allocAppendable() and getCapacity().

snazzy-d / sdc

The Snazzy D Compiler

MIT License

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Closed dsm9000 closed 1 year ago

dsm9000 commented 1 year ago

Appendability metadata, currently for large-sized allocs only. All large allocs are now considered appendable.
allocAppendable(): requests an appendable block of given size and saves the used capacity in the extent metadata.
getCapacity(): computes the capacity of a memory segment per the rules of https://dlang.org/spec/arrays.html#capacity-reserve .
realloc(): modified to behave correctly on appendable allocs.
Tests.

deadalnix commented 1 year ago

Also title doesn't really match what this does, and there is no description whatsoever...

deadalnix commented 1 year ago

Please update title/description and this can go in. Next step is extend.