Memory Allocation

[Enigma via Digitalmars-d-learn]

I have a memory buffer allocated using different methods. It is 
simply a pointer and a size.

I would like to be able to manage this buffer by treating it as a 
memory pool or heap. I think I can use allocators to do this but 
not sure how.

Effectively I want something like new or malloc but it pulls from 
the memory buffer rather than the program heap.

// Allocated once at program start
void* FancyBuffer = FancyAlloc(1000);


Then when I want to use the buffer I'll do stuff like



auto myptr = FancyMalloc(10);

....

FancyFree(myptr);


or whatever.

The main thing is, I don't want to have to write my own allocator 
to manage this buffer as it seems that D's allocators would do a 
better job.

I imagine that most of the time the buffer will not have more 
than one piece of code using it(no overlapping uses) but since I 
won't be 100% sure, I need allow for the cases where there might 
be overlapping usage. (else I wouldn't ever have to worry about 
"allocating or releasing" from it.

Thanks.