import DsCCall ( dsCCall, mkFCall, boxResult, unboxArg, resultWrapper )
import DsMonad
-import HsSyn ( ForeignDecl(..), FoExport(..), FoImport(..) )
+import HsSyn ( ForeignDecl(..), ForeignExport(..),
+ ForeignImport(..), CImportSpec(..) )
import TcHsSyn ( TypecheckedForeignDecl )
import CoreUtils ( exprType, mkInlineMe )
import Id ( Id, idType, idName, mkVanillaGlobal, mkSysLocal,
setInlinePragma )
-import IdInfo ( neverInlinePrag, vanillaIdInfo )
+import IdInfo ( vanillaIdInfo )
import Literal ( Literal(..) )
import Module ( Module, moduleUserString )
import Name ( mkGlobalName, nameModule, nameOccName, getOccString,
mkForeignExportOcc, isLocalName,
NamedThing(..),
)
-
- -- Import Type not TcType; in this module we are generating code
- -- to marshal representation types across to C
-import Type ( splitTyConApp_maybe, funResultTy,
- splitFunTys, splitForAllTys, splitAppTy,
- Type, mkFunTys, mkForAllTys, mkTyConApp,
- mkFunTy, applyTy, eqType, repType
- )
-import TcType ( tcSplitForAllTys, tcSplitFunTys,
+import Type ( repType, eqType )
+import TcType ( Type, mkFunTys, mkForAllTys, mkTyConApp,
+ mkFunTy, applyTy,
+ tcSplitForAllTys, tcSplitFunTys, tcTyConAppArgs,
tcSplitTyConApp_maybe, tcSplitAppTy,
tcFunResultTy
)
import ForeignCall ( ForeignCall(..), CCallSpec(..),
Safety(..), playSafe,
CExportSpec(..),
- CCallConv(..), ccallConvToInt
+ CCallConv(..), ccallConvToInt,
+ ccallConvAttribute
)
import CStrings ( CLabelString )
import TysWiredIn ( addrTy, unitTy, stablePtrTyCon )
import PrelNames ( hasKey, ioTyConKey, deRefStablePtrName, newStablePtrName,
bindIOName, returnIOName
)
+import BasicTypes ( Activation( NeverActive ) )
+import ErrUtils ( addShortWarnLocLine )
import Outputable
-
import Maybe ( fromJust )
\end{code}
-- "foreign exported" functions.
, SDoc -- C stubs to use when calling
-- "foreign exported" functions.
+ , [FAST_STRING] -- headers that need to be included
+ -- into C code generated for this module
)
dsForeigns mod_name fos
- = foldlDs combine ([], [], empty, empty) fos
+ = foldlDs combine ([], [], empty, empty, []) fos
where
- combine (acc_feb, acc_f, acc_h, acc_c) (ForeignImport id _ spec _)
- = dsFImport mod_name id spec `thenDs` \ (bs, h, c) ->
- returnDs (acc_feb, bs ++ acc_f, h $$ acc_h, c $$ acc_c)
-
- combine (acc_feb, acc_f, acc_h, acc_c) (ForeignExport id _ (CExport (CExportStatic ext_nm cconv)) _)
- = dsFExport mod_name id (idType id) ext_nm cconv False `thenDs` \ (feb, b, h, c) ->
- returnDs (feb:acc_feb, b : acc_f, h $$ acc_h, c $$ acc_c)
+ combine (acc_feb, acc_f, acc_h, acc_c, acc_header)
+ (ForeignImport id _ spec depr loc)
+ = dsFImport mod_name id spec `thenDs` \(bs, h, c, hd) ->
+ warnDepr depr loc `thenDs` \_ ->
+ returnDs (acc_feb, bs ++ acc_f, h $$ acc_h, c $$ acc_c, hd ++ acc_header)
+
+ combine (acc_feb, acc_f, acc_h, acc_c, acc_header)
+ (ForeignExport id _ (CExport (CExportStatic ext_nm cconv)) depr loc)
+ = dsFExport mod_name id (idType id)
+ ext_nm cconv False `thenDs` \(feb, b, h, c) ->
+ warnDepr depr loc `thenDs` \_ ->
+ returnDs (feb:acc_feb, b : acc_f, h $$ acc_h, c $$ acc_c, acc_header)
+
+ warnDepr False _ = returnDs ()
+ warnDepr True loc = dsWarn (addShortWarnLocLine loc msg)
+ where
+ msg = ptext SLIT("foreign declaration uses deprecated non-standard syntax")
\end{code}
The strictness/CPR analyser won't do this automatically because it doesn't look
inside returned tuples; but inlining this wrapper is a Really Good Idea
because it exposes the boxing to the call site.
-
\begin{code}
dsFImport :: Module
-> Id
- -> FoImport
+ -> ForeignImport
+ -> DsM ([Binding], SDoc, SDoc, [FAST_STRING])
+dsFImport modName id (CImport cconv safety header lib spec)
+ = dsCImport modName id spec cconv safety `thenDs` \(ids, h, c) ->
+ returnDs (ids, h, c, if _NULL_ header then [] else [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 `_NULL_ lib', the value was not given
+dsFImport modName id (DNImport spec)
+ = dsFCall modName id (DNCall spec) `thenDs` \(ids, h, c) ->
+ returnDs (ids, h, c, [])
+
+dsCImport :: Module
+ -> Id
+ -> CImportSpec
+ -> CCallConv
+ -> Safety
-> DsM ([Binding], SDoc, SDoc)
-dsFImport mod_name lbl_id (LblImport ext_nm)
- = ASSERT(fromJust res_ty `eqType` addrPrimTy) -- typechecker ensures this
- returnDs ([(lbl_id, rhs)], empty, empty)
+dsCImport modName id (CLabel cid) _ _
+ = ASSERT(fromJust resTy `eqType` addrPrimTy) -- typechecker ensures this
+ returnDs ([(id, rhs)], empty, empty)
where
- (res_ty, fo_rhs) = resultWrapper (idType lbl_id)
- rhs = fo_rhs (mkLit (MachLabel ext_nm))
-
-dsFImport mod_name fn_id (CImport spec) = dsFCall mod_name fn_id (CCall spec)
-dsFImport mod_name fn_id (DNImport spec) = dsFCall mod_name fn_id (DNCall spec)
-dsFImport mod_name fn_id (CDynImport cconv) = dsFExportDynamic mod_name fn_id cconv
+ (resTy, foRhs) = resultWrapper (idType id)
+ rhs = foRhs (mkLit (MachLabel cid))
+dsCImport modName id (CFunction target) cconv safety
+ = dsFCall modName id (CCall (CCallSpec target cconv safety))
+dsCImport modName id CWrapper cconv _
+ = dsFExportDynamic modName id cconv
\end{code}
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) ->
-- If it's IO t, return (\x.x, IO t, t)
-- If it's plain t, return (\x.returnIO x, IO t, t)
(case tcSplitTyConApp_maybe orig_res_ty of
+ -- We must use tcSplit here so that we see the (IO t) in
+ -- the type. [IO t is transparent to plain splitTyConApp.]
+
Just (ioTyCon, [res_ty])
-> ASSERT( ioTyCon `hasKey` ioTyConKey )
-- The function already returns IO t
where
(tvs,sans_foralls) = tcSplitForAllTys ty
(fe_arg_tys', orig_res_ty) = tcSplitFunTys sans_foralls
-
- (_, stbl_ptr_ty') = tcSplitForAllTys stbl_ptr_ty
- (_, stbl_ptr_to_ty) = tcSplitAppTy stbl_ptr_ty'
+ -- 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'
stbl_ptr_ty | isDyn = head fe_arg_tys'
| otherwise = error "stbl_ptr_ty"
+
+ (_, stbl_ptr_ty') = tcSplitForAllTys stbl_ptr_ty
+ (_, stbl_ptr_to_ty) = tcSplitAppTy stbl_ptr_ty'
+ -- Again, stable pointers are just newtypes,
+ -- so we must see them! Hence tcSplit*
\end{code}
@foreign export dynamic@ lets you dress up Haskell IO actions
io_app = mkLams tvs $
mkLams [cback] $
stbl_app ccall_io_adj res_ty
- fed = (id `setInlinePragma` neverInlinePrag, io_app)
+ 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, fe], h_code, c_code)
where
- ty = idType id
- (tvs,sans_foralls) = tcSplitForAllTys ty
- ([arg_ty], io_res_ty) = tcSplitFunTys sans_foralls
- Just (ioTyCon, [res_ty]) = tcSplitTyConApp_maybe io_res_ty
- export_ty = mkFunTy (mkTyConApp stablePtrTyCon [arg_ty]) arg_ty
+ ty = idType id
+ (tvs,sans_foralls) = tcSplitForAllTys ty
+ ([arg_ty], io_res_ty) = tcSplitFunTys sans_foralls
+ [res_ty] = tcTyConAppArgs io_res_ty
+ -- Must use tcSplit* to see the (IO t), which is a newtype
+ export_ty = mkFunTy (mkTyConApp stablePtrTyCon [arg_ty]) arg_ty
toCName :: Id -> String
toCName i = showSDoc (pprCode CStyle (ppr (idName i)))
cParamTypes = map showStgType real_args
- res_ty_is_unit = res_ty `eqType` unitTy
+ res_ty_is_unit = res_ty `eqType` unitTy -- Look through any newtypes
cResType | res_ty_is_unit = text "void"
| otherwise = showStgType res_ty
pprCconv = case cc of
CCallConv -> empty
- StdCallConv -> ppr cc
+ StdCallConv -> text (ccallConvAttribute cc)
declareResult = text "HaskellObj ret;"
showFFIType :: Type -> String
showFFIType t = getOccString (getName tc)
where
- tc = case splitTyConApp_maybe (repType t) of
+ tc = case tcSplitTyConApp_maybe (repType t) of
Just (tc,_) -> tc
Nothing -> pprPanic "showFFIType" (ppr t)
\end{code}
projects / ghc-hetmet.git / blobdiff