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87551c5419
Highlight predicate condition_variable::wait() method in condition_variable front matter. Rewrite the explanation of wait()'s Precondition. Add a condition_variables subsection about no spurious condition_variable wakeups. Remove "or spuriously" from wakeup conditions in wait*() methods. First pass through "spurious wakeup" section in Rationale. First pass through migration.qbk. Use lock_t throughout work_sharing.cpp, instead of lock_t, lock_count and explicit std::unique_lock<std::mutex> declarations. Unify treatment of main and dispatcher fibers. Clarify thread-safety requirements on sched_algorithm::notify() and suspend_until(). Clarify disable_interruption when rethrowing fiber_interrupted. Consolidate future<T>::get(): returns T whether T is R, R& or void. Mention nesting of disable_interruption (which matters) versus nesting of restore_interruption (which doesn't). Mention that a disable_interruption constructed within the scope of another disable_interruption is a no-op, both itself and when passed to restore_interruption. When packaged_task::operator()() stores a value or an exception, state "as if" by promise::set_value() or set_exception(): the shared state is set ready. Similarly for ~packaged_task() and ~promise() setting broken_promise. Sprinkle links to the Allocator concept, std::allocator and std::allocator_arg_t where referenced. Similarly for StackAllocator. Add more cross-reference links where Fiber classes and methods are mentioned. Also things like std::unique_lock and std::mutex. Clarify error condition for value_pop() when channel is close()d. Since fiber_specific_ptr::release() does not invoke cleanup, it should not throw an exception raised during cleanup.