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1.1 KiB
1.1 KiB
The Memory Manager
The manager will init it self if there is no blocks, the manager is model after a double LinkedList and not a List.
Memory Layout
The layout has not preset list or table but rather every item has meta data linking the next and previous item this allows for a robust system.
The data layout looks as follow :
Block|Block|Block etc.
Block =
Meta Data|Data
Meta data =
4 bytes (preveus block address start)|4 bytes (next block address start)|4 bytes (curent[this] block size)| 4 bytes (curent[this] block flag)
```
BlockFlags :
```
Allocated = 0,
Free = 1,
```
the final layout looks like this:
```
4 bytes|4 bytes|4 bytes|4 bytes | (size of Block) bytes | 4 bytes|4 bytes|4 bytes | 4 bytes | (size of Block) bytes | etc
```
Note:
this means the smallest size an Block can occupy is 17 bytes, 16 bytes for the header and 1 for the smallest data type a byte.
# How this system is used.
### Allocation
Adding an Block is easy, you simply find the first free block using compare exchange and split it.
## Deallocation (free)
Freeing a block is easy set its flag(in meta data) to Free