1 files changed, 33 insertions, 0 deletions
diff --git a/vendor/fd-lock/src/sys/windows/utils.rs b/vendor/fd-lock/src/sys/windows/utils.rs
new file mode 100644
index 000000000..43656a083
--- /dev/null
+++ b/vendor/fd-lock/src/sys/windows/utils.rs
@@ -0,0 +1,33 @@
+use std::io;
+use std::mem;
+
+use windows_sys::Win32::Foundation::BOOL;
+use windows_sys::Win32::System::IO::OVERLAPPED;
+
+/// A wrapper around `OVERLAPPED` to provide "rustic" accessors and
+/// initializers.
+pub(crate) struct Overlapped(OVERLAPPED);
+
+impl Overlapped {
+    /// Creates a new zeroed out instance of an overlapped I/O tracking state.
+    ///
+    /// This is suitable for passing to methods which will then later get
+    /// notified via an I/O Completion Port.
+    pub(crate) fn zero() -> Overlapped {
+        Overlapped(unsafe { mem::zeroed() })
+    }
+
+    /// Gain access to the raw underlying data
+    pub(crate) fn raw(&self) -> *mut OVERLAPPED {
+        &self.0 as *const _ as *mut _
+    }
+}
+
+/// Convert a system call which returns a `BOOL` to an `io::Result`.
+pub(crate) fn syscall(status: BOOL) -> std::io::Result<()> {
+    if status == 0 {
+        Err(io::Error::last_os_error())
+    } else {
+        Ok(())
+    }
+}