dol/src/dol/visitor/cell/lib/ppu/WindowedFifo.h

   1 #ifndef _WINDOWEDFIFO_H_
   2 #define _WINDOWEDFIFO_H_
   3
   4 #include <stdio.h>
   5 #include <string.h>
   6
   7 #include "../constant.h"
   8
   9 #include "../lib/malloc_align.h"
  10 #include "../lib/free_align.h"
  11
  12 class WindowedFifo {
  13     public:
  14         WindowedFifo(unsigned size);
  15         virtual ~WindowedFifo();
  16
  17         // Write
  18                 virtual unsigned reserve(void** destination, unsigned len);
  19         virtual void release();
  20
  21         // Read
  22                 virtual unsigned capture(void** destination, unsigned len);
  23         virtual void consume();
  24
  25                 // General FIFO functions
  26         virtual unsigned used() const;
  27         virtual unsigned unused() const;
  28         virtual unsigned size() const;
  29
  30                 // DMA functions
  31         virtual char *getQueuePointer();
  32         virtual void dmaRead(unsigned len);
  33         virtual unsigned dmaStart();
  34         virtual bool dmaAllowed();
  35                 virtual unsigned dmaWrite(const void *source, unsigned len);
  36
  37                 // Global variables
  38                 unsigned _inTail;
  39     protected:
  40         char *_buffer;
  41
  42                 unsigned _head;
  43         unsigned _tail;
  44         unsigned _headRoom;
  45         unsigned _tailRoom;
  46
  47                 unsigned _size;
  48         unsigned _use;
  49
  50                 unsigned _writeReserve;
  51         unsigned _readReserve;
  52
  53                 bool _isHeadReserved;
  54         bool _isTailReserved;
  55
  56                 unsigned _blocked;      // Blocked number the request has to wait
  57         bool _activeDMA;        // Is there an active DMA on this buffer
  58
  59 };
  60
  61 #endif