Prefer optional over convertible parameters

crates/libs/bindgen/src/type_name.rs

@@ -43,6 +43,7 @@ impl TypeName {
     pub const HRESULT: Self = Self("Windows.Win32.Foundation", "HRESULT");
     pub const CHAR: Self = Self("Windows.Win32.Foundation", "CHAR");
     pub const BOOL: Self = Self("Windows.Win32.Foundation", "BOOL");
+    pub const BOOLEAN: Self = Self("Windows.Win32.Foundation", "BOOLEAN");
     pub const NTSTATUS: Self = Self("Windows.Win32.Foundation", "NTSTATUS");
     pub const WIN32_ERROR: Self = Self("Windows.Win32.Foundation", "WIN32_ERROR");
     pub const RPC_STATUS: Self = Self("Windows.Win32.System.Rpc", "RPC_STATUS");

crates/libs/bindgen/src/types/cpp_method.rs

@@ -29,7 +29,7 @@ pub enum ParamHint {
     ArrayRelativeByteLen(usize),
     ArrayRelativePtr(usize),
     IntoParam,
-    OptionalPointer,
+    Optional,
     ValueType,
     Blittable,
 }
@@ -159,13 +159,13 @@ impl CppMethod {
                     *hint = ParamHint::IntoParam;
                 } else {
                     let flags = signature.params[position].1.flags();
-                    if signature.params[position].0.is_pointer()
+                    if signature.params[position].0.is_copyable()
                         && (flags.contains(ParamAttributes::Optional)
                             || signature.params[position]
                                 .1
                                 .has_attribute("ReservedAttribute"))
                     {
-                        *hint = ParamHint::OptionalPointer;
+                        *hint = ParamHint::Optional;
                     } else if signature.params[position].0.is_primitive()
                         && (!signature.params[position].0.is_pointer()
                             || signature.params[position].0.deref().is_copyable())
@@ -622,7 +622,7 @@ impl CppMethod {
                     let kind: TokenStream = format!("P{position}").into();
                     tokens.combine(&quote! { #name: #kind, });
                 }
-                ParamHint::OptionalPointer => {
+                ParamHint::Optional => {
                     let kind = ty.write_default(writer);
                     tokens.combine(&quote! { #name: Option<#kind>, });
                 }
@@ -688,12 +688,8 @@ impl CppMethod {
                         ParamHint::IntoParam => {
                             quote! { #name.param().abi(), }
                         }
-                        ParamHint::OptionalPointer => {
-                            if flags.contains(ParamAttributes::Out) {
-                                quote! { core::mem::transmute(#name.unwrap_or(core::ptr::null_mut())), }
-                            } else {
-                                quote! { core::mem::transmute(#name.unwrap_or(core::ptr::null())), }
-                            }
+                        ParamHint::Optional => {
+                            quote! { core::mem::transmute(#name.unwrap_or(core::mem::zeroed())), }
                         }
                         ParamHint::ValueType => {
                             quote! { core::mem::transmute(#name), }
@@ -784,9 +780,7 @@ fn write_invoke_arg(ty: &Type, param: Param, _hint: ParamHint) -> TokenStream {
 }
 
 fn is_convertible(ty: &Type, param: Param, hint: ParamHint) -> bool {
-    !param.flags().contains(ParamAttributes::Out)
-        && !hint.is_array()
-        && (ty.is_convertible() || ty.is_handle())
+    !param.flags().contains(ParamAttributes::Out) && !hint.is_array() && ty.is_convertible()
 }
 
 fn is_retval(signature: &Signature, param_hints: &[ParamHint]) -> bool {

crates/libs/bindgen/src/types/cpp_struct.rs

@@ -260,7 +260,7 @@ impl CppStruct {
     }
 
     pub fn is_convertible(&self) -> bool {
-        self.is_handle()
+        matches!(self.def.type_name(), TypeName::BOOL | TypeName::BOOLEAN)
     }
 
     pub fn is_copyable(&self) -> bool {

crates/libs/bindgen/src/types/mod.rs

@@ -795,14 +795,6 @@ impl Type {
         }
     }
 
-    pub fn is_handle(&self) -> bool {
-        if let Self::CppStruct(ty) = self {
-            ty.is_handle()
-        } else {
-            false
-        }
-    }
-
     pub fn is_void(&self) -> bool {
         match self {
             Type::PtrConst(ty, _) | Type::PtrMut(ty, _) => ty.is_void(),

crates/libs/windows/src/Windows/Wdk/Devices/HumanInterfaceDevice/mod.rs

@@ -1,10 +1,7 @@
 #[inline]
-pub unsafe fn VhfAsyncOperationComplete<P1>(vhfoperationhandle: *const core::ffi::c_void, completionstatus: P1) -> super::super::super::Win32::Foundation::NTSTATUS
-where
-    P1: windows_core::Param<super::super::super::Win32::Foundation::NTSTATUS>,
-{
+pub unsafe fn VhfAsyncOperationComplete(vhfoperationhandle: *const core::ffi::c_void, completionstatus: super::super::super::Win32::Foundation::NTSTATUS) -> super::super::super::Win32::Foundation::NTSTATUS {
     windows_targets::link!("vhfum.dll" "system" fn VhfAsyncOperationComplete(vhfoperationhandle : *const core::ffi::c_void, completionstatus : super::super::super::Win32::Foundation:: NTSTATUS) -> super::super::super::Win32::Foundation:: NTSTATUS);
-    VhfAsyncOperationComplete(core::mem::transmute(vhfoperationhandle), completionstatus.param().abi())
+    VhfAsyncOperationComplete(core::mem::transmute(vhfoperationhandle), core::mem::transmute(completionstatus))
 }
 #[inline]
 pub unsafe fn VhfCreate(vhfconfig: *const VHF_CONFIG, vhfhandle: *mut *mut core::ffi::c_void) -> super::super::super::Win32::Foundation::NTSTATUS {

crates/libs/windows/src/Windows/Wdk/Foundation/mod.rs

@@ -1,18 +1,12 @@
 #[inline]
-pub unsafe fn NtClose<P0>(handle: P0) -> super::super::Win32::Foundation::NTSTATUS
-where
-    P0: windows_core::Param<super::super::Win32::Foundation::HANDLE>,
-{
+pub unsafe fn NtClose(handle: super::super::Win32::Foundation::HANDLE) -> super::super::Win32::Foundation::NTSTATUS {
     windows_targets::link!("ntdll.dll" "system" fn NtClose(handle : super::super::Win32::Foundation:: HANDLE) -> super::super::Win32::Foundation:: NTSTATUS);
-    NtClose(handle.param().abi())
+    NtClose(core::mem::transmute(handle))
 }
 #[inline]
-pub unsafe fn NtQueryObject<P0>(handle: P0, objectinformationclass: OBJECT_INFORMATION_CLASS, objectinformation: Option<*mut core::ffi::c_void>, objectinformationlength: u32, returnlength: Option<*mut u32>) -> super::super::Win32::Foundation::NTSTATUS
-where
-    P0: windows_core::Param<super::super::Win32::Foundation::HANDLE>,
-{
+pub unsafe fn NtQueryObject(handle: Option<super::super::Win32::Foundation::HANDLE>, objectinformationclass: OBJECT_INFORMATION_CLASS, objectinformation: Option<*mut core::ffi::c_void>, objectinformationlength: u32, returnlength: Option<*mut u32>) -> super::super::Win32::Foundation::NTSTATUS {
     windows_targets::link!("ntdll.dll" "system" fn NtQueryObject(handle : super::super::Win32::Foundation:: HANDLE, objectinformationclass : OBJECT_INFORMATION_CLASS, objectinformation : *mut core::ffi::c_void, objectinformationlength : u32, returnlength : *mut u32) -> super::super::Win32::Foundation:: NTSTATUS);
-    NtQueryObject(handle.param().abi(), core::mem::transmute(objectinformationclass), core::mem::transmute(objectinformation.unwrap_or(core::ptr::null_mut())), core::mem::transmute(objectinformationlength), core::mem::transmute(returnlength.unwrap_or(core::ptr::null_mut())))
+    NtQueryObject(core::mem::transmute(handle.unwrap_or(core::mem::zeroed())), core::mem::transmute(objectinformationclass), core::mem::transmute(objectinformation.unwrap_or(core::mem::zeroed())), core::mem::transmute(objectinformationlength), core::mem::transmute(returnlength.unwrap_or(core::mem::zeroed())))
 }
 #[repr(C)]
 #[cfg(all(feature = "Wdk_System_SystemServices", feature = "Win32_Security"))]

crates/libs/windows/src/Windows/Wdk/Graphics/Direct3D/mod.rs

@@ -332,12 +332,9 @@ pub unsafe fn D3DKMTGetProcessDeviceRemovalSupport(param0: *mut D3DKMT_GETPROCES
     D3DKMTGetProcessDeviceRemovalSupport(core::mem::transmute(param0))
 }
 #[inline]
-pub unsafe fn D3DKMTGetProcessSchedulingPriorityClass<P0>(param0: P0, param1: *mut D3DKMT_SCHEDULINGPRIORITYCLASS) -> super::super::super::Win32::Foundation::NTSTATUS
-where
-    P0: windows_core::Param<super::super::super::Win32::Foundation::HANDLE>,
-{
+pub unsafe fn D3DKMTGetProcessSchedulingPriorityClass(param0: super::super::super::Win32::Foundation::HANDLE, param1: *mut D3DKMT_SCHEDULINGPRIORITYCLASS) -> super::super::super::Win32::Foundation::NTSTATUS {
     windows_targets::link!("gdi32.dll" "system" fn D3DKMTGetProcessSchedulingPriorityClass(param0 : super::super::super::Win32::Foundation:: HANDLE, param1 : *mut D3DKMT_SCHEDULINGPRIORITYCLASS) -> super::super::super::Win32::Foundation:: NTSTATUS);
-    D3DKMTGetProcessSchedulingPriorityClass(param0.param().abi(), core::mem::transmute(param1))
+    D3DKMTGetProcessSchedulingPriorityClass(core::mem::transmute(param0), core::mem::transmute(param1))
 }
 #[inline]
 pub unsafe fn D3DKMTGetResourcePresentPrivateDriverData(param0: *mut D3DDDI_GETRESOURCEPRESENTPRIVATEDRIVERDATA) -> super::super::super::Win32::Foundation::NTSTATUS {
@@ -643,12 +640,9 @@ pub unsafe fn D3DKMTReleaseKeyedMutex2(param0: *mut D3DKMT_RELEASEKEYEDMUTEX2) -
     D3DKMTReleaseKeyedMutex2(core::mem::transmute(param0))
 }
 #[inline]
-pub unsafe fn D3DKMTReleaseProcessVidPnSourceOwners<P0>(param0: P0) -> super::super::super::Win32::Foundation::NTSTATUS
-where
-    P0: windows_core::Param<super::super::super::Win32::Foundation::HANDLE>,
-{
+pub unsafe fn D3DKMTReleaseProcessVidPnSourceOwners(param0: super::super::super::Win32::Foundation::HANDLE) -> super::super::super::Win32::Foundation::NTSTATUS {
     windows_targets::link!("gdi32.dll" "system" fn D3DKMTReleaseProcessVidPnSourceOwners(param0 : super::super::super::Win32::Foundation:: HANDLE) -> super::super::super::Win32::Foundation:: NTSTATUS);
-    D3DKMTReleaseProcessVidPnSourceOwners(param0.param().abi())
+    D3DKMTReleaseProcessVidPnSourceOwners(core::mem::transmute(param0))
 }
 #[inline]
 pub unsafe fn D3DKMTRender(param0: *mut D3DKMT_RENDER) -> super::super::super::Win32::Foundation::NTSTATUS {
@@ -706,12 +700,9 @@ pub unsafe fn D3DKMTSetMonitorColorSpaceTransform(param0: *const D3DKMT_SET_COLO
     D3DKMTSetMonitorColorSpaceTransform(core::mem::transmute(param0))
 }
 #[inline]
-pub unsafe fn D3DKMTSetProcessSchedulingPriorityClass<P0>(param0: P0, param1: D3DKMT_SCHEDULINGPRIORITYCLASS) -> super::super::super::Win32::Foundation::NTSTATUS
-where
-    P0: windows_core::Param<super::super::super::Win32::Foundation::HANDLE>,
-{
+pub unsafe fn D3DKMTSetProcessSchedulingPriorityClass(param0: super::super::super::Win32::Foundation::HANDLE, param1: D3DKMT_SCHEDULINGPRIORITYCLASS) -> super::super::super::Win32::Foundation::NTSTATUS {
     windows_targets::link!("gdi32.dll" "system" fn D3DKMTSetProcessSchedulingPriorityClass(param0 : super::super::super::Win32::Foundation:: HANDLE, param1 : D3DKMT_SCHEDULINGPRIORITYCLASS) -> super::super::super::Win32::Foundation:: NTSTATUS);
-    D3DKMTSetProcessSchedulingPriorityClass(param0.param().abi(), core::mem::transmute(param1))
+    D3DKMTSetProcessSchedulingPriorityClass(core::mem::transmute(param0), core::mem::transmute(param1))
 }
 #[inline]
 pub unsafe fn D3DKMTSetQueuedLimit(param0: *const D3DKMT_SETQUEUEDLIMIT) -> super::super::super::Win32::Foundation::NTSTATUS {