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note in docs that scheme_weak_reference isn't available in 3m

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svn: r11587
This commit is contained in:
Matthew Flatt 2008-09-09 11:28:09 +00:00
parent a67e1df015
commit 3ce9fd1953
1 changed files with 7 additions and 3 deletions
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10
collects/scribblings/inside/memory.scrbl
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@ -806,14 +806,18 @@ Registers the pointer @var{*p} as a weak pointer; when no other
(non-weak) pointers reference the same memory as @var{*p} references,
then @var{*p} will be set to @cpp{NULL} by the garbage collector. The
value in @var{*p} may change, but the pointer remains weak with
respect to the value of @var{*p} at the time @var{p} was registered.}
respect to the value of @var{*p} at the time @var{p} was registered.
This function is not available in 3m.}
@function[(void scheme_weak_reference_indirect
[void** p]
[void* v])]{
Like @cppi{scheme_weak_reference}, but @var{*p} is cleared
(regardless of its value) when there are no references to @var{v}.}
Like @cppi{scheme_weak_reference}, but @var{*p} is set to @cpp{NULL}
(regardless of its prior value) when there are no references to @var{v}.
This function is not available in 3m.}
@function[(void scheme_register_finalizer
[void* p]