From 37c619714bf04d6d22c6fde4beccfce86f4ff82d Mon Sep 17 00:00:00 2001
From: Greg Nisbet <gregorynisbet@fb.com>
Date: Thu, 24 Aug 2017 17:53:08 -0700
Subject: [PATCH] add public kSlotSize to IndexedMemPool

Summary:
add public kSlotSize to IndexedMemPool,
needed to support getting the approximate memory footprint of the pool
(since a Slot has two atomic uint32_t's more than a bare Elem)

Reviewed By: yfeldblum

Differential Revision: D5690225

fbshipit-source-id: 667da6b67b339038b92b0e5acde17219fe1c85c5
---
 folly/IndexedMemPool.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/folly/IndexedMemPool.h b/folly/IndexedMemPool.h
index 6b3fa53a..899a99e1 100644
--- a/folly/IndexedMemPool.h
+++ b/folly/IndexedMemPool.h
@@ -506,6 +506,9 @@ struct IndexedMemPool : boost::noncopyable {
   void markAllocated(Slot& slot) {
     slot.localNext.store(uint32_t(-1), std::memory_order_release);
   }
+
+ public:
+  static constexpr std::size_t kSlotSize = sizeof(Slot);
 };
 
 namespace detail {
-- 
2.34.1