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