From 2cf18d3189ca7cdac1ddbf73b5fc5aa3322a9f21 Mon Sep 17 00:00:00 2001
From: vvshlyaga <vvshlyaga@yandex-team.com>
Date: Thu, 4 Dec 2025 16:01:47 +0300
Subject: YT-25976: fix blocks alignment in io requests
 commit_hash:785d73458fcb036340236b123b33a6f3b0b1c1ce

---
 library/cpp/yt/memory/ref.cpp | 45 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 45 insertions(+)

(limited to 'library/cpp/yt/memory/ref.cpp')

diff --git a/library/cpp/yt/memory/ref.cpp b/library/cpp/yt/memory/ref.cpp
index fc153bb02e3..5a6ca1e3373 100644
--- a/library/cpp/yt/memory/ref.cpp
+++ b/library/cpp/yt/memory/ref.cpp
@@ -171,6 +171,44 @@ public:
 
 ////////////////////////////////////////////////////////////////////////////////
 
+class TCustomAlignedAllocationHolder
+    : public TAllocationHolderBase<TCustomAlignedAllocationHolder>
+{
+public:
+    TCustomAlignedAllocationHolder(
+        size_t size,
+        size_t alignment,
+        TSharedMutableRefAllocateOptions options,
+        TRefCountedTypeCookie cookie)
+        : Begin_(static_cast<char*>(::aligned_malloc(size, alignment)))
+        , Alignment_(alignment)
+    {
+        Initialize(size, options, cookie);
+    }
+
+    ~TCustomAlignedAllocationHolder()
+    {
+        ::free(Begin_);
+    }
+
+    char* GetBegin()
+    {
+        return Begin_;
+    }
+
+    // TSharedRangeHolder overrides.
+    std::optional<size_t> GetTotalByteSize() const override
+    {
+        return AlignUp(Size_, Alignment_);
+    }
+
+private:
+    char* const Begin_;
+    size_t Alignment_;
+};
+
+////////////////////////////////////////////////////////////////////////////////
+
 class TPageAlignedAllocationHolder
     : public TAllocationHolderBase<TPageAlignedAllocationHolder>
 {
@@ -311,6 +349,13 @@ TSharedMutableRef TSharedMutableRef::AllocatePageAligned(size_t size, TSharedMut
     return TSharedMutableRef(ref, std::move(holder));
 }
 
+TSharedMutableRef TSharedMutableRef::AllocateAligned(size_t size, size_t alignment, TSharedMutableRefAllocateOptions options, TRefCountedTypeCookie tagCookie)
+{
+    auto holder = New<TCustomAlignedAllocationHolder>(size, alignment, options, tagCookie);
+    auto ref = holder->GetRef();
+    return TSharedMutableRef(ref, std::move(holder));
+}
+
 TSharedMutableRef TSharedMutableRef::FromBlob(TBlob&& blob)
 {
     auto ref = TMutableRef::FromBlob(blob);
-- 
cgit v1.3