Avoid allocations during global initialization #689
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Instead, explicitly start lifetime of globals on library initialization. This is achieved by using the new ControlledLifetimeResource class. This can be used as a wrapper around globals to explicitly initialize and shutdown the objects. This wrapper has been applied to all non-trivial global data in RmlUi. Thus, there should no longer be any memory allocations occurring before `main()` when linking in RmlUi. We now give a warning if there are objects in user space that refer to any RmlUi resources at the end of `Rml::Shutdown`, as this prevents the library from cleaning up memory pools. Other than the warning, the behavior should be the same as previously. Breaking change: `Rml::ReleaseMemoryPools` is no longer exposed publicly. This function is automatically called during shutdown and should not be used manually.
mikke89
added
enhancement
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Hey mikke! Thanks for looking into this. I will attempt to get this tested on the specific platform we had issues with this weekend and will let you know what issues I run into. |
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Thanks for testing the PR, since it seems to be working for you I am merging it as is. |
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Instead, explicitly start lifetime of globals on library initialization. This is achieved by using the new ControlledLifetimeResource class. This can be used as a wrapper around globals to explicitly initialize and shutdown the objects.
This wrapper has been applied to all non-trivial global data in RmlUi. Thus, there should no longer be any memory allocations occurring before
main()when linking in RmlUi.We now give a warning if there are objects in user space that refer to any RmlUi resources at the end of
Rml::Shutdown, as this prevents the library from cleaning up memory pools. Other than the warning, the behavior should be the same as previously.Breaking change:
Rml::ReleaseMemoryPoolsis no longer exposed publicly. This function is automatically called during shutdown and should not be used manually.