Add freeze file times on Windows

library/std/src/os/windows/fs.rs

@@ -305,6 +305,18 @@ pub trait OpenOptionsExt {
     ///     https://docs.microsoft.com/en-us/windows/win32/api/winnt/ne-winnt-security_impersonation_level
     #[stable(feature = "open_options_ext", since = "1.10.0")]
     fn security_qos_flags(&mut self, flags: u32) -> &mut Self;
+
+    /// If set to `true`, prevent the "last access time" of the file from being changed.
+    ///
+    /// Default to `false`.
+    #[unstable(feature = "windows_freeze_file_times", issue = "149715")]
+    fn freeze_last_access_time(&mut self, freeze: bool) -> &mut Self;
+
+    /// If set to `true`, prevent the "last write time" of the file from being changed.
+    ///
+    /// Default to `false`.
+    #[unstable(feature = "windows_freeze_file_times", issue = "149715")]
+    fn freeze_last_write_time(&mut self, freeze: bool) -> &mut Self;
 }
 
 #[stable(feature = "open_options_ext", since = "1.10.0")]
@@ -333,6 +345,16 @@ impl OpenOptionsExt for OpenOptions {
         self.as_inner_mut().security_qos_flags(flags);
         self
     }
+
+    fn freeze_last_access_time(&mut self, freeze: bool) -> &mut Self {
+        self.as_inner_mut().freeze_last_access_time(freeze);
+        self
+    }
+
+    fn freeze_last_write_time(&mut self, freeze: bool) -> &mut Self {
+        self.as_inner_mut().freeze_last_write_time(freeze);
+        self
+    }
 }
 
 /// Windows-specific extensions to [`fs::Metadata`].

library/std/src/sys/fs/windows.rs

@@ -81,6 +81,8 @@ pub struct OpenOptions {
     share_mode: u32,
     security_qos_flags: u32,
     inherit_handle: bool,
+    freeze_last_access_time: bool,
+    freeze_last_write_time: bool,
 }
 
 #[derive(Clone, PartialEq, Eq, Debug)]
@@ -204,6 +206,8 @@ impl OpenOptions {
             attributes: 0,
             security_qos_flags: 0,
             inherit_handle: false,
+            freeze_last_access_time: false,
+            freeze_last_write_time: false,
         }
     }
 
@@ -246,6 +250,12 @@ impl OpenOptions {
     pub fn inherit_handle(&mut self, inherit: bool) {
         self.inherit_handle = inherit;
     }
+    pub fn freeze_last_access_time(&mut self, freeze: bool) {
+        self.freeze_last_access_time = freeze;
+    }
+    pub fn freeze_last_write_time(&mut self, freeze: bool) {
+        self.freeze_last_write_time = freeze;
+    }
 
     fn get_access_mode(&self) -> io::Result<u32> {
         match (self.read, self.write, self.append, self.access_mode) {
@@ -343,6 +353,18 @@ impl File {
         };
         let handle = unsafe { HandleOrInvalid::from_raw_handle(handle) };
         if let Ok(handle) = OwnedHandle::try_from(handle) {
+            if opts.freeze_last_access_time || opts.freeze_last_write_time {
+                let file_time =
+                    c::FILETIME { dwLowDateTime: 0xFFFFFFFF, dwHighDateTime: 0xFFFFFFFF };
+                cvt(unsafe {
+                    c::SetFileTime(
+                        handle.as_raw_handle(),
+                        core::ptr::null(),
+                        if opts.freeze_last_access_time { &file_time } else { core::ptr::null() },
+                        if opts.freeze_last_write_time { &file_time } else { core::ptr::null() },
+                    )
+                })?;
+            }
             // Manual truncation. See #115745.
             if opts.truncate
                 && creation == c::OPEN_ALWAYS