source/libr2c2/blockallocator.h

   1 #ifndef LIBR2C2_BLOCKALLOCATOR_H_
   2 #define LIBR2C2_BLOCKALLOCATOR_H_
   3
   4 #include <list>
   5 #include <msp/datafile/objectloader.h>
   6 #include "blockiter.h"
   7 #include "sensor.h"
   8
   9 namespace R2C2 {
  10
  11 class Train;
  12
  13 class BlockAllocator
  14 {
  15 public:
  16         class Loader: public Msp::DataFile::ObjectLoader<BlockAllocator>
  17         {
  18         private:
  19                 Block *prev_block;
  20                 bool valid;
  21
  22         public:
  23                 Loader(BlockAllocator &);
  24
  25         private:
  26                 void block(unsigned);
  27                 void hint(unsigned);
  28         };
  29
  30         sigc::signal<void, Block &, Sensor *> signal_advanced;
  31         sigc::signal<void, Block &> signal_rear_advanced;
  32
  33 private:
  34         struct BlockMatch;
  35
  36         typedef std::list<BlockIter> BlockList;
  37
  38         Train &train;
  39         bool active;
  40         BlockList blocks;
  41         BlockList::iterator cur_blocks_end;
  42         Sensor *next_sensor;
  43         Block *pending_block;
  44         const Block *stop_at_block;
  45         bool reserving;
  46         bool advancing;
  47
  48 public:
  49         BlockAllocator(Train &);
  50
  51         void set_active(bool);
  52         bool is_active() const { return active; }
  53
  54         bool start_from(const BlockIter &);
  55         void rewind_to(const Block &);
  56         void clear();
  57         bool empty() const { return blocks.empty(); }
  58         void stop_at(const Block *);
  59
  60         const BlockIter &first() const;
  61         const BlockIter &last() const;
  62         const BlockIter &last_current() const;
  63         const BlockIter &iter_for(const Block &) const;
  64
  65         bool has_block(const Block &) const;
  66         bool is_block_current(const Block &) const;
  67
  68 private:
  69         void reserve_more();
  70         bool reserve_block(const BlockIter &);
  71         void advance_front(const Block *, bool);
  72         void advance_front(const Sensor *);
  73         void advance_back();
  74         void release_blocks_begin(const BlockList::iterator &);
  75         void release_blocks_end(const BlockList::iterator &);
  76         void release_block(const BlockList::iterator &);
  77 public:
  78         void reverse();
  79
  80 private:
  81         void turnout_path_changing(Track &);
  82         void turnout_path_changed(Track &);
  83         void block_reserved(Block &, const Train *);
  84         void sensor_state_changed(Sensor &, Sensor::State);
  85         void update_next_sensor(Sensor *);
  86         void halt_event(bool);
  87
  88 public:
  89         void save(std::list<Msp::DataFile::Statement> &) const;
  90 };
  91
  92 } // namepsace R2C2
  93
  94 #endif