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