From: Greg Nisbet <gregorynisbet@fb.com>
Date: Fri, 25 Aug 2017 00:53:08 +0000 (-0700)
Subject: add public kSlotSize to IndexedMemPool
X-Git-Tag: v2017.08.28.00~5
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=37c619714bf04d6d22c6fde4beccfce86f4ff82d;p=folly.git

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
---

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 {