Added class Schedule for threads

luprex/core/cpp/world.hpp

@@ -6,6 +6,7 @@
 #include "planemap.hpp"
 #include "idalloc.hpp"
 #include "animqueue.hpp"
+#include "sched.hpp"
 #include "source.hpp"
 #include "gui.hpp"
 #include "luasnap.hpp"
@@ -46,10 +47,6 @@ public:
 
 class World {
 public:
-    // A thread ID appended to a place ID.
-    //
-    using ThreadPair = std::pair<int64_t, int64_t>;
-
     // A lua intepreter with snapshot function.
     //
     LuaSnap lua_snap_;
@@ -64,14 +61,12 @@ public:
     PlaneMap plane_map_;
     std::unordered_map<int64_t, Tangible> tangibles_;
 
-    // Thread queue.
+    // Thread schedule: should include every thread, except
+    // for the one currently-executing thread.
     //
-    std::set<ThreadPair> thread_queue_;
-
-    void enqueue_thread(int64_t tid, int64_t place_id);
-    void run_thread_queue();
-    void run_thread(int64_t tid, int64_t place_id);
+    Schedule thread_sched_;
 
+    void run_scheduled_threads(int64_t clk);
 public:
     // Constructor.
     //