dsForeigns :: [LForeignDecl Id]
-> DsM (ForeignStubs, [Binding])
dsForeigns []
- = returnDs (NoStubs, [])
-dsForeigns fos
- = do
+ = return (NoStubs, [])
+dsForeigns fos = do
fives <- mapM do_ldecl fos
let
(hs, cs, hdrs, idss, bindss) = unzip5 fives
where
do_ldecl (L loc decl) = putSrcSpanDs loc (do_decl decl)
- do_decl (ForeignImport id _ spec)
- = traceIf (text "fi start" <+> ppr id) `thenDs` \ _ ->
- dsFImport (unLoc id) spec `thenDs` \ (bs, h, c, mbhd) ->
- traceIf (text "fi end" <+> ppr id) `thenDs` \ _ ->
- returnDs (h, c, maybeToList mbhd, [], bs)
-
- do_decl (ForeignExport (L _ id) _ (CExport (CExportStatic ext_nm cconv)))
- = dsFExport id (idType id)
- ext_nm cconv False `thenDs` \(h, c, _, _) ->
- returnDs (h, c, [], [id], [])
+ do_decl (ForeignImport id _ spec) = do
+ traceIf (text "fi start" <+> ppr id)
+ (bs, h, c, mbhd) <- dsFImport (unLoc id) spec
+ traceIf (text "fi end" <+> ppr id)
+ return (h, c, maybeToList mbhd, [], bs)
+
+ do_decl (ForeignExport (L _ id) _ (CExport (CExportStatic ext_nm cconv))) = do
+ (h, c, _, _) <- dsFExport id (idType id) ext_nm cconv False
+ return (h, c, [], [id], [])
\end{code}
dsFImport :: Id
-> ForeignImport
-> DsM ([Binding], SDoc, SDoc, Maybe FastString)
-dsFImport id (CImport cconv safety header lib spec)
- = dsCImport id spec cconv safety no_hdrs `thenDs` \(ids, h, c) ->
- returnDs (ids, h, c, if no_hdrs then Nothing else Just header)
+dsFImport id (CImport cconv safety header lib spec) = do
+ (ids, h, c) <- dsCImport id spec cconv safety no_hdrs
+ return (ids, h, c, if no_hdrs then Nothing else Just header)
where
no_hdrs = nullFS header
-- FIXME: the `lib' field is needed for .NET ILX generation when invoking
-- routines that are external to the .NET runtime, but GHC doesn't
-- support such calls yet; if `nullFastString lib', the value was not given
-dsFImport id (DNImport spec)
- = dsFCall id (DNCall spec) True {- No headers -} `thenDs` \(ids, h, c) ->
- returnDs (ids, h, c, Nothing)
+dsFImport id (DNImport spec) = do
+ (ids, h, c) <- dsFCall id (DNCall spec) True {- No headers -}
+ return (ids, h, c, Nothing)
dsCImport :: Id
-> CImportSpec
-> Safety
-> Bool -- True <=> no headers in the f.i decl
-> DsM ([Binding], SDoc, SDoc)
-dsCImport id (CLabel cid) _ _ no_hdrs
- = resultWrapper (idType id) `thenDs` \ (resTy, foRhs) ->
+dsCImport id (CLabel cid) _ _ no_hdrs = do
+ (resTy, foRhs) <- resultWrapper (idType id)
ASSERT(fromJust resTy `coreEqType` addrPrimTy) -- typechecker ensures this
let rhs = foRhs (mkLit (MachLabel cid Nothing)) in
- returnDs ([(setImpInline no_hdrs id, rhs)], empty, empty)
+ return ([(setImpInline no_hdrs id, rhs)], empty, empty)
dsCImport id (CFunction target) cconv safety no_hdrs
= dsFCall id (CCall (CCallSpec target cconv safety)) no_hdrs
dsCImport id CWrapper cconv _ _
%************************************************************************
\begin{code}
-dsFCall fn_id fcall no_hdrs
- = let
- ty = idType fn_id
- (tvs, fun_ty) = tcSplitForAllTys ty
- (arg_tys, io_res_ty) = tcSplitFunTys fun_ty
- -- Must use tcSplit* functions because we want to
- -- see that (IO t) in the corner
- in
- newSysLocalsDs arg_tys `thenDs` \ args ->
- mapAndUnzipDs unboxArg (map Var args) `thenDs` \ (val_args, arg_wrappers) ->
+dsFCall fn_id fcall no_hdrs = do
+ let
+ ty = idType fn_id
+ (tvs, fun_ty) = tcSplitForAllTys ty
+ (arg_tys, io_res_ty) = tcSplitFunTys fun_ty
+ -- Must use tcSplit* functions because we want to
+ -- see that (IO t) in the corner
+
+ args <- newSysLocalsDs arg_tys
+ (val_args, arg_wrappers) <- mapAndUnzipM unboxArg (map Var args)
let
- work_arg_ids = [v | Var v <- val_args] -- All guaranteed to be vars
+ work_arg_ids = [v | Var v <- val_args] -- All guaranteed to be vars
- forDotnet =
- case fcall of
- DNCall{} -> True
- _ -> False
+ forDotnet =
+ case fcall of
+ DNCall{} -> True
+ _ -> False
- topConDs
- | forDotnet =
- dsLookupGlobalId checkDotnetResName `thenDs` \ check_id ->
- return (Just check_id)
+ topConDs
+ | forDotnet = Just <$> dsLookupGlobalId checkDotnetResName
| otherwise = return Nothing
-
- augmentResultDs
- | forDotnet =
- newSysLocalDs addrPrimTy `thenDs` \ err_res ->
- returnDs (\ (mb_res_ty, resWrap) ->
- case mb_res_ty of
- Nothing -> (Just (mkTyConApp (tupleTyCon Unboxed 1)
- [ addrPrimTy ]),
- resWrap)
- Just x -> (Just (mkTyConApp (tupleTyCon Unboxed 2)
- [ x, addrPrimTy ]),
- resWrap))
- | otherwise = returnDs id
- in
- augmentResultDs `thenDs` \ augment ->
- topConDs `thenDs` \ topCon ->
- boxResult augment topCon io_res_ty `thenDs` \ (ccall_result_ty, res_wrapper) ->
-
- newUnique `thenDs` \ ccall_uniq ->
- newUnique `thenDs` \ work_uniq ->
+
+ augmentResultDs
+ | forDotnet = do
+ err_res <- newSysLocalDs addrPrimTy
+ return (\ (mb_res_ty, resWrap) ->
+ case mb_res_ty of
+ Nothing -> (Just (mkTyConApp (tupleTyCon Unboxed 1)
+ [ addrPrimTy ]),
+ resWrap)
+ Just x -> (Just (mkTyConApp (tupleTyCon Unboxed 2)
+ [ x, addrPrimTy ]),
+ resWrap))
+ | otherwise = return id
+
+ augment <- augmentResultDs
+ topCon <- topConDs
+ (ccall_result_ty, res_wrapper) <- boxResult augment topCon io_res_ty
+
+ ccall_uniq <- newUnique
+ work_uniq <- newUnique
let
- -- Build the worker
- worker_ty = mkForAllTys tvs (mkFunTys (map idType work_arg_ids) ccall_result_ty)
- the_ccall_app = mkFCall ccall_uniq fcall val_args ccall_result_ty
- work_rhs = mkLams tvs (mkLams work_arg_ids the_ccall_app)
- work_id = setImpInline no_hdrs $ -- See comments with setImpInline
- mkSysLocal FSLIT("$wccall") work_uniq worker_ty
-
- -- Build the wrapper
- work_app = mkApps (mkVarApps (Var work_id) tvs) val_args
- wrapper_body = foldr ($) (res_wrapper work_app) arg_wrappers
+ -- Build the worker
+ worker_ty = mkForAllTys tvs (mkFunTys (map idType work_arg_ids) ccall_result_ty)
+ the_ccall_app = mkFCall ccall_uniq fcall val_args ccall_result_ty
+ work_rhs = mkLams tvs (mkLams work_arg_ids the_ccall_app)
+ work_id = setImpInline no_hdrs $ -- See comments with setImpInline
+ mkSysLocal FSLIT("$wccall") work_uniq worker_ty
+
+ -- Build the wrapper
+ work_app = mkApps (mkVarApps (Var work_id) tvs) val_args
+ wrapper_body = foldr ($) (res_wrapper work_app) arg_wrappers
wrap_rhs = mkInlineMe (mkLams (tvs ++ args) wrapper_body)
- in
- returnDs ([(work_id, work_rhs), (fn_id, wrap_rhs)], empty, empty)
+
+ return ([(work_id, work_rhs), (fn_id, wrap_rhs)], empty, empty)
\end{code}
, Int -- size of args to stub function
)
-dsFExport fn_id ty ext_name cconv isDyn
- =
- let
- (_tvs,sans_foralls) = tcSplitForAllTys ty
- (fe_arg_tys', orig_res_ty) = tcSplitFunTys sans_foralls
- -- We must use tcSplits here, because we want to see
- -- the (IO t) in the corner of the type!
- fe_arg_tys | isDyn = tail fe_arg_tys'
- | otherwise = fe_arg_tys'
- in
- -- Look at the result type of the exported function, orig_res_ty
- -- If it's IO t, return (t, True)
- -- If it's plain t, return (t, False)
- (case tcSplitIOType_maybe orig_res_ty of
- Just (ioTyCon, res_ty, co) -> returnDs (res_ty, True)
- -- The function already returns IO t
- -- ToDo: what about the coercion?
- Nothing -> returnDs (orig_res_ty, False)
- -- The function returns t
- ) `thenDs` \ (res_ty, -- t
- is_IO_res_ty) -> -- Bool
- returnDs $
- mkFExportCBits ext_name
- (if isDyn then Nothing else Just fn_id)
- fe_arg_tys res_ty is_IO_res_ty cconv
+dsFExport fn_id ty ext_name cconv isDyn= do
+ let
+ (_tvs,sans_foralls) = tcSplitForAllTys ty
+ (fe_arg_tys', orig_res_ty) = tcSplitFunTys sans_foralls
+ -- We must use tcSplits here, because we want to see
+ -- the (IO t) in the corner of the type!
+ fe_arg_tys | isDyn = tail fe_arg_tys'
+ | otherwise = fe_arg_tys'
+
+ -- Look at the result type of the exported function, orig_res_ty
+ -- If it's IO t, return (t, True)
+ -- If it's plain t, return (t, False)
+ (res_ty, -- t
+ is_IO_res_ty) <- -- Bool
+ case tcSplitIOType_maybe orig_res_ty of
+ Just (ioTyCon, res_ty, co) -> return (res_ty, True)
+ -- The function already returns IO t
+ -- ToDo: what about the coercion?
+ Nothing -> return (orig_res_ty, False)
+ -- The function returns t
+
+ return $
+ mkFExportCBits ext_name
+ (if isDyn then Nothing else Just fn_id)
+ fe_arg_tys res_ty is_IO_res_ty cconv
\end{code}
@foreign import "wrapper"@ (previously "foreign export dynamic") lets
dsFExportDynamic :: Id
-> CCallConv
-> DsM ([Binding], SDoc, SDoc)
-dsFExportDynamic id cconv
- = newSysLocalDs ty `thenDs` \ fe_id ->
- getModuleDs `thenDs` \ mod ->
- let
+dsFExportDynamic id cconv = do
+ fe_id <- newSysLocalDs ty
+ mod <- getModuleDs
+ let
-- hack: need to get at the name of the C stub we're about to generate.
- fe_nm = mkFastString (unpackFS (zEncodeFS (moduleNameFS (moduleName mod))) ++ "_" ++ toCName fe_id)
- in
- newSysLocalDs arg_ty `thenDs` \ cback ->
- dsLookupGlobalId newStablePtrName `thenDs` \ newStablePtrId ->
- dsLookupTyCon stablePtrTyConName `thenDs` \ stable_ptr_tycon ->
- let
- stable_ptr_ty = mkTyConApp stable_ptr_tycon [arg_ty]
- export_ty = mkFunTy stable_ptr_ty arg_ty
- in
- dsLookupGlobalId bindIOName `thenDs` \ bindIOId ->
- newSysLocalDs stable_ptr_ty `thenDs` \ stbl_value ->
- dsFExport id export_ty fe_nm cconv True
- `thenDs` \ (h_code, c_code, typestring, args_size) ->
- let
- {-
- The arguments to the external function which will
- create a little bit of (template) code on the fly
- for allowing the (stable pointed) Haskell closure
- to be entered using an external calling convention
- (stdcall, ccall).
- -}
- adj_args = [ mkIntLitInt (ccallConvToInt cconv)
- , Var stbl_value
- , mkLit (MachLabel fe_nm mb_sz_args)
- , mkLit (mkStringLit typestring)
- ]
- -- name of external entry point providing these services.
- -- (probably in the RTS.)
- adjustor = FSLIT("createAdjustor")
-
- -- Determine the number of bytes of arguments to the stub function,
- -- so that we can attach the '@N' suffix to its label if it is a
- -- stdcall on Windows.
- mb_sz_args = case cconv of
- StdCallConv -> Just args_size
- _ -> Nothing
-
- in
- dsCCall adjustor adj_args PlayRisky (mkTyConApp io_tc [res_ty]) `thenDs` \ ccall_adj ->
- -- PlayRisky: the adjustor doesn't allocate in the Haskell heap or do a callback
-
- let io_app = mkLams tvs $
- Lam cback $
- mkCoerceI (mkSymCoI co) $
- mkApps (Var bindIOId)
- [ Type stable_ptr_ty
- , Type res_ty
- , mkApps (Var newStablePtrId) [ Type arg_ty, Var cback ]
- , Lam stbl_value ccall_adj
- ]
-
- fed = (id `setInlinePragma` NeverActive, io_app)
- -- Never inline the f.e.d. function, because the litlit
- -- might not be in scope in other modules.
- in
- returnDs ([fed], h_code, c_code)
+ fe_nm = mkFastString (unpackFS (zEncodeFS (moduleNameFS (moduleName mod))) ++ "_" ++ toCName fe_id)
+
+ cback <- newSysLocalDs arg_ty
+ newStablePtrId <- dsLookupGlobalId newStablePtrName
+ stable_ptr_tycon <- dsLookupTyCon stablePtrTyConName
+ let
+ stable_ptr_ty = mkTyConApp stable_ptr_tycon [arg_ty]
+ export_ty = mkFunTy stable_ptr_ty arg_ty
+ bindIOId <- dsLookupGlobalId bindIOName
+ stbl_value <- newSysLocalDs stable_ptr_ty
+ (h_code, c_code, typestring, args_size) <- dsFExport id export_ty fe_nm cconv True
+ let
+ {-
+ The arguments to the external function which will
+ create a little bit of (template) code on the fly
+ for allowing the (stable pointed) Haskell closure
+ to be entered using an external calling convention
+ (stdcall, ccall).
+ -}
+ adj_args = [ mkIntLitInt (ccallConvToInt cconv)
+ , Var stbl_value
+ , mkLit (MachLabel fe_nm mb_sz_args)
+ , mkLit (mkStringLit typestring)
+ ]
+ -- name of external entry point providing these services.
+ -- (probably in the RTS.)
+ adjustor = FSLIT("createAdjustor")
+
+ -- Determine the number of bytes of arguments to the stub function,
+ -- so that we can attach the '@N' suffix to its label if it is a
+ -- stdcall on Windows.
+ mb_sz_args = case cconv of
+ StdCallConv -> Just args_size
+ _ -> Nothing
+
+ ccall_adj <- dsCCall adjustor adj_args PlayRisky (mkTyConApp io_tc [res_ty])
+ -- PlayRisky: the adjustor doesn't allocate in the Haskell heap or do a callback
+
+ let io_app = mkLams tvs $
+ Lam cback $
+ mkCoerceI (mkSymCoI co) $
+ mkApps (Var bindIOId)
+ [ Type stable_ptr_ty
+ , Type res_ty
+ , mkApps (Var newStablePtrId) [ Type arg_ty, Var cback ]
+ , Lam stbl_value ccall_adj
+ ]
+
+ fed = (id `setInlinePragma` NeverActive, io_app)
+ -- Never inline the f.e.d. function, because the litlit
+ -- might not be in scope in other modules.
+
+ return ([fed], h_code, c_code)
where
- ty = idType id
- (tvs,sans_foralls) = tcSplitForAllTys ty
- ([arg_ty], fn_res_ty) = tcSplitFunTys sans_foralls
+ ty = idType id
+ (tvs,sans_foralls) = tcSplitForAllTys ty
+ ([arg_ty], fn_res_ty) = tcSplitFunTys sans_foralls
Just (io_tc, res_ty, co) = tcSplitIOType_maybe fn_res_ty
-- Must have an IO type; hence Just
-- co : fn_res_ty ~ IO res_ty
projects / ghc-hetmet.git / commitdiff