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[loba.git] / process.h
1 #ifndef PROCESS_H
2 #define PROCESS_H
3
4 #define USE_UNORDERED_MAP 1
5 //#undef USE_UNORDERED_MAP
6
7 #include <vector>
8 #ifdef USE_UNORDERED_MAP
9 #  include <tr1/unordered_map>
10 #  define MAP_TEMPLATE std::tr1::unordered_map
11 #else
12 #  include <map>
13 #  define MAP_TEMPLATE std::map
14 #endif
15 #include <msg/msg.h>
16 #include "communicator.h"
17 #include "neighbor.h"
18
19 class process {
20 public:
21     static double get_total_load_init() { return total_load_init; }
22     static double get_total_load_exit() { return total_load_exit; }
23
24     process(int argc, char* argv[]);
25     virtual ~process();
26
27     int run();
28
29 protected:
30     typedef std::vector<neighbor> neigh_type;
31     typedef std::vector<neighbor*> pneigh_type;
32
33     pneigh_type pneigh;         // list of pointers to neighbors that
34                                 // we are free to reorder
35
36     // Returns the sum of "to_send" for all neighbors.
37     double sum_of_to_send() const;
38
39 private:
40     static double total_load_init;
41     static double total_load_exit;
42
43     typedef MAP_TEMPLATE<m_host_t, neighbor*> rev_neigh_type;
44     neigh_type neigh;           // list of neighbors (do not alter
45                                 // after construction!)
46     rev_neigh_type rev_neigh;   // map m_host_t -> neighbor
47
48     communicator comm;          // communicator for this process
49     int ctrl_close_pending;     // number of "close" messages to wait
50                                 // on ctrl channel
51     int data_close_pending;     // number of "close" messages to wait
52                                 // on data channel
53
54     unsigned iter;              // counter of iterations
55
56     double prev_load_broadcast; // used to ensure that we do not send
57                                 // a same information messages
58     double load;                // current load
59     double expected_load;       // expected load in bookkeeping mode
60
61     // The load balancing algorithm comes here...
62     // Parameter "my_load" is the load to take into account for myself
63     // (may be load or expected load).
64     // Returns the total load sent to neighbors.
65     virtual double load_balance(double my_load);
66
67     // Virtually do some computation
68     void compute();
69
70     // Send procedures, with helpers for bookkeeping mode or not
71     void send1_no_bookkeeping(neighbor& nb);
72     void send1_bookkeeping(neighbor& nb);
73     void send();
74
75     // Receive procedure: wait (or not) for a message to come.
76     // Returns false if some "close" message was received, returns true
77     // otherwise.
78     enum recv_wait_mode { NO_WAIT = 0, WAIT, WAIT_FOR_CLOSE };
79     bool receive(recv_wait_mode wait);
80
81     // Finalize sends a "close" message to each neighbor and wait for
82     // all of them to answer.
83     void finalize1(neighbor& nb);
84     void finalize();
85
86     // Print with given priority what we know about our neighbors' loads
87     void print_loads(e_xbt_log_priority_t logp = xbt_log_priority_info);
88 };
89
90 #endif // !PROCESS_H
91
92 // Local variables:
93 // mode: c++
94 // End: