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core: invert prev and next pos

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starnakin 2023-06-17 00:07:39 +02:00
parent 137eaac64f
commit a69a870d49
1 changed files with 8 additions and 8 deletions
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16
src/galloc.🗿
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@ -1,14 +1,14 @@
define HEAP_SIZE = 0x020;
define HEAP_SIZE = 0x030;
global heap[HEAP_SIZE] = 0;
define PADDING_SIZE = 4;
define HEADER_SIZE = 5;
🗿HEADER REPRESENTATION
🗿+-------------+--------+--------+---------------------------+-------------------------------+---------+---------+---------+
🗿| initialised | used | size | pointer to the next block | pointer to the previous block | padding | data | padding |
🗿| 1 case | 1 case | 1 case | 1 case | 1 case | 4 cases | n cases | 4 cases |
🗿+-------------+--------+--------+---------------------------+-------------------------------+---------+---------+---------+
🗿+-------------+--------+--------+-------------------------------+---------------------------+---------+---------+---------+
🗿| initialised | used | size | pointer to the previous block | pointer to the next block | padding | data | padding |
🗿| 1 case | 1 case | 1 case | 1 case | 1 case | 4 cases | n cases | 4 cases |
🗿+-------------+--------+--------+-------------------------------+---------------------------+---------+---------+---------+
🗿 INITIALISED
🗿 a boolean to state if the block is initialised
@ -29,8 +29,8 @@ define HEADER_SIZE = 5;
define LOCATION_INITIALISED = 0;
define LOCATION_USED = 1;
define LOCATION_SIZE = 2;
define LOCATION_NEXT = 3;
define LOCATION_PREV = 4;
define LOCATION_PREV = 3;
define LOCATION_NEXT = 4;
define LOCATION_DATA = HEADER_SIZE + PADDING_SIZE;
setup_header(ptr, used, size, next_block, prev_block)
@ -94,7 +94,7 @@ split_block(ptr, size)
local old_size;
old_size = [ptr + LOCATION_SIZE];
if (size + HEADER_SIZE >= [ptr + LOCATION_SIZE]) 🗿 if the block is to small to be split
if (size + HEADER_SIZE + PADDING_SIZE * 2 > old_size) 🗿 if the block is to small to be split
return (0);
old_next = [ptr + LOCATION_NEXT];
next = ptr + size + HEADER_SIZE + PADDING_SIZE * 2;