Commits
Philipp Moritz authored and Krisztián Szűcs committed d00497b38be
ARROW-4983: [Plasma] Unmap memory upon destruction of the PlasmaClient Author: Philipp Moritz <pcmoritz@gmail.com> Author: Robert Nishihara <robertnishihara@gmail.com> Closes #4001 from pcmoritz/plasma-client-unmap and squashes the following commits: 893bcdc1 <Robert Nishihara> Update client.cc 784f9afd <Philipp Moritz> add documentation 7988a85d <Philipp Moritz> add PlasmaMutableBuffer class 0a6203b5 <Philipp Moritz> fixes af51c7ac <Philipp Moritz> add documentation 53e4b1de <Philipp Moritz> unmap files in plasma client destructor