Use init-on-first-use for global state #275
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Otherwise global destructor ordering can result in the global state being destroyed before the last use. Not cleaning up does cause a small memory leak at shutdown, but it is limited to an empty map of domains and an empty unordered set of waitsets. Signed-off-by: Erik Boasson <eb@ilities.com>
clalancette
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Jan 6, 2021
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The code looks OK to me. There's one style error inline I've pointed out.
I also think we should add a comment above the gcdds() function explaining why we are doing this and the tradeoff of never calling the destructor. That will help future readers understand.
Finally, a CI run with this in place, both with and without ros2/rmw#293, would be good to ensure that the problem there is solved.
Signed-off-by: Erik Boasson <eb@ilities.com>
clalancette
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Jan 7, 2021
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Looks good to me. I'm going to go ahead and run full CI on this both for the current state of the world, and in combination with ros2/rmw#293 to make sure things are happy.
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CI with just this PR in place:
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CI with this PR and ros2/rmw#293:
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All right, looking at the CI results with just this PR in place:
So as far as I can tell this PR is ready to go. I'm going to go ahead and merge, thanks @eboasson ! |
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* Use init-on-first-use for global state Otherwise global destructor ordering can result in the global state being destroyed before the last use. Not cleaning up does cause a small memory leak at shutdown, but it is limited to an empty map of domains and an empty unordered set of waitsets. Signed-off-by: Erik Boasson <eb@ilities.com>
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May 18, 2022
* Use init-on-first-use for global state Otherwise global destructor ordering can result in the global state being destroyed before the last use. Not cleaning up does cause a small memory leak at shutdown, but it is limited to an empty map of domains and an empty unordered set of waitsets. Signed-off-by: Erik Boasson <eb@ilities.com>
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Otherwise global destructor ordering can result in the global state being
destroyed before the last use. Not cleaning up does cause a small memory leak
at shutdown, but it is limited to an empty map of domains and an empty
unordered set of waitsets.
Signed-off-by: Erik Boasson eb@ilities.com