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ffi/com: repair for DCOM instance creation

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This commit is contained in:
Matthew Flatt 2012-08-27 08:50:48 -06:00
parent e44835117b
commit a523270025
1 changed files with 10 additions and 5 deletions
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15
collects/ffi/unsafe/com.rkt
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@ -472,7 +472,7 @@
[pAuthInfo _pointer]
[dwReserved2 _DWORD]))
(define-cstruct _MULTI_QI ([pIID _GUID-pointer]
[pItf _IUnknown-pointer]
[pItf _IUnknown-pointer/null]
[hr _HRESULT]))
(define-ole CoCreateInstance (_hfun _REFCLSID _pointer _DWORD _REFIID
@ -600,12 +600,17 @@
(bitwise-ior CLSCTX_LOCAL_SERVER CLSCTX_INPROC_SERVER)
IID_IUnknown)]
[else
(define csi (make-COSERVERINFO 0 (cast machine _system-string/utf-16 _pointer) #f 0))
(define cleanup (box null))
(define csi (parameterize ([current-cleanup cleanup])
(make-COSERVERINFO 0 machine #f 0)))
(define mqi (make-MULTI_QI IID_IUnknown #f 0))
(define unknown
(CoCreateInstanceEx clsid #f CLSCTX_REMOTE_SERVER (and machine csi) 1 mqi))
(when machine
(SysFreeString (COSERVERINFO-pwszName csi)))
(dynamic-wind
void
(lambda ()
(CoCreateInstanceEx clsid #f CLSCTX_REMOTE_SERVER (and machine csi) 1 mqi))
(lambda ()
(for ([proc (in-list (unbox cleanup))]) (proc)))))
(unless (and (zero? (MULTI_QI-hr mqi))
unknown)
(error who "unable to obtain IUnknown interface for remote server"))