Supporting the Results Application (edit)

Cobalt Chemical Symbol Results

Supporting the Results Application (edit)#

This page describes the internal workings of this application and is intended to help you if you need to support the code.

Results uses the USEBIO file format.

Results uses Thomas Andrews’ Deal via Antony Lee’s Python wrapper anntzer/redeal

This relies on an installed binary which must match the operating system that Cobalt is running on. Binaries live in utils/bin, at the time of writing on Mac binaries can be found here.

The Deal package comes with the required Linux binaries, however you may need to build one for your environment (see below). The code is written in C.

Building the Binaries#

If you ever need to build the binaries from scratch, this will hopefully help.

From the command line of a suitable directory, run these commands:

git init
git remote add origin https://github.com/dds-bridge/dds.git
git pull origin develop
cd src

# Copy an appropriate make file. e.g.
cp Makefiles/Makefile_Mac_gcc_shared Makefile

Now edit Makefile to make the following changes:

  • comment out boost at the top

  • change compiler to gcc

Change the options that make complains about:

  • remove -fno-use-linker-plugin

  • remove -fopenmp

  • remove -Wlogical-op

  • remove -Wnoexcept

  • remove -Wstrict-null-sentinel

  • change -Wno-write-string to -Wno-write-strings

On Intel chips for Mac you also needed to remove -Wsign-conversion

make clean
make
# Copy file into your Python environment, e.g.
cp libdds.so /my_venv/lib/python3.7/site-packages/ddstable/libdds.so
# For non-virtual environments perhaps
sudo cp libdds.so /usr/local/lib/libdds.so

Performance#

The Results application calculates the double dummy makable contracts when a user requests to view a hand. If this becomes a performance bottleneck then this step could be moved to the file upload process and the double dummy analysis stored in the database.

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