pipes added

src/pipe.hpp

@@ -22,15 +22,117 @@
 
 #include "../include/zmq.h"
 
+#include "stdint.hpp"
+#include "i_endpoint.hpp"
 #include "ypipe.hpp"
 #include "config.hpp"
+#include "object.hpp"
 
 namespace zmq
 {
 
+    class reader_t : public object_t
+    {
+    public:
+
+        reader_t (class object_t *parent_, class pipe_t *pipe_,
+            uint64_t hwm_, uint64_t lwm_);
+        ~reader_t ();
+
+        //  Reads a message to the underlying pipe.
+        bool read (struct zmq_msg_t *msg_);
+
+        //  Mnaipulation of index of the pipe.
+        void set_endpoint (i_endpoint *endpoint_);
+        void set_index (int index_);
+        int get_index ();
+
+    private:
+
+        //  Command handlers.
+        void process_revive ();
+
+        //  The underlying pipe.
+        class pipe_t *pipe;
+
+        //  Pipe writer associated with the other side of the pipe.
+        class object_t *peer;
+
+        //  High and low watermarks for in-memory storage (in bytes).
+        uint64_t hwm;
+        uint64_t lwm;
+
+        //  Positions of head and tail of the pipe (in bytes).
+        uint64_t head;
+        uint64_t tail;
+        uint64_t last_sent_head;
+
+        //  Index of the pipe in the socket's list of inbound pipes.
+        int index;
+
+        //  Endpoint (either session or socket) the pipe is attached to.
+        i_endpoint *endpoint;
+
+        reader_t (const reader_t&);
+        void operator = (const reader_t&);
+    };
+
+    class writer_t : public object_t
+    {
+    public:
+
+        writer_t (class object_t *parent_, class pipe_t *pipe_,
+            uint64_t hwm_, uint64_t lwm_);
+        ~writer_t ();
+
+        //  Checks whether message with specified size can be written to the
+        //  pipe. If writing the message would cause high watermark to be
+        //  exceeded, the function returns false.
+        bool check_write (uint64_t size_);
+
+        //  Writes a message to the underlying pipe. Returns false if the
+        //  message cannot be written because high watermark was reached.
+        bool write (struct zmq_msg_t *msg_);
+
+        //  Flush the messages downsteam.
+        void flush ();
+
+    private:
+
+        //  The underlying pipe.
+        class pipe_t *pipe;
+
+        //  Pipe reader associated with the other side of the pipe.
+        class object_t *peer;
+
+        //  High and low watermarks for in-memory storage (in bytes).
+        uint64_t hwm;
+        uint64_t lwm;
+
+        //  Positions of head and tail of the pipe (in bytes).
+        uint64_t head;
+        uint64_t tail;
+
+        writer_t (const writer_t&);
+        void operator = (const writer_t&);
+    };
+
     //  Message pipe.
     class pipe_t : public ypipe_t <zmq_msg_t, false, message_pipe_granularity>
     {
+    public:
+
+        pipe_t (object_t *reader_parent_, object_t *writer_parent_,
+            uint64_t hwm_, uint64_t lwm_);
+        ~pipe_t ();
+
+        reader_t reader;
+        writer_t writer;
+
+    private:
+
+        pipe_t (const pipe_t&);
+        void operator = (const pipe_t&);
     };
 
 }