(3dshm) - DSHM routines

Intro
introduction to Dynamically Mapped Shared Memory (DSHM)
dshm_alignment
get DSHM minimum map alignment
dshm_attach
attach DSHM segment
dshm_bufindex
get buffer index for mapped buffer
dshm_control
dynamically mapped shared memory control operations
dshm_detach
detach DSHM segment
dshm_get
create/lookup DSHM segment
dshm_map
map DSHM buffer
dshm_minmapsize
compute DSHM minimum map size
dshm_reattach
reattach DSHM segment (after fork)
dshm_unmap
unmap DSHM buffer
dshm_updatetlb
Update TLB to share outstanding DSHM mappings