Add ability to delay the beginning of computations.

[loba.git] / process.h

diff --git a/process.h b/process.h
index 24d4c395668b2d4209abaf6ddc5b4ebf8c315aa0..3e912f03c68186a860f3a16116f74018c93c7d06 100644 (file)
--- a/process.h
+++ b/process.h
@@ -4,7 +4,8 @@
 #define USE_UNORDERED_MAP 1
 //#undef USE_UNORDERED_MAP
 
-#include <vector>
+#include <algorithm>
+#include <tr1/functional>
 #ifdef USE_UNORDERED_MAP
 #  include <tr1/unordered_map>
 #  define MAP_TEMPLATE std::tr1::unordered_map
@@ -12,11 +13,15 @@
 #  include <map>
 #  define MAP_TEMPLATE std::map
 #endif
+#include <vector>
 #include <msg/msg.h>
 #include <xbt/log.h>
 #include "communicator.h"
+#include "misc.h"
+#include "msg_thread.h"
 #include "neighbor.h"
 #include "options.h"
+#include "synchro.h"
 
 class process {
 public:
@@ -44,10 +49,17 @@ protected:
     double get_load() const;
     void set_load(double load);
 
+    // The load balancing algorithm comes here...
+    virtual void load_balance();
+
     // Register some amount of load to send to given neighbor.
     void send(neighbor& nb, double amount);
     void send(neighbor* nb, double amount) { send(*nb, amount); }
 
+    // Sort pneigh by applying comp to their loads
+    template <typename Compare>
+    void pneigh_sort_by_load(const Compare& comp);
+
     // Calls neighbor::print(verbose, logp, cat) for each member of neigh.
     void print_loads(bool verbose = false,
                      e_xbt_log_priority_t logp = xbt_log_priority_info,
@@ -86,31 +98,30 @@ private:
     double real_load;           // current load
     double expected_load;       // expected load in bookkeeping mode
 
-    // The load balancing algorithm comes here...
-    virtual void load_balance();
+    mutex_t mutex;              // synchronization between threads
+    condition_t cond;
+
+    // Load-balancing loop
+    msg_thread* lb_thread;
+    void load_balance_loop();
 
-    // Virtually do some computation
-    void compute();
+    // Simulate computation loop
+    void compute_loop();
 
-    // Send procedures, with helpers for bookkeeping mode or not
-    void send1_no_bookkeeping(neighbor& nb);
-    void send1_bookkeeping(neighbor& nb);
-    void send_all();
+    bool still_running();
 
-    // Returns true if there remains neighbors to listen for
-    bool may_receive() const {
-        return ctrl_close_pending || data_close_pending;
-    }
+    // Send procedures
+    void ctrl_send(neighbor& nb);
+    void data_send(neighbor& nb);
+    void ctrl_close(neighbor& nb);
+    void data_close(neighbor& nb);
 
     // Receive procedure
     // Parameter "timeout" may be 0 for non-blocking operation, -1 for
     // infinite waiting, or any positive timeout.
-    void receive(double timeout);
-
-    // Finalize sends a "close" message to each neighbor and wait for
-    // all of them to answer.
-    void finalize1(neighbor& nb);
-    void finalize();
+    void ctrl_receive(double timeout);
+    void data_receive(double timeout);
+    void handle_message(message* msg, m_host_t from);
 };
 
 inline
@@ -131,6 +142,18 @@ void process::set_load(double load)
         real_load = load;
 }
 
+template <typename Compare>
+void process::pneigh_sort_by_load(const Compare& comp)
+{
+    using std::tr1::bind;
+    using std::tr1::placeholders::_1;
+    using std::tr1::placeholders::_2;
+    std::sort(pneigh.begin(), pneigh.end(),
+              bind(comp,
+                   bind(&neighbor::get_load, _1),
+                   bind(&neighbor::get_load, _2)));
+}
+
 #endif // !PROCESS_H
 
 // Local variables: