p4_malloc
typically acts like the standard malloc, but may be rewritten for user
systems that require different operation.
p4_free
typically acts like the standard free, but may be rewritten for
user systems that require different operation.
p4_shmalloc
acts like the standard malloc except will obtain shared memory on
machines that support sharing memory among processes. Compare with
p4_malloc.
p4_shfree
frees memory obtained with p4_shmalloc. Compare with p4_free.
Shared Memory Data Types,Monitor-Building Primitives,Managing Shared and Local Memory,Functions for Shared Memory