ceph/src/common/mutex_debug.cc

   1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
   2 // vim: ts=8 sw=2 smarttab
   3 /*
   4  * Ceph - scalable distributed file system
   5  *
   6  * Copyright (C) 2004-2006 Sage Weil <sage@newdream.net>
   7  *
   8  * This is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License version 2.1, as published by the Free Software
  11  * Foundation.  See file COPYING.
  12  *
  13  */
  14
  15 #include "common/mutex_debug.h"
  16 #include "common/perf_counters.h"
  17 #include "common/ceph_context.h"
  18 #include "common/config.h"
  19
  20 namespace ceph {
  21 namespace mutex_debug_detail {
  22 enum {
  23   l_mutex_first = 999082,
  24   l_mutex_wait,
  25   l_mutex_last
  26 };
  27
  28 mutex_debugging_base::mutex_debugging_base(std::string group, bool ld, bool bt)
  29   : group(std::move(group)),
  30     lockdep(ld),
  31     backtrace(bt)
  32 {
  33   if (_enable_lockdep()) {
  34     _register();
  35   }
  36 }
  37
  38 mutex_debugging_base::~mutex_debugging_base() {
  39   ceph_assert(nlock == 0);
  40   if (_enable_lockdep()) {
  41     lockdep_unregister(id);
  42   }
  43 }
  44
  45 void mutex_debugging_base::_register() {
  46   id = lockdep_register(group.c_str());
  47 }
  48 void mutex_debugging_base::_will_lock(bool recursive) { // about to lock
  49   id = lockdep_will_lock(group.c_str(), id, backtrace, recursive);
  50 }
  51 void mutex_debugging_base::_locked() {    // just locked
  52   id = lockdep_locked(group.c_str(), id, backtrace);
  53 }
  54 void mutex_debugging_base::_will_unlock() {  // about to unlock
  55   id = lockdep_will_unlock(group.c_str(), id);
  56 }
  57
  58 } // namespace mutex_debug_detail
  59 } // namespace ceph