Note effect of BOOST_USE_SEGMENTED_STACKS if StackAllocator is not explicitly
passed.
Introduce function_heading_for QuickBook template to allow separate
descriptions of swap(fiber), swap(packaged_task) and swap(promise).
Document async() using C++14 std::result_of_t and std::decay_t, aligning with
std::async() documentation.
Rework when_any / when_all examples to use unbounded_channel throughout, since
we always close() the channel after the first value anyway. bounded_channel
doesn't really add much value here.
Make wait_first_outcome_impl() infer its channel pointer type. That way we can
reuse that function instead of coding a separate wait_all_until_error_impl(),
which differs only in using the nchannel facade instead of directly pushing to
unbounded_channel.
Explain use of std::bind() to bind a lambda.
Use a more nuanced discussion of promise lifetime in write_ec() example
function.
Use condition_variable::wait(lock, predicate) in a couple places in
work_sharing.cpp example.
- instead of using scheduling_algorithm::has_ready_fibers() use
a atomic counter as termination indication
- scheduling_algorithm::has_ready_fibers() returns true even if
only main-context and dispatcher-context are ready -> false indication
for work-sharing example
Instead, when the main fiber is passed to awakened(), stash it in a separate
slot and make pick_next() return it only when the shared queue is empty.
Update ready_fibers() to include a non-empty main_fiber slot.
