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 &> signal_advanced;
  31
  32 private:
  33         struct BlockMatch;
  34
  35         typedef std::list<BlockIter> BlockList;
  36
  37         Train &train;
  38         bool active;
  39         BlockList blocks;
  40         BlockList::iterator cur_blocks_end;
  41         Sensor *next_sensor;
  42         Block *pending_block;
  43         const Block *stop_at_block;
  44         bool reserving;
  45         bool advancing;
  46
  47 public:
  48         BlockAllocator(Train &);
  49
  50         void set_active(bool);
  51         bool is_active() const { return active; }
  52
  53         bool start_from(const BlockIter &);
  54         void rewind_to(const Block &);
  55         void clear();
  56         bool empty() const { return blocks.empty(); }
  57         void stop_at(const Block *);
  58
  59         const BlockIter &first() const;
  60         const BlockIter &last() const;
  61         const BlockIter &last_current() const;
  62         const BlockIter &iter_for(const Block &) const;
  63
  64         bool has_block(const Block &) const;
  65         bool is_block_current(const Block &) const;
  66
  67 private:
  68         void reserve_more();
  69         bool reserve_block(const BlockIter &);
  70         void advance_front(const Block *, bool);
  71         void advance_front(const Sensor *);
  72         void advance_back();
  73         void release_blocks_begin(const BlockList::iterator &);
  74         void release_blocks_end(const BlockList::iterator &);
  75         void release_block(const BlockList::iterator &);
  76 public:
  77         void reverse();
  78
  79 private:
  80         void turnout_path_changing(Track &);
  81         void turnout_path_changed(Track &);
  82         void block_reserved(Block &, const Train *);
  83         void sensor_state_changed(Sensor &, Sensor::State);
  84         void update_next_sensor(Sensor *);
  85
  86 public:
  87         void save(std::list<Msp::DataFile::Statement> &) const;
  88 };
  89
  90 } // namepsace R2C2
  91
  92 #endif