Commits on Apr 19, 2021

1. Fixed memory_pool::min_block_size calculation …

   Previously, memory_pool::min_block_size() would not compute true node
   size in the same way that the individual free list implementations did.
   For instance, ordered_free_memory_list uses 2*node_size as debug fence
   memory, which memory_pool was disregarding. This could result in a
   failure at runtime, if the block was too small for a full node,
   including debug fences.
   
   Now, each free_list impl exposes "actual_node_size(n)", which produces
   the true required size, given the requested node size. This function is
   the same as what's used in the real internal size computations.
   
   Also hoisted fence_size() into constexpr functions in each free_list
   implementation, as well as added an "adjusted_node_size" function, which
   is mainly for readability, to avoid having "x > y ? x : y" repeated.
   
   Test added to exercise the bug.

   

   jwdevel committed Apr 19, 2021
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