Add Windows impl

sqlx-pool-guard/src/macos.rs

@@ -0,0 +1,41 @@
+// Copyright 2025 - Nym Technologies SA <contact@nymtech.net>
+// SPDX-License-Identifier: Apache-2.0
+
+use proc_pidinfo::{
+    ProcFDInfo, ProcFDType, VnodeFdInfoWithPath, proc_pidfdinfo_self, proc_pidinfo_list_self,
+};
+
+/// Check if there are no open file descriptors for the given files.
+///
+/// Uses `proc_pidinfo` (`sys/proc_info.h`)
+/// See: http://blog.palominolabs.com/2012/06/19/getting-the-files-being-used-by-a-process-on-mac-os-x/
+pub async fn check_files_closed(file_paths: &[&Path]) -> io::Result<bool> {
+    let fd_list = proc_pidinfo_list_self::<ProcFDInfo>()?;
+
+    for fd in fd_list
+        .iter()
+        .filter(|s| s.fd_type() == Ok(ProcFDType::VNODE))
+    {
+        let Some(vnode) = proc_pidfdinfo_self::<VnodeFdInfoWithPath>(fd.proc_fd)
+            .inspect_err(|e| {
+                log::warn!("proc_pidfdinfo_self::<VnodeFdInfoWithPath>() failure: {e}");
+            })
+            .ok()
+            .flatten()
+        else {
+            continue;
+        };
+
+        if let Ok(true) = vnode
+            .path()
+            .map(|vnode_path| file_paths.contains(&vnode_path))
+            .inspect_err(|e| {
+                log::warn!("vnode.path() failure: {e:?}");
+            })
+        {
+            return Ok(false);
+        }
+    }
+
+    Ok(true)
+}