initial code repo

[stor4nfv.git] / src / ceph / src / mds / LocalLock.h

diff --git a/src/ceph/src/mds/LocalLock.h b/src/ceph/src/mds/LocalLock.h
new file mode 100644 (file)
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+++ b/src/ceph/src/mds/LocalLock.h
@@ -0,0 +1,65 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*- 
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software 
+ * Foundation.  See file COPYING.
+ * 
+ */
+
+
+#ifndef CEPH_LOCALLOCK_H
+#define CEPH_LOCALLOCK_H
+
+#include "SimpleLock.h"
+
+class LocalLock : public SimpleLock {
+public:
+  client_t last_wrlock_client;
+  
+  LocalLock(MDSCacheObject *o, LockType *t) : 
+    SimpleLock(o, t) {
+    set_state(LOCK_LOCK); // always.
+  }
+
+  bool is_locallock() const override {
+    return true;
+  }
+
+  bool can_xlock_local() const {
+    return !is_wrlocked() && (get_xlock_by() == MutationRef());
+  }
+
+  bool can_wrlock() const {
+    return !is_xlocked();
+  }
+  void get_wrlock(client_t client) {
+    assert(can_wrlock());
+    SimpleLock::get_wrlock();
+    last_wrlock_client = client;
+  }
+  void put_wrlock() {
+    SimpleLock::put_wrlock();
+    if (get_num_wrlocks() == 0)
+      last_wrlock_client = client_t();
+  }
+  client_t get_last_wrlock_client() const {
+    return last_wrlock_client;
+  }
+  
+  void print(ostream& out) const override {
+    out << "(";
+    _print(out);
+    if (last_wrlock_client >= 0)
+      out << " last_client=" << last_wrlock_client;
+    out << ")";
+  }
+};
+
+
+#endif