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scheme/foreign doc fixes related to _fpointer

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svn: r12966
This commit is contained in:
Matthew Flatt 2009-01-01 21:54:06 +00:00
parent 5e9b0c157a
commit 9f5976e46b
1 changed files with 7 additions and 3 deletions
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10
collects/scribblings/foreign/types.scrbl
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@ -282,7 +282,9 @@ PLT Scheme's C API.}
Similar to @scheme[_pointer], except that when an @scheme[_fpointer]
is extracted from a pointer produced by @scheme[ffi-obj-ref], then a
level of indirection is skipped. A level of indirection is similarly
skipped when extracting a pointer via @scheme[get-ffi-obj].
skipped when extracting a pointer via @scheme[get-ffi-obj]. Also
unlike @scheme[_pointer], @scheme[_fpointer] does not convert
@scheme[#f] to @cpp{NULL}.
A type generated by @scheme[_cprocedure] builds on @scheme[_fpointer],
and normally @scheme[_cprocedure] should be used instead of
@ -439,9 +441,11 @@ For example,
specifies a function that receives an integer and a string, but the
foreign function receives the string first.}
@defproc[(function-ptr [ptr cpointer?] [fun-type ctype?]) cpointer?]{
@defproc[(function-ptr [ptr-or-proc (or cpointer? procedure?)]
[fun-type ctype?])
cpointer?]{
Casts @scheme[ptr] to a function pointer of type @scheme[fun-type].}
Casts @scheme[ptr-or-proc] to a function pointer of type @scheme[fun-type].}
@; ----------------------------------------------------------------------