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       m_aCondition()
  37 {
  38 }
  39
  40
  41 Condition::~Condition()
  42 {
  43 }
  44
  45
  46 /******************************************************************
  47  *                                                                *
  48  *              ConditionModifier                                 *
  49  *                                                                *
  50  ******************************************************************/
  51
  52 ConditionModifier::ConditionModifier(Condition& aCond)
  53     : m_aCond(aCond)
  54 {
  55     m_aCond.m_aMutex.acquire();
  56 }
  57
  58
  59 ConditionModifier::~ConditionModifier()
  60 {
  61     if(m_aCond.applies())
  62         m_aCond.m_aCondition.set();
  63
  64     m_aCond.m_aMutex.release();
  65 }
  66
  67
  68 /******************************************************************
  69  *                                                                *
  70  *              ConditionWaiter                                   *
  71  *                                                                *
  72  ******************************************************************/
  73
  74 ConditionWaiter::timedout::timedout() {}
  75
  76 ConditionWaiter::timedout::timedout(timedout const &) {}
  77
  78 ConditionWaiter::timedout::~timedout() {}
  79
  80 ConditionWaiter::timedout &
  81 ConditionWaiter::timedout::operator =(timedout const &) { return *this; }
  82
  83 ConditionWaiter::ConditionWaiter(Condition& aCond)
  84     : m_aCond(aCond)
  85 {
  86     while(true) {
  87         m_aCond.m_aCondition.wait();
  88         m_aCond.m_aMutex.acquire();
  89
  90         if(m_aCond.applies())
  91             break;
  92         else {
  93             m_aCond.m_aCondition.reset();
  94             m_aCond.m_aMutex.release();
  95         }
  96     }
  97 }
  98
  99
 100 ConditionWaiter::ConditionWaiter(Condition& aCond,sal_uInt32 milliSec)
 101     : m_aCond(aCond)
 102 {
 103     TimeValue aTime;
 104     aTime.Seconds = milliSec / 1000;
 105     aTime.Nanosec = 1000000 * ( milliSec % 1000 );
 106
 107     while(true) {
 108         if( m_aCond.m_aCondition.wait(&aTime) ==
 109             osl::Condition::result_timeout )
 110             throw timedout();
 111
 112         m_aCond.m_aMutex.acquire();
 113
 114         if(m_aCond.applies())
 115             break;
 116         else {
 117             m_aCond.m_aCondition.reset();
 118             m_aCond.m_aMutex.release();
 119         }
 120     }
 121 }
 122
 123
 124 ConditionWaiter::~ConditionWaiter()
 125 {
 126     if(! m_aCond.applies())
 127         m_aCond.m_aCondition.reset();
 128     m_aCond.m_aMutex.release();
 129 }
 130
 131 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */