From: Samuel Just <sam.just@inktank.com>
Date: Tue, 21 May 2013 19:47:05 +0000 (-0700)
Subject: common/shared_cache.hpp: add clear()
X-Git-Tag: v0.65~194^2~10
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=12eff5d9ff46617f0067a1c57e2b61fc43afb3bb;p=ceph.git

common/shared_cache.hpp: add clear()

Clear clears a key/value from the cache.

Signed-off-by: Samuel Just <sam.just@inktank.com>
---

diff --git a/src/common/shared_cache.hpp b/src/common/shared_cache.hpp
index 69a4c06dfbf5..50da23a4f2fd 100644
--- a/src/common/shared_cache.hpp
+++ b/src/common/shared_cache.hpp
@@ -85,6 +85,17 @@ public:
     assert(weak_refs.empty());
   }
 
+  void clear(K key) {
+    VPtr val; // release any ref we have after we drop the lock
+    {
+      Mutex::Locker l(lock);
+      if (weak_refs.count(key)) {
+	val = weak_refs[key].lock();
+      }
+      lru_remove(key);
+    }
+  }
+
   void set_size(size_t new_size) {
     list<VPtr> to_release;
     {