, R & r))
-				: sob(xsob), meth(xmeth) { }
-			int fn(unmarshall &args, marshall &ret) {
-				A1 a1;
-				A2 a2;
-				A3 a3;
-				A4 a4;
-				A5 a5;
-				A6 a6;
-				A7 a7;
-				R r;
-				args >> a1;
-				args >> a2;
-				args >> a3;
-				args >> a4;
-				args >> a5;
-				args >> a6;
-				args >> a7;
-				if(!args.okdone())
-					return rpc_const::unmarshal_args_failure;
-				int b = (sob->*meth)(a1, a2, a3, a4, a5, a6, a7, r);
-				ret << r;
-				return b;
-			}
-	};
-	reg1(proc, new h1(sob, meth));
-}
+    // map proc # to function
+    std::map<int, handler *> procs_;
+
+    std::mutex procs_m_; // protect insert/delete to procs[]
+    std::mutex count_m_;  //protect modification of counts
+    std::mutex reply_window_m_; // protect reply window et al
+    std::mutex conss_m_; // protect conns_
+
+
+    protected:
+
+    struct djob_t {
+        djob_t (connection *c, char *b, int bsz):buf(b),sz(bsz),conn(c) {}
+        char *buf;
+        int sz;
+        connection *conn;
+    };
+    void dispatch(djob_t *);
 
+    // internal handler registration
+    void reg1(unsigned int proc, handler *);
+
+    ThrPool* dispatchpool_;
+    tcpsconn* listener_;
+
+    public:
+    rpcs(unsigned int port, int counts=0);
+    ~rpcs();
+    inline int port() { return listener_->port(); }
+    //RPC handler for clients binding
+    int rpcbind(int &r, int a);
+
+    void set_reachable(bool r) { reachable_ = r; }
+
+    bool got_pdu(connection *c, char *b, int sz);
+
+    template<class F, class C=void> void reg(unsigned int proc, F f, C *c=nullptr);
+};
+
+template<class F, class C> void rpcs::reg(unsigned int proc, F f, C *c) {
+    reg1(proc, marshalled_func<F, F, ReturnOnFailure>::wrap(f, c));
+}
 
 void make_sockaddr(const char *hostandport, struct sockaddr_in *dst);
 void make_sockaddr(const char *host, const char *port,
-		struct sockaddr_in *dst);
+        struct sockaddr_in *dst);
 
 #endif