- 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
There was a bug when the ready queue wasn't empty, but there was no
lower-priority fiber already in the queue. In that case the fiber wouldn't be
inserted. We want the loop just to advance the iterator, but to perform the
insert regardless of where the iterator ends up. (With this logic, empty() is
no longer a special case.)
Restore the ~Verbose() message.
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.
Add a note to the condition_variable::wait_for(..., pred) overload.
fiber_specific_ptr::reset() has no default argument.
Remove mention of launch policy deferred, since no API accepts a launch
policy argument.
Copy construction or copy assignment of a shared_future leaves other.valid()
unchanged. It won't be 'true' unless it was 'true' before.
Mention that [shared_]future::get_exception_ptr() does not invalidate.
Note that 'blocks' and 'suspends' are used interchangeably.
Add some cross-references; add link to std::allocator_arg_t. Clarify the
cross-reference to the paragraph describing BOOST_FIBERS_NO_ATOMICS.
Reformat some overly-long source lines.
When the running thread's main fiber calls this_fiber::properties<>() without
yet having passed through sched_algorithm_with_properties::awakened(), which
is what actually instantiates the fiber_properties subclass, you could end up
without a properties instance. Fortunately there's an easy workaround: call
yield().
Remove that workaround from examples/priority.cpp.
The complex logic to make a single pass through the ready queue to find the
old location and also the new insertion point was unfortunately error-prone.
Recast it as two separate passes: a simple search loop to find and unlink the
fiber_context*, then a call to awakened() to reinsert it in the correct place.
