mirror of
https://github.com/ceph/ceph
synced 2025-02-08 19:38:47 +00:00
dc48f25847
git-svn-id: https://ceph.svn.sf.net/svnroot/ceph@2100 29311d96-e01e-0410-9327-a35deaab8ce9
62 lines
1.3 KiB
C++
62 lines
1.3 KiB
C++
// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
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// vim: ts=8 sw=2 smarttab
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/*
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* Ceph - scalable distributed file system
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*
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* Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
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*
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* This is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License version 2.1, as published by the Free Software
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* Foundation. See file COPYING.
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*
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*/
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#ifndef __LOCALLOCK_H
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#define __LOCALLOCK_H
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#include "SimpleLock.h"
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class LocalLock : public SimpleLock {
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protected:
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int num_wrlock;
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public:
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LocalLock(MDSCacheObject *o, int t, int wo) :
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SimpleLock(o, t, wo),
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num_wrlock(0) {
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set_state(LOCK_LOCK); // always.
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}
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bool can_wrlock() {
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return !is_xlocked();
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}
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void get_wrlock() {
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assert(can_wrlock());
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if (num_wrlock == 0) parent->get(MDSCacheObject::PIN_LOCK);
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++num_wrlock;
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}
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void put_wrlock() {
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--num_wrlock;
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if (num_wrlock == 0) parent->put(MDSCacheObject::PIN_LOCK);
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}
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bool is_wrlocked() { return num_wrlock > 0; }
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int get_num_wrlocks() { return num_wrlock; }
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void print(ostream& out) {
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out << "(";
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out << get_lock_type_name(get_type());
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if (is_xlocked())
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out << " x=" << get_xlocked_by();
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if (is_wrlocked())
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out << " wr=" << get_num_wrlocks();
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out << ")";
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}
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};
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#endif
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