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* Remove all uses of `using namespace std` from header files (although a
few specific cases of things like `using std::vector` remain)
* Move all existing uses of `using namespace std` in cpp files to after the
header includes
* Make coordinating changes so it builds again.
Qt6 builds on Windows were breaking because of namespace collision between
std::byte and some version of `byte` in one of Qt's namespaces. That breakage
is now fixed.
It would be good to systematically clean up all `using` declarations in header
files to ensure nothing is leaking out, but that's for another time.
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Defaults to two threads right now. This
can be changed in the Simulator constructor
for the time being. An interface will be
added for this soon.
For an example I tried, I got the following times on 500 simulations in a
macOS release build:
* Quackle 1.0.3 - 26 seconds
* master branch, 1 thread - 27 seconds
* master branch, 2 threads - 19 seconds
* master branch, 4 threads - 15 seconds
This isn't the most efficient use of threads.
It distributes all of the plays being simmed
into a thread pool, but only for one simulation.
Then it comes up for air and tries again.
This was the easiest to implement robustly
given the current architecture.
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The code running the simulation is now
disconnected from the Simulation class,
with appropriate members being copied into
a SimmedMoveConstants field (read-only,
thread-safe) and a SimmedMoveMessage
(the class for communicating per-sim data
to and from external threads).
The newly added static function,
Simulate::simulateOnePosition(), should now
be thread-safe and usable as a run function
for a thread.
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Break out things that are effectively constant
into a separate struct so we don't have to
keep initializing them. Also, ensure that all
of the things I forgot are abstracted so I
can break out the per-move simulation into
a different function.
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In prep for allowing sims to be handed off to a thread
pool.
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Also, extend copyright to 2019.
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Not a very interesting commit...only changes in comments.
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