From 1376c5a617be5c25655d0d7cb63e3beaa5a6e026 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:20:39 +0200
Subject: Merging upstream version 1.70.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 vendor/memmap2/src/lib.rs | 59 +++++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 55 insertions(+), 4 deletions(-)

(limited to 'vendor/memmap2/src/lib.rs')

diff --git a/vendor/memmap2/src/lib.rs b/vendor/memmap2/src/lib.rs
index 58df7589b..2d730ae90 100644
--- a/vendor/memmap2/src/lib.rs
+++ b/vendor/memmap2/src/lib.rs
@@ -482,7 +482,7 @@ impl MmapOptions {
             ));
         }
 
-        MmapInner::map_anon(len, self.stack).map(|inner| MmapMut { inner })
+        MmapInner::map_anon(len, self.stack, self.populate).map(|inner| MmapMut { inner })
     }
 
     /// Creates a raw memory map.
@@ -627,7 +627,19 @@ impl Mmap {
     /// See [madvise()](https://man7.org/linux/man-pages/man2/madvise.2.html) map page.
     #[cfg(unix)]
     pub fn advise(&self, advice: Advice) -> Result<()> {
-        self.inner.advise(advice)
+        self.inner.advise(advice, 0, self.inner.len())
+    }
+
+    /// Advise OS how this range of memory map will be accessed.
+    ///
+    /// The offset and length must be in the bounds of the memory map.
+    ///
+    /// Only supported on Unix.
+    ///
+    /// See [madvise()](https://man7.org/linux/man-pages/man2/madvise.2.html) map page.
+    #[cfg(unix)]
+    pub fn advise_range(&self, advice: Advice, offset: usize, len: usize) -> Result<()> {
+        self.inner.advise(advice, offset, len)
     }
 
     /// Lock the whole memory map into RAM. Only supported on Unix.
@@ -806,7 +818,19 @@ impl MmapRaw {
     /// See [madvise()](https://man7.org/linux/man-pages/man2/madvise.2.html) map page.
     #[cfg(unix)]
     pub fn advise(&self, advice: Advice) -> Result<()> {
-        self.inner.advise(advice)
+        self.inner.advise(advice, 0, self.inner.len())
+    }
+
+    /// Advise OS how this range of memory map will be accessed.
+    ///
+    /// The offset and length must be in the bounds of the memory map.
+    ///
+    /// Only supported on Unix.
+    ///
+    /// See [madvise()](https://man7.org/linux/man-pages/man2/madvise.2.html) map page.
+    #[cfg(unix)]
+    pub fn advise_range(&self, advice: Advice, offset: usize, len: usize) -> Result<()> {
+        self.inner.advise(advice, offset, len)
     }
 
     /// Lock the whole memory map into RAM. Only supported on Unix.
@@ -835,6 +859,18 @@ impl fmt::Debug for MmapRaw {
     }
 }
 
+impl From<Mmap> for MmapRaw {
+    fn from(value: Mmap) -> Self {
+        Self { inner: value.inner }
+    }
+}
+
+impl From<MmapMut> for MmapRaw {
+    fn from(value: MmapMut) -> Self {
+        Self { inner: value.inner }
+    }
+}
+
 /// A handle to a mutable memory mapped buffer.
 ///
 /// A file-backed `MmapMut` buffer may be used to read from or write to a file. An anonymous
@@ -1050,7 +1086,19 @@ impl MmapMut {
     /// See [madvise()](https://man7.org/linux/man-pages/man2/madvise.2.html) map page.
     #[cfg(unix)]
     pub fn advise(&self, advice: Advice) -> Result<()> {
-        self.inner.advise(advice)
+        self.inner.advise(advice, 0, self.inner.len())
+    }
+
+    /// Advise OS how this range of memory map will be accessed.
+    ///
+    /// The offset and length must be in the bounds of the memory map.
+    ///
+    /// Only supported on Unix.
+    ///
+    /// See [madvise()](https://man7.org/linux/man-pages/man2/madvise.2.html) map page.
+    #[cfg(unix)]
+    pub fn advise_range(&self, advice: Advice, offset: usize, len: usize) -> Result<()> {
+        self.inner.advise(advice, offset, len)
     }
 
     /// Lock the whole memory map into RAM. Only supported on Unix.
@@ -1633,6 +1681,9 @@ mod test {
         // check that the mmap is empty
         assert_eq!(&zeros[..], &mmap[..]);
 
+        mmap.advise_range(Advice::Sequential, 0, mmap.len())
+            .expect("mmap advising should be supported on unix");
+
         // write values into the mmap
         (&mut mmap[..]).write_all(&incr[..]).unwrap();
 
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