[ruby-core:101186] [Ruby master Feature#17356] Alignment of memory allocated through Fiddle struct's malloc

Issue #17356 has been updated by Eregon (Benoit Daloze).


IMHO, this feature is something that Fiddle or FFI should handle.
They can call malloc/posix_memalign/etc themselves of course.
I don't see a need to change anything so fundamental in the GC.

Fiddle/FFI can use finalizers if automatically freeing the memory is desired.

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Feature #17356: Alignment of memory allocated through Fiddle struct's malloc
https://bugs.ruby-lang.org/issues/17356#change-88867

* Author: AndreaRibuoli (Andrea Ribuoli)
* Status: Open
* Priority: Normal
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I am testing a low-level patch for **Ruby 3** that inside *gc.c* replaces:

  `TRY_WITH_GC(size, mem = malloc(size));`

with:

  `TRY_WITH_GC(size, mem = aligned_alloc(16,size));`

This should allow me to control that Fiddle returns pointers quad-words aligned.

Is it possible to introduce a configure parameter to control this kind of setting?

Refer to [issue opened on Fiddle](https://github.com/ruby/fiddle/issues/53).

Kind regards,

   Andrea Ribuoli



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