salhelper/source/condition.cxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  * This file incorporates work covered by the following license notice:
  10  *
  11  *   Licensed to the Apache Software Foundation (ASF) under one or more
  12  *   contributor license agreements. See the NOTICE file distributed
  13  *   with this work for additional information regarding copyright
  14  *   ownership. The ASF licenses this file to you under the Apache
  15  *   License, Version 2.0 (the "License"); you may not use this file
  16  *   except in compliance with the License. You may obtain a copy of
  17  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
  18  */
  19
  20
  21 #include <salhelper/condition.hxx>
  22 #include <osl/time.h>
  23 #include <osl/mutex.hxx>
  24
  25 using namespace salhelper;
  26
  27
  28 /******************************************************************
  29  *                                                                *
  30  *                     Condition                                  *
  31  *                                                                *
  32  ******************************************************************/
  33
  34 Condition::Condition(osl::Mutex& aMutex)
  35     : m_aMutex(aMutex)
  36 {
  37 }
  38
  39
  40 Condition::~Condition()
  41 {
  42 }
  43
  44
  45 /******************************************************************
  46  *                                                                *
  47  *              ConditionModifier                                 *
  48  *                                                                *
  49  ******************************************************************/
  50
  51 ConditionModifier::ConditionModifier(Condition& aCond)
  52     : m_aCond(aCond)
  53 {
  54     m_aCond.m_aMutex.acquire();
  55 }
  56
  57
  58 ConditionModifier::~ConditionModifier()
  59 {
  60     if(m_aCond.applies())
  61         m_aCond.m_aCondition.set();
  62
  63     m_aCond.m_aMutex.release();
  64 }
  65
  66
  67 /******************************************************************
  68  *                                                                *
  69  *              ConditionWaiter                                   *
  70  *                                                                *
  71  ******************************************************************/
  72
  73 ConditionWaiter::timedout::timedout() {}
  74
  75 ConditionWaiter::timedout::timedout(timedout const &) {}
  76
  77 ConditionWaiter::timedout::~timedout() {}
  78
  79 ConditionWaiter::timedout &
  80 ConditionWaiter::timedout::operator =(timedout const &) { return *this; }
  81
  82 ConditionWaiter::ConditionWaiter(Condition& aCond)
  83     : m_aCond(aCond)
  84 {
  85     while(true) {
  86         m_aCond.m_aCondition.wait();
  87         m_aCond.m_aMutex.acquire();
  88
  89         if(m_aCond.applies())
  90             break;
  91         else {
  92             m_aCond.m_aCondition.reset();
  93             m_aCond.m_aMutex.release();
  94         }
  95     }
  96 }
  97
  98
  99 ConditionWaiter::ConditionWaiter(Condition& aCond,sal_uInt32 milliSec)
 100     : m_aCond(aCond)
 101 {
 102     TimeValue aTime;
 103     aTime.Seconds = milliSec / 1000;
 104     aTime.Nanosec = 1000000 * ( milliSec % 1000 );
 105
 106     while(true) {
 107         if( m_aCond.m_aCondition.wait(&aTime) ==
 108             osl::Condition::result_timeout )
 109             throw timedout();
 110
 111         m_aCond.m_aMutex.acquire();
 112
 113         if(m_aCond.applies())
 114             break;
 115         else {
 116             m_aCond.m_aCondition.reset();
 117             m_aCond.m_aMutex.release();
 118         }
 119     }
 120 }
 121
 122
 123 ConditionWaiter::~ConditionWaiter()
 124 {
 125     if(! m_aCond.applies())
 126         m_aCond.m_aCondition.reset();
 127     m_aCond.m_aMutex.release();
 128 }
 129
 130 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */