Ongoing work on process logic...

[loba.git] / communicator.h

diff --git a/communicator.h b/communicator.h
index c18b662410b7614c4e6d8877d3b44c1aa8967c21..465d0cf573b3951abaeb54a109194c207710229d 100644 (file)
--- a/communicator.h
+++ b/communicator.h
@@ -6,16 +6,19 @@
 #include <list>
 #include <string>
 #include <msg/msg.h>
+#include "hostdata.h"
 
 class message {
 public:
-    enum message_type { INFO, CREDIT, LOAD, CLOSE };
+    enum message_type { INFO, CREDIT, LOAD, CTRL_CLOSE, DATA_CLOSE };
 
     message(message_type t, double a): type(t), amount(a) { }
 
     message_type get_type() const       { return type;   }
     double get_amount() const           { return amount; }
 
+    std::string to_string();
+
 private:
     message_type type;
     double amount;
@@ -26,28 +29,50 @@ public:
     communicator();
     ~communicator();
 
+    // Start to listen for incoming messages
+    void listen();
+
+    // Send a message to the "dest" mailbox
     void send(const char* dest, message* msg);
-    bool recv(message*& msg, m_host_t& from);
 
-    int send_backlog();
+    // Try to receive a message.  Returns true on success.
+    // If "wait" is true, blocks until success or error.
+    bool recv(message*& msg, m_host_t& from, bool wait);
+
+    // Try to flush pending sending communications.
+    // If "wait" is true, blocks until success.
+    void flush(bool wait);
+
+    // Advertise that the next "close" message is the last one, and
+    // that we do not await any message after that, either on the
+    // control or the data channel.
+    void next_close_on_ctrl_is_last();
+    void next_close_on_data_is_last();
 
 private:
+    // Myself
+    const hostdata* host;
+
     // List of pending send communications
     std::list<msg_comm_t> sent_comm;
+    static const int send_count_before_flush;
+    int send_counter;
 
     // Control channel for receiving
-    std::string ctrl_mbox;
-    msg_comm_t  ctrl_comm;
-    m_task_t    ctrl_task;
+    m_task_t    ctrl_task;          // receive buffer
+    msg_comm_t  ctrl_comm;          // receive communication
+    bool        ctrl_close_is_last; // do not rearm comm after next close
 
     // Data channel for receiving
-    std::string data_mbox;
-    msg_comm_t  data_comm;
-    m_task_t    data_task;
+    m_task_t    data_task;          // receive buffer
+    msg_comm_t  data_comm;          // receive communication
+    bool        data_close_is_last; // do not rearm comm after next close
+
+    const char* get_ctrl_mbox() const   { return host->get_ctrl_mbox(); }
+    const char* get_data_mbox() const   { return host->get_data_mbox(); }
 
-    const char* get_ctrl_mbox() const   { return ctrl_mbox.c_str(); }
-    const char* get_data_mbox() const   { return data_mbox.c_str(); }
-    void flush_sent();
+    // Used to test if a communication is over, and to destroy it if it is.
+    static bool comm_test_n_destroy(msg_comm_t comm);
 };
 
 #endif // !COMMUNICATOR_H