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A Pool represents a set of memory blocks that are all the same size. That size must be specified as a byte count when the Pool is created. For example:
Pool p (16);
creates a Pool called p, which represents a collection of 16-character memory blocks. Once a Pool has been created, it is impossible to change the size of the blocks that can be allocated from it.
To allocate a block from a Pool, use the alloc member function:
void* mem = p.alloc();
makes mem point at a newly-allocated block.
The free member function releases a block:
p.free(mem);
releases the block addressed by mem into the pool p . It is the programmer's responsibility to ensure that a block is released into the same pool that originated it.
When a Pool object is destroyed, all the memory in the Pool is freed.