From 100861cb2a40c226c9a69c52c12805932149366f Mon Sep 17 00:00:00 2001
From: Andrea Bocci <andrea.bocci@cern.ch>
Date: Thu, 16 Oct 2025 11:06:24 +0200
Subject: [PATCH] Add a constructor for code that does not use alpaka
 explicitly

---
 DataFormats/Portable/interface/PortableHostCollection.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/DataFormats/Portable/interface/PortableHostCollection.h b/DataFormats/Portable/interface/PortableHostCollection.h
index a590f8e34470c..54264969d272c 100644
--- a/DataFormats/Portable/interface/PortableHostCollection.h
+++ b/DataFormats/Portable/interface/PortableHostCollection.h
@@ -47,6 +47,9 @@ class PortableHostCollection {
     assert(reinterpret_cast<uintptr_t>(buffer_->data()) % Layout::alignment == 0);
   }
 
+  // constructor for code that does not use alpaka explicitly, using the global "host" object returned by cms::alpakatools::host()
+  PortableHostCollection(int32_t elements) : PortableHostCollection(elements, cms::alpakatools::host()) {}
+
   // non-copyable
   PortableHostCollection(PortableHostCollection const&) = delete;
   PortableHostCollection& operator=(PortableHostCollection const&) = delete;