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use super::*;
#[doc(hidden)]
#[macro_export]
macro_rules! com_call {
($vtbl:ty, $this:ident.$method:ident($($args:tt)*)) => {
((&**($this.as_raw() as *mut *mut $vtbl)).$method)($this.as_raw(), $($args)*)
}
}
#[repr(transparent)]
pub struct ComPtr(core::ptr::NonNull<core::ffi::c_void>);
impl ComPtr {
pub fn as_raw(&self) -> *mut core::ffi::c_void {
unsafe { core::mem::transmute_copy(self) }
}
pub fn cast(&self, iid: &GUID) -> Option<Self> {
let mut result = None;
unsafe {
com_call!(
IUnknown_Vtbl,
self.QueryInterface(iid, &mut result as *mut _ as _)
);
}
result
}
}
impl PartialEq for ComPtr {
fn eq(&self, other: &Self) -> bool {
self.cast(&IID_IUnknown).unwrap().0 == other.cast(&IID_IUnknown).unwrap().0
}
}
impl Eq for ComPtr {}
impl Clone for ComPtr {
fn clone(&self) -> Self {
unsafe {
com_call!(IUnknown_Vtbl, self.AddRef());
}
Self(self.0)
}
}
impl Drop for ComPtr {
fn drop(&mut self) {
unsafe {
com_call!(IUnknown_Vtbl, self.Release());
}
}
}