Parallel
programming
support
in
popular
programming
languages
such
as
C
and
C++ 
has
not
kept
pace
with
the
recent
proliferation
of
multi-core
architectures
Operating
systems 
do
provides
APIs
for
writing
parallel
programs
but
these
APIs
are
sufficiently
dissimilar
that
choosing
one
ties
the
code
to
a
particular
environment
The
APIs
also
require
programmers
to
deal
with
concepts
such
as
threads
stacks
and
other
details
that
are
not
an
integral
part
of
the
problem
being
solved
For
these
reasons
it
is
hard
to
begin
writing
parallel
programs