75 lines
1.5 KiB
Go
75 lines
1.5 KiB
Go
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//go:build windows
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package combridge
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import (
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"syscall"
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"unsafe"
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"golang.org/x/sys/windows"
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)
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// IUnknownFromPointer cast a generic pointer into a IUnknownImpl pointer
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func IUnknownFromPointer(ref unsafe.Pointer) *IUnknownImpl {
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return (*IUnknownImpl)(ref)
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}
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// IUnknownFromPointer cast native pointer into a IUnknownImpl pointer
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func IUnknownFromUintptr(ref uintptr) *IUnknownImpl {
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return IUnknownFromPointer(unsafe.Pointer(ref))
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}
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type IUnknownVtbl struct {
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queryInterface uintptr
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addRef uintptr
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release uintptr
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}
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func (i *IUnknownVtbl) QueryInterface(this unsafe.Pointer, refiid *windows.GUID, ppvObject **IUnknownImpl) error {
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r, _, _ := syscall.SyscallN(
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i.queryInterface,
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uintptr(this),
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uintptr(unsafe.Pointer(refiid)),
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uintptr(unsafe.Pointer(ppvObject)),
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)
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if r != uintptr(windows.S_OK) {
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return syscall.Errno(r)
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}
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return nil
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}
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func (i *IUnknownVtbl) AddRef(this unsafe.Pointer) uint32 {
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r, _, _ := syscall.SyscallN(
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i.addRef,
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uintptr(this),
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)
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return uint32(r)
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}
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func (i *IUnknownVtbl) Release(this unsafe.Pointer) uint32 {
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r, _, _ := syscall.SyscallN(
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i.release,
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uintptr(this),
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)
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return uint32(r)
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}
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type IUnknownImpl struct {
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vtbl *IUnknownVtbl
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}
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func (i *IUnknownImpl) QueryInterface(refiid *windows.GUID, ppvObject **IUnknownImpl) error {
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return i.vtbl.QueryInterface(unsafe.Pointer(i), refiid, ppvObject)
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}
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func (i *IUnknownImpl) AddRef() uint32 {
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return i.vtbl.AddRef(unsafe.Pointer(i))
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}
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func (i *IUnknownImpl) Release() uint32 {
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return i.vtbl.Release(unsafe.Pointer(i))
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}
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