labormanager: rework for better behavior with 43.03

The main thing here is that the process loop exits if the DF process_job
or process_dig flags are set since if these are set the job list is
going to change soon anyway. The plugin also sets these flags when it
changes any labors, which has the side effect of effectively disabling
the process loop while DF is paused, which prevents flapping  while
editing job preferences in-game, and also allows changing job
preferences in game (although such changes may not last when the clock
starts up again).

plugins/devel/labormanager.cpp

@@ -528,23 +528,6 @@ struct dwarf_info_t
     {
     }
 
-
-    void set_labor(df::unit_labor labor)
-    {
-        if (labor >= 0 && labor <= ENUM_LAST_ITEM(unit_labor))
-        {
-            dwarf->status.labors[labor] = true;
-        }
-    }
-
-    void clear_labor(df::unit_labor labor)
-    {
-        if (labor >= 0 && labor <= ENUM_LAST_ITEM(unit_labor))
-        {
-            dwarf->status.labors[labor] = false;
-        }
-    }
-
 };
 
 /*
@@ -1621,6 +1604,8 @@ private:
     int plant_count;
     int detail_count;
 
+    bool labors_changed;
+
     int tool_count[TOOLS_MAX];
     bool reequip_needed[TOOLS_MAX];
 
@@ -1647,11 +1632,23 @@ private:
     std::list<dwarf_info_t*> busy_dwarfs;
 
 private:
+    void set_labor (dwarf_info_t* dwarf, df::unit_labor labor, bool value)
+    {
+        if (labor >= 0 && labor <= ENUM_LAST_ITEM(unit_labor))
+        {
+            bool old = dwarf->dwarf->status.labors[labor];
+            dwarf->dwarf->status.labors[labor] = value;
+            if (old != value)
+                labors_changed = true;
+        }
+    }
+
     void scan_buildings()
     {
         has_butchers = false;
         has_fishery = false;
         trader_requested = false;
+        labors_changed = false;
 
         for (auto b = world->buildings.all.begin(); b != world->buildings.all.end(); b++)
         {
@@ -1821,10 +1818,10 @@ private:
             }
 
             df::unit_labor labor = labor_mapper->find_job_labor (j);
-            labor_needed[labor]++;
 
             if (labor != df::unit_labor::NONE)
             {
+                labor_needed[labor]++;
                 if (worker == -1)
                 {
                     if (j->pos.isValid())
@@ -2088,7 +2085,7 @@ private:
                         if (labor == unit_labor::NONE)
                             continue;
 
-                        dwarf->clear_labor(labor);
+                        set_labor(dwarf, labor, false);
                     }
                 } else {
                     if (state == IDLE)
@@ -2152,6 +2149,9 @@ private:
 public:
     void process()
     {
+        if (*df::global::process_dig || *df::global::process_jobs)
+            return;
+
         release_dwarf_list();
 
         dig_count = tree_count = plant_count = detail_count = 0;
@@ -2266,6 +2266,9 @@ public:
         /* set requirements to zero for labors with currently idle dwarfs, and remove from requirement dwarfs actually working */
 
         FOR_ENUM_ITEMS(unit_labor, l) {
+            if (l == df::unit_labor::NONE)
+                continue;
+
             if (labor_infos[l].idle_dwarfs > 0)
                 labor_needed[l] = 0;
             else
@@ -2309,10 +2312,7 @@ public:
                     if (l == df::unit_labor::NONE)
                         continue;
 
-                    if (l == df::unit_labor::HAUL_FOOD)
+                    set_labor (*bestdwarf, l, l == df::unit_labor::HAUL_FOOD);
-                        (*bestdwarf)->set_labor(l);
-                    else
-                        (*bestdwarf)->clear_labor(l);
                 }
 
                 available_dwarfs.erase(bestdwarf);
@@ -2394,7 +2394,7 @@ public:
             std::list<dwarf_info_t*>::iterator bestdwarf = available_dwarfs.begin();
 
             int best_score = INT_MIN;
-            df::unit_labor best_labor = df::unit_labor::CLEAN;
+            df::unit_labor best_labor = df::unit_labor::NONE;
 
             for (auto j = to_assign.begin(); j != to_assign.end(); j++)
             {
@@ -2416,6 +2416,9 @@ public:
                 }
             }
 
+            if (best_labor == df::unit_labor::NONE)
+                break;
+
             if (print_debug)
                 out.print("assign \"%s\" labor %s score=%d\n", (*bestdwarf)->dwarf->name.first_name.c_str(), ENUM_KEY_STR(unit_labor, best_labor).c_str(), best_score);
 
@@ -2426,7 +2429,7 @@ public:
 
                 if (l == best_labor)
                 {
-                    (*bestdwarf)->set_labor(l);
+                    set_labor(*bestdwarf, l, true);
                     tools_enum t = default_labor_infos[l].tool;
                     if (t != TOOL_NONE)
                     {
@@ -2436,7 +2439,7 @@ public:
                     }
                 }
                 else if ((*bestdwarf)->state == IDLE)
-                    (*bestdwarf)->clear_labor(l);
+                    set_labor(*bestdwarf, l, false);
             }
 
             if (best_labor == df::unit_labor::HAUL_FOOD && priority_food > 0)
@@ -2479,7 +2482,7 @@ public:
                     tools_enum t = default_labor_infos[l].tool;
                     if (t == TOOL_NONE || (*d)->has_tool[t])
                     {
-                        (*d)->set_labor (l);
+                        set_labor(*d, l, true);
                         if (print_debug)
                             out.print("assign \"%s\" extra labor %s score=%d current %s score=%d\n",
                             (*d)->dwarf->name.first_name.c_str(),
@@ -2507,12 +2510,12 @@ public:
             {
                 if (l >= df::unit_labor::HAUL_STONE && l <= df::unit_labor::HAUL_ANIMALS &&
                     canary & (1 << l))
-                    canary_dwarf->set_labor(l);
+                    set_labor(canary_dwarf, l, true);
             }
 
             /* Also set the canary to remove constructions, because we have no way yet to tell if there are constructions needing removal */
 
-            canary_dwarf->set_labor(df::unit_labor::REMOVE_CONSTRUCTION);
+            set_labor(canary_dwarf, df::unit_labor::REMOVE_CONSTRUCTION, true);
 
             if (print_debug)
                 out.print ("Setting %s as the hauling canary\n", canary_dwarf->dwarf->name.first_name.c_str());
@@ -2531,11 +2534,12 @@ public:
             {
                 if (l >= df::unit_labor::HAUL_STONE && l <= df::unit_labor::HAUL_ANIMALS &&
                     canary & (1 << l))
-                    (*d)->set_labor(l);
+                    set_labor(*d, l, true);
+                else if (l == df::unit_labor::CLEAN || l == df::unit_labor::REMOVE_CONSTRUCTION)
+                    set_labor(*d, l, true);
+                else
+                    set_labor(*d, l, false);
             }
-
-            (*d)->set_labor(df::unit_labor::CLEAN);
-            (*d)->set_labor(df::unit_labor::REMOVE_CONSTRUCTION);
         }
 
         /* set reequip on any dwarfs who are carrying tools needed by others */
@@ -2558,7 +2562,11 @@ public:
 
         release_dwarf_list();
 
-        *df::global::process_jobs = true;
+        if (labors_changed)
+        {
+            *df::global::process_dig = true;
+            *df::global::process_jobs = true;
+        }
 
         print_debug = 0;