vcl/inc/graphic/Manager.hxx

   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
  10 #pragma once
  11
  12 #include <sal/types.h>
  13 #include <rtl/strbuf.hxx>
  14 #include <vcl/timer.hxx>
  15
  16 #include <memory>
  17 #include <mutex>
  18 #include <chrono>
  19 #include <o3tl/sorted_vector.hxx>
  20
  21 namespace vcl::graphic
  22 {
  23 class MemoryManaged;
  24
  25 class VCL_DLLPUBLIC MemoryManager final
  26 {
  27 private:
  28     o3tl::sorted_vector<MemoryManaged*> maObjectList;
  29     sal_Int64 mnTotalSize = 0;
  30     std::mutex maMutex; // instead of SolarMutex because graphics can live past vcl main
  31
  32     std::chrono::seconds mnAllowedIdleTime = std::chrono::seconds(1);
  33     bool mbSwapEnabled = true;
  34     bool mbReducingGraphicMemory = false;
  35     sal_Int64 mnMemoryLimit = 10'000'000;
  36     Timer maSwapOutTimer;
  37     sal_Int32 mnTimeout = 1'000;
  38     sal_Int64 mnSmallFrySize = 100'000;
  39
  40     DECL_LINK(ReduceMemoryTimerHandler, Timer*, void);
  41
  42 public:
  43     MemoryManager();
  44     void registerObject(MemoryManaged* pObject);
  45     void unregisterObject(MemoryManaged* pObject);
  46     void changeExisting(MemoryManaged* pObject, sal_Int64 nNewSize);
  47
  48     void swappedIn(MemoryManaged* pObject, sal_Int64 nNewSize);
  49     void swappedOut(MemoryManaged* pObject, sal_Int64 nNewSize);
  50
  51     static MemoryManager& get();
  52     o3tl::sorted_vector<MemoryManaged*> const& getManagedObjects() { return maObjectList; }
  53     sal_Int64 getTotalSize() { return mnTotalSize; }
  54
  55     void reduceMemory(std::unique_lock<std::mutex>& rGuard, bool bDropAll = false);
  56     void loopAndReduceMemory(std::unique_lock<std::mutex>& rGuard, bool bDropAll = false);
  57     void reduceAllAndNow();
  58     void dumpState(rtl::OStringBuffer& rState);
  59 };
  60
  61 } // end namespace vcl::graphic
  62
  63 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */