communicator.h

   1 // Asynchronous communicator
   2
   3 #ifndef COMMUNICATOR_H
   4 #define COMMUNICATOR_H
   5
   6 #include <vector>
   7 #include <msg/msg.h>
   8 #include "hostdata.h"
   9 #include "messages.h"
  10 #include "msg_thread.h"
  11
  12 class communicator {
  13 public:
  14     communicator();
  15     ~communicator();
  16
  17     // Send a message to the "dest" mailbox
  18     void ctrl_send(const char* dest, message* msg) {
  19         ctrl_sent.push_back(real_send(dest, msg));
  20     }
  21     void data_send(const char* dest, message* msg) {
  22         data_sent.push_back(real_send(dest, msg));
  23     }
  24
  25     // Try to flush pending sending communications.
  26     // If "wait" is true, blocks until success.
  27     void ctrl_flush(bool wait) {
  28         real_flush(ctrl_sent, wait);
  29     }
  30     void data_flush(bool wait) {
  31         real_flush(data_sent, wait);
  32     }
  33
  34     // Flush all sending_communications.  Blocking.
  35     void flush_all();
  36
  37     // Try to get a message.  Returns true on success.
  38     // Parameter "timeout" may be 0 for non-blocking operation, -1 for
  39     // infinite waiting, or any positive timeout.
  40     bool ctrl_recv(message*& msg, m_host_t& from, double timeout) {
  41         return ctrl_received.pop(msg, from, timeout);
  42     }
  43     bool data_recv(message*& msg, m_host_t& from, double timeout) {
  44         return data_received.pop(msg, from, timeout);
  45     }
  46
  47 private:
  48     // Myself
  49     const hostdata* host;
  50
  51     // List of pending send communications
  52     typedef std::vector<msg_comm_t> sent_comm_type;
  53     sent_comm_type ctrl_sent;
  54     sent_comm_type data_sent;
  55
  56     msg_comm_t real_send(const char* dest, message* msg);
  57     void real_flush(sent_comm_type& sent_comm, bool wait);
  58
  59     // Queues of received messages
  60     message_queue ctrl_received;
  61     message_queue data_received;
  62
  63     // Handling of receiving thread
  64     msg_thread* receiver_thread;
  65     void receiver();
  66
  67     // Used to chek if a communication is successfull before destroying it
  68     static void comm_check_n_destroy(msg_comm_t comm);
  69     // If comm is over, call comm_check_n_destroy(comm), and return true
  70     static bool comm_test_n_destroy(msg_comm_t comm);
  71 };
  72
  73 #endif // !COMMUNICATOR_H
  74
  75 // Local variables:
  76 // mode: c++
  77 // End: