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.
sched_algorithm_with_properties<> must intercept awakened() calls before
forwarding control to the subclass override. That pretty much requires two
different virtual methods: one for sched_algorithm subclasses WITHOUT
properties, the other for sched_algorithm_with_properties subclasses.
Originally we used a different name (awakened_props()), but that was
bothersome. It makes more sense to use a different awakened() overload
instead, one that passes in the relevant properties object.
Fix examples/priority.cpp accordingly.
Also delegate instantiation of a new properties object to new_properties()
virtual method. Overriding this method allows you to customize allocation,
instead of sched_algorithm_with_properties<> unconditionally putting the new
properties object on the heap. Validate the new_properties() return value.
