rom/exec/memory.h

   1 /*
   2     Copyright © 1995-2008, The AROS Development Team. All rights reserved.
   3     $Id$
   4
   5     Desc:
   6     Lang:
   7 */
   8 #ifndef _MEMORY_H_
   9 #define _MEMORY_H_
  10
  11 #include <exec/lists.h>
  12 #include <exec/semaphores.h>
  13 #include <exec/memory.h>
  14 #include <stddef.h>
  15
  16 #define RTPOTx4(a)      ((a)>2?4:(a)>1?2:1)
  17
  18 #define RTPOTx10(a)     ((a)>=4?RTPOTx4(((a)+3)/4)*4:RTPOTx4(a))
  19
  20 #define RTPOTx100(a)    \
  21 ((a)>=0x10?RTPOTx10(((a)+0xf)/0x10)*0x10:RTPOTx10(a))
  22
  23 #define RTPOTx10000(a)  \
  24 ((a)>=0x100?RTPOTx100(((a)+0xff)/0x100)*0x100:RTPOTx100(a))
  25
  26 #define RTPOTx100000000(a)      \
  27 ((a)>=0x10000?RTPOTx10000(((a)+0xffff)/0x10000)*0x10000:RTPOTx10000(a))
  28
  29 #define ROUNDUP_TO_POWER_OF_TWO(a)      RTPOTx100(a)
  30
  31 /* Some defines for the memory handling functions. */
  32
  33 /* This is for the alignment of memchunk structures. */
  34 #define MEMCHUNK_TOTAL  \
  35 ROUNDUP_TO_POWER_OF_TWO(AROS_WORSTALIGN>sizeof(struct MemChunk)? \
  36 AROS_WORSTALIGN:sizeof(struct MemChunk))
  37
  38 /* This allows to take the end of the MemHeader as the first MemChunk. */
  39 #define MEMHEADER_TOTAL \
  40 ((sizeof(struct MemHeader)+MEMCHUNK_TOTAL-1)&~(MEMCHUNK_TOTAL-1))
  41
  42 /* Private Pool structure */
  43 struct Pool
  44 {
  45     struct MinList PuddleList;
  46     struct MinList BlockList;
  47     ULONG Requirements;
  48     ULONG PuddleSize;
  49     ULONG ThreshSize;
  50 };
  51
  52 struct ProtectedPool
  53 {
  54     struct Pool            pool;
  55     struct SignalSemaphore sem;
  56 };
  57
  58 struct Block
  59 {
  60     struct MinNode Node;
  61     ULONG Size;
  62 };
  63
  64 #if AROS_MUNGWALL_DEBUG
  65 #include <aros/debug.h> /* for MUNGWALLHEADER_SIZE */
  66
  67 #define MUNGWALL_HEADER_ID 0x1ADEBCA1
  68
  69 /* This struct must not be bigger than MUNGWALLHEADER_SIZE!! */
  70
  71 struct MungwallHeader
  72 {
  73     union
  74     {
  75         struct
  76         {
  77             struct  MinNode     node;
  78             ULONG               magicid;
  79             ULONG               allocsize;
  80         } s;
  81         struct
  82         {
  83             UBYTE               blub[MUNGWALLHEADER_SIZE];
  84         } b;
  85     } u;
  86 };
  87
  88 #define mwh_node        u.s.node
  89 #define mwh_magicid     u.s.magicid
  90 #define mwh_allocsize   u.s.allocsize
  91
  92 #endif
  93
  94
  95 #define BLOCK_TOTAL \
  96 ((sizeof(struct Block)+AROS_WORSTALIGN-1)&~(AROS_WORSTALIGN-1))
  97
  98 #endif