Nigel/BarinkOS
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Primitie listing rootdir of FAT16 filesystem

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Nigel Barink
2023-02-19 14:17:47 +01:00
parent 37542b736f
commit dbb147e110
8 changed files with 86 additions and 74 deletions
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10
source/kernel/memory/KernelHeap.cpp
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@ -1,7 +1,7 @@
#include "KernelHeap.h"
#include "VirtualMemoryManager.h"
extern "C" const uint32_t kernel_end;
// Size of heap meta data is 5 bytes
// Size of heap metadata is 5 bytes
struct heap_block{
uint8_t Used;
uint32_t Size;
@ -12,7 +12,7 @@ heap_block* start ;
void* malloc(size_t size)
{
printf("Received request for %d bytes of memory\n", size);
//printf("Received request for %d bytes of memory\n", size);
heap_block* current = start;
// look for a free block
@ -21,14 +21,14 @@ void* malloc(size_t size)
if(current->Size >= size && current->Used == false )
{
// We found a spot
printf("Block found!\n");
// printf("Block found!\n");
// Set the spot to in-use
current->Used = true;
// split the block
printf("Split block.\n");
//printf("Split block.\n");
uint32_t oldSize = current->Size;
current->Size = size;
@ -57,7 +57,7 @@ void free(void* addr)
{
// clear the free boolean that corresponds to this adddress
// This should be fairly simple
heap_block* allocatedBlock = (heap_block*)(addr - sizeof(heap_block));
heap_block* allocatedBlock = (heap_block*)((uint32_t)addr - sizeof(heap_block));
allocatedBlock->Used = false;
}