36 lines
1.0 KiB
Rust
36 lines
1.0 KiB
Rust
//! Handles COM initialization and cleanup.
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use super::check_result;
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use std::ptr;
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use super::winapi::um::objbase::{COINIT_MULTITHREADED};
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use super::winapi::um::combaseapi::{CoInitializeEx, CoUninitialize};
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thread_local!(static COM_INITIALIZED: ComInitialized = {
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unsafe {
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// this call can fail if another library initialized COM in single-threaded mode
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// handling this situation properly would make the API more annoying, so we just don't care
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check_result(CoInitializeEx(ptr::null_mut(), COINIT_MULTITHREADED)).unwrap();
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ComInitialized(ptr::null_mut())
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}
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});
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/// RAII object that guards the fact that COM is initialized.
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///
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// We store a raw pointer because it's the only way at the moment to remove `Send`/`Sync` from the
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// object.
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struct ComInitialized(*mut ());
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impl Drop for ComInitialized {
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#[inline]
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fn drop(&mut self) {
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unsafe { CoUninitialize() };
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}
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}
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/// Ensures that COM is initialized in this thread.
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#[inline]
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pub fn com_initialized() {
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COM_INITIALIZED.with(|_| {});
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}
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