src/add-ons/media/media-add-ons/mixer/RtList.h

   1 /*
   2  * Copyright 2003 Marcus Overhagen
   3  * Distributed under the terms of the MIT License.
   4  */
   5 #ifndef _MEDIA_RT_LIST_H
   6 #define _MEDIA_RT_LIST_H
   7
   8
   9 /*!     A simple list template that uses realtime
  10         memory and does no error checking. Since
  11         it doesn't call constructors or destructors,
  12         don't use it to store objects.
  13
  14         // TODO: no error checking? Great.
  15 */
  16
  17
  18 #include <RealtimeAlloc.h>
  19
  20
  21 template<class value> class RtList {
  22 public:
  23         RtList()
  24                 :
  25                 item_max(INIT_COUNT),
  26                 item_count(0),
  27                 items((value*)rtm_alloc(NULL, sizeof(value) * INIT_COUNT))
  28         {
  29         }
  30
  31         ~RtList()
  32         {
  33                 rtm_free(items);
  34         }
  35
  36         value* Create()
  37         {
  38                 if (item_count == item_max) {
  39                         item_max += INC_COUNT;
  40                         rtm_realloc((void**)&items, sizeof(value) * item_max);
  41                 }
  42                 return &items[item_count++];
  43         }
  44
  45         value* ItemAt(int index)
  46         {
  47                 return &items[index];
  48         }
  49
  50         int CountItems()
  51         {
  52                 return item_count;
  53         }
  54
  55         void MakeEmpty()
  56         {
  57                 item_count = 0;
  58         }
  59
  60 private:
  61         RtList(const RtList<value>& other);
  62         RtList<value> &operator=(const RtList<value>& other);
  63
  64 private:
  65         enum { INIT_COUNT = 8, INC_COUNT = 16 };
  66
  67         int             item_max;
  68         int             item_count;
  69         value*  items;
  70 };
  71
  72 #endif // _MEDIA_RT_LIST_H