Map Memory maps an entire file.

MapRegion Memory maps a region of a file.

If the ANON flag is set, the mapped memory will not be backed by a file.

COPY: maps the memory as copy-on-write.

EXEC: marks the mapped memory as executable.

RDONLY: maps the memory read-only.

RDWR: maps the memory as read-write.

MMap The byte array representation of the memory mapped file in memory.