LCOV - code coverage report
Current view: top level - snaplogger - guard.cpp (source / functions) Hit Total Coverage
Test: coverage.info Lines: 9 9 100.0 %
Date: 2019-08-18 12:59:55 Functions: 2 2 100.0 %
Legend: Lines: hit not hit

          Line data    Source code
       1             : /*
       2             :  * Copyright (c) 2013-2019  Made to Order Software Corp.  All Rights Reserved
       3             :  *
       4             :  * https://snapwebsites.org/project/snaplogger
       5             :  * contact@m2osw.com
       6             :  *
       7             :  * This program is free software; you can redistribute it and/or modify
       8             :  * it under the terms of the GNU General Public License as published by
       9             :  * the Free Software Foundation; either version 2 of the License, or
      10             :  * (at your option) any later version.
      11             :  *
      12             :  * This program is distributed in the hope that it will be useful,
      13             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      14             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
      15             :  * GNU General Public License for more details.
      16             :  *
      17             :  * You should have received a copy of the GNU General Public License along
      18             :  * with this program; if not, write to the Free Software Foundation, Inc.,
      19             :  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
      20             :  */
      21             : 
      22             : /** \file
      23             :  * \brief Create a guard in all functions that need to run on their own.
      24             :  *
      25             :  * This library is thread safe. It uses one mutex to guard any access
      26             :  * which requires safe access:
      27             :  *
      28             :  * \code
      29             :  *     {
      30             :  *         guard        g;
      31             :  *
      32             :  *         ...do multi-thread safe work...
      33             :  *     }
      34             :  * \endcode
      35             :  */
      36             : 
      37             : // self
      38             : //
      39             : #include    "snaplogger/guard.h"
      40             : 
      41             : 
      42             : // cppthread lib
      43             : //
      44             : #include    <cppthread/guard.h>
      45             : #include    <cppthread/mutex.h>
      46             : 
      47             : 
      48             : // last include
      49             : //
      50             : #include    <snapdev/poison.h>
      51             : 
      52             : 
      53             : 
      54             : namespace snaplogger
      55             : {
      56             : 
      57             : 
      58             : 
      59             : namespace
      60             : {
      61             : 
      62             : 
      63             : 
      64             : cppthread::mutex *      g_mutex = nullptr;
      65             : 
      66             : 
      67             : 
      68             : }
      69             : // no name namespace
      70             : 
      71             : 
      72             : 
      73             : 
      74             : 
      75      827456 : guard::guard()
      76             : {
      77             :     {
      78             :         // we know for sure that g_system_mutex was already initialized
      79             :         // so we can use it here
      80             :         //
      81     1654912 :         cppthread::guard lock(*cppthread::g_system_mutex);
      82             : 
      83      827456 :         if(g_mutex == nullptr)
      84             :         {
      85           2 :             g_mutex = new cppthread::mutex;
      86             :         }
      87             :     }
      88             : 
      89      827456 :     g_mutex->lock();
      90      827456 : }
      91             : 
      92             : 
      93      827456 : guard::~guard()
      94             : {
      95      827456 :     g_mutex->unlock();
      96      827456 : }
      97             : 
      98             : 
      99             : 
     100             : } // snaplogger namespace
     101             : // vim: ts=4 sw=4 et

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