vcl/generic/app/geninst.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 #include <string.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23
  24 #include "osl/module.hxx"
  25 #include "tools/solarmutex.hxx"
  26
  27 #include "generic/geninst.h"
  28
  29 // -------------------------------------------------------------------------
  30 //
  31 // SalYieldMutex
  32 //
  33 // -------------------------------------------------------------------------
  34
  35 SalYieldMutex::SalYieldMutex()
  36 {
  37     mnCount     = 0;
  38     mnThreadId  = 0;
  39     ::tools::SolarMutex::SetSolarMutex( this );
  40 }
  41
  42 SalYieldMutex::~SalYieldMutex()
  43 {
  44     ::tools::SolarMutex::SetSolarMutex( NULL );
  45 }
  46
  47 void SalYieldMutex::acquire()
  48 {
  49     SolarMutexObject::acquire();
  50     mnThreadId = osl::Thread::getCurrentIdentifier();
  51     mnCount++;
  52 }
  53
  54 void SalYieldMutex::release()
  55 {
  56     OSL_ENSURE(mnCount > 0, "SalYieldMutex::release() called with zero count");
  57     if ( mnThreadId == osl::Thread::getCurrentIdentifier() )
  58     {
  59         if ( mnCount == 1 )
  60             mnThreadId = 0;
  61         mnCount--;
  62     }
  63     SolarMutexObject::release();
  64 }
  65
  66 bool SalYieldMutex::tryToAcquire()
  67 {
  68     if ( SolarMutexObject::tryToAcquire() )
  69     {
  70         mnThreadId = osl::Thread::getCurrentIdentifier();
  71         mnCount++;
  72         return true;
  73     }
  74     else
  75         return false;
  76 }
  77
  78 comphelper::SolarMutex* SalGenericInstance::GetYieldMutex()
  79 {
  80     return mpSalYieldMutex;
  81 }
  82
  83 sal_uLong SalGenericInstance::ReleaseYieldMutex()
  84 {
  85     SalYieldMutex* pYieldMutex = mpSalYieldMutex;
  86     if ( pYieldMutex->GetThreadId() ==
  87          osl::Thread::getCurrentIdentifier() )
  88     {
  89         sal_uLong nCount = pYieldMutex->GetAcquireCount();
  90         sal_uLong n = nCount;
  91         while ( n )
  92         {
  93             pYieldMutex->release();
  94             n--;
  95         }
  96
  97         return nCount;
  98     }
  99     else
 100         return 0;
 101 }
 102
 103 void SalGenericInstance::AcquireYieldMutex( sal_uLong nCount )
 104 {
 105     SalYieldMutex* pYieldMutex = mpSalYieldMutex;
 106     while ( nCount )
 107     {
 108         pYieldMutex->acquire();
 109         nCount--;
 110     }
 111 }
 112
 113 bool SalGenericInstance::CheckYieldMutex()
 114 {
 115     bool bRet = true;
 116
 117     SalYieldMutex* pYieldMutex = mpSalYieldMutex;
 118     if ( pYieldMutex->GetThreadId() != osl::Thread::getCurrentIdentifier() )
 119         bRet = false;
 120
 121     return bRet;
 122 }
 123
 124 SalGenericInstance::~SalGenericInstance()
 125 {
 126     ::tools::SolarMutex::SetSolarMutex( 0 );
 127     delete mpSalYieldMutex;
 128 }