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Viewing changes to mysys/lf_alloc-pin.c

manual merge 6.0-main --> 6.0-bka-review

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mysys/lf_alloc-pin.c
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    if (!(pins= top_ver % LF_PINBOX_MAX_PINS))
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    {
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      /* the stack of free elements is empty */
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      pins= my_atomic_add32(&pinbox->pins_in_array, 1)+1;
 
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      pins= my_atomic_add32((int32 volatile*) &pinbox->pins_in_array, 1)+1;
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      if (unlikely(pins >= LF_PINBOX_MAX_PINS))
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        return 0;
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      /*
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    }
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    el= (LF_PINS *)_lf_dynarray_value(&pinbox->pinarray, pins);
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    next= el->link;
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  } while (!my_atomic_cas32(&pinbox->pinstack_top_ver, &top_ver,
 
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  } while (!my_atomic_cas32((int32 volatile*) &pinbox->pinstack_top_ver,
 
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                            (int32*) &top_ver,
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                            top_ver-pins+next+LF_PINBOX_MAX_PINS));
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  /*
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    set el->link to the index of el in the dynarray (el->link has two usages:
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  do
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  {
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    pins->link= top_ver % LF_PINBOX_MAX_PINS;
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  } while (!my_atomic_cas32(&pinbox->pinstack_top_ver, &top_ver,
 
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  } while (!my_atomic_cas32((int32 volatile*) &pinbox->pinstack_top_ver,
 
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                            (int32*) &top_ver,
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                            top_ver-pins->link+nr+LF_PINBOX_MAX_PINS));
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  return;
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}
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  void *list, **addr;
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  struct st_lf_alloc_node *first, *last= NULL;
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  LF_PINBOX *pinbox= pins->pinbox;
 
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  LINT_INIT(first);
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  npins= pinbox->pins_in_array+1;
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#ifdef HAVE_ALLOCA
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/* lock-free memory allocator for fixed-size objects */
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LF_REQUIRE_PINS(1);
 
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LF_REQUIRE_PINS(1)
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/*
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  callback for _lf_pinbox_real_free to free a list of unpinned objects -