Karutoh/CustomHeapManager
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fixing issues from PR

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This commit is contained in:
Gregory Kenneth Bowne 2024-02-14 16:21:16 -08:00
parent 19b2e31119
commit fe9d9e3836
1 changed files with 56 additions and 43 deletions
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21
main.c
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@ -68,7 +68,7 @@ struct block *find_first(size_t s)
struct block *fragment_block(struct block *in, size_t s)
{
// Calculate the size of the new block, including the block header
size_t newBlockSize = ALIGN16(s) + BLOCK_SIZE;
size_t newBlockSize = s + BLOCK_SIZE;
// Check if the current block can be split
if (in->size <= newBlockSize)
@ -108,7 +108,8 @@ struct block *find_best_fit(size_t s)
{
if (current->free && current->size >= s)
{
if (!best_fit || current->size < best_fit->size)
if (best_fit && current->size < best_fit->size) // Check for NULL before comparison
{
{
best_fit = current;
}
@ -116,6 +117,7 @@ struct block *find_best_fit(size_t s)
current = current->next;
}
return best_fit;
}
}
/// Will find or allocate a memory block.
@ -221,11 +223,22 @@ void my_custom_free(void *ptr)
b->prev->next = b->next;
b = b->prev;
}
while (b->next && b->next->free)
// If there is a next block and it's free, merge with it
if (b->next && b->next->free)
{
// Merge with next block
b->size += BLOCK_SIZE + b->next->size;
b->next = b->next->next;
if (b->next)
{
b->next->prev = b;
}
}
// After merging, update the 'last' pointer if necessary
if (!b->next)
{
last = b;
}
// Check if we can shrink the heap