From 13b37dab614b7a6f93c223f803e59edebff4bbb9 Mon Sep 17 00:00:00 2001
From: greg <greg7mdp@gmail.com>
Date: Mon, 1 Feb 2021 08:45:37 -0500
Subject: [PATCH] Add clearSubmap API and make sets_ array protected - issue
 #81

---
 parallel_hashmap/phmap.h | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/parallel_hashmap/phmap.h b/parallel_hashmap/phmap.h
index b2176a2..458abc0 100644
--- a/parallel_hashmap/phmap.h
+++ b/parallel_hashmap/phmap.h
@@ -2747,7 +2747,18 @@ public:
 
     PHMAP_ATTRIBUTE_REINITIALIZES void clear() {
         for (auto& inner : sets_)
+        {
+            typename Lockable::UniqueLock m(inner);
             inner.set_.clear();
+        }
+    }
+
+    // extension - clears only soecified submap
+    // ----------------------------------------
+    void clearSubmap(std::size_t submap_index) {
+        Inner& inner = sets_[submap_index];
+        typename Lockable::UniqueLock m(inner);
+        inner.set_.clear();
     }
 
     // This overload kicks in when the argument is an rvalue of insertable and
@@ -3343,6 +3354,7 @@ private:
         return sets_[0].set_.alloc_ref();
     }
 
+protected:       // protected in case users want to derive fromm this
     std::array<Inner, num_tables> sets_;
 };