/src/libreoffice/include/comphelper/doublecheckedinit.hxx
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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 | | #ifndef INCLUDED_COMPHELPER_DOUBLECHECKEDINIT_HXX |
21 | | #define INCLUDED_COMPHELPER_DOUBLECHECKEDINIT_HXX |
22 | | |
23 | | #include <osl/getglobalmutex.hxx> |
24 | | |
25 | | #include <atomic> |
26 | | // HACK: <atomic> includes <stdbool.h>, which in some Clang versions does '#define bool bool', |
27 | | // which confuses clang plugins. |
28 | | #undef bool |
29 | | #include <functional> |
30 | | |
31 | | namespace comphelper |
32 | | { |
33 | | /** |
34 | | * Thread-safe singleton creation. |
35 | | * |
36 | | * It is normally sufficient to create singletons using static variables in a function. |
37 | | * This function is only for use cases that have a more complex lifetime of the object, |
38 | | * such as when the object may require specific cleanup or may be created more times |
39 | | * (e.g. when there is a "singleton" per each instance of another object). |
40 | | */ |
41 | | template <typename Type, typename Function = std::function<Type*()>, |
42 | | typename Guard = osl::MutexGuard, typename GuardCtor = osl::GetGlobalMutex> |
43 | | static inline Type* doubleCheckedInit(std::atomic<Type*>& pointer, Function function, |
44 | | GuardCtor guardCtor = osl::GetGlobalMutex()) |
45 | 4.28M | { |
46 | 4.28M | Type* p = pointer.load(std::memory_order_acquire); |
47 | 4.28M | if (!p) |
48 | 18.5k | { |
49 | 18.5k | Guard guard(guardCtor()); |
50 | 18.5k | p = pointer.load(std::memory_order_relaxed); |
51 | 18.5k | if (!p) |
52 | 18.5k | { |
53 | 18.5k | p = function(); |
54 | 18.5k | pointer.store(p, std::memory_order_release); |
55 | 18.5k | } |
56 | 18.5k | } |
57 | 4.28M | return p; |
58 | 4.28M | } global.cxx:LegacyFuncCollection* comphelper::doubleCheckedInit<LegacyFuncCollection, ScGlobal::GetLegacyFuncCollection()::$_0, osl::Guard<osl::Mutex>, osl::GetGlobalMutex>(std::__1::atomic<LegacyFuncCollection*>&, ScGlobal::GetLegacyFuncCollection()::$_0, osl::GetGlobalMutex) Line | Count | Source | 45 | 1.06M | { | 46 | 1.06M | Type* p = pointer.load(std::memory_order_acquire); | 47 | 1.06M | if (!p) | 48 | 5 | { | 49 | 5 | Guard guard(guardCtor()); | 50 | 5 | p = pointer.load(std::memory_order_relaxed); | 51 | 5 | if (!p) | 52 | 5 | { | 53 | 5 | p = function(); | 54 | 5 | pointer.store(p, std::memory_order_release); | 55 | 5 | } | 56 | 5 | } | 57 | 1.06M | return p; | 58 | 1.06M | } |
global.cxx:ScUnoAddInCollection* comphelper::doubleCheckedInit<ScUnoAddInCollection, ScGlobal::GetAddInCollection()::$_0, osl::Guard<osl::Mutex>, osl::GetGlobalMutex>(std::__1::atomic<ScUnoAddInCollection*>&, ScGlobal::GetAddInCollection()::$_0, osl::GetGlobalMutex) Line | Count | Source | 45 | 1.08M | { | 46 | 1.08M | Type* p = pointer.load(std::memory_order_acquire); | 47 | 1.08M | if (!p) | 48 | 6 | { | 49 | 6 | Guard guard(guardCtor()); | 50 | 6 | p = pointer.load(std::memory_order_relaxed); | 51 | 6 | if (!p) | 52 | 6 | { | 53 | 6 | p = function(); | 54 | 6 | pointer.store(p, std::memory_order_release); | 55 | 6 | } | 56 | 6 | } | 57 | 1.08M | return p; | 58 | 1.08M | } |
Unexecuted instantiation: global.cxx:ScUnitConverter* comphelper::doubleCheckedInit<ScUnitConverter, ScGlobal::GetUnitConverter()::$_0, osl::Guard<osl::Mutex>, osl::GetGlobalMutex>(std::__1::atomic<ScUnitConverter*>&, ScGlobal::GetUnitConverter()::$_0, osl::GetGlobalMutex) global.cxx:utl::TransliterationWrapper* comphelper::doubleCheckedInit<utl::TransliterationWrapper, ScGlobal::GetTransliteration()::$_0, osl::Guard<osl::Mutex>, osl::GetGlobalMutex>(std::__1::atomic<utl::TransliterationWrapper*>&, ScGlobal::GetTransliteration()::$_0, osl::GetGlobalMutex) Line | Count | Source | 45 | 1.84M | { | 46 | 1.84M | Type* p = pointer.load(std::memory_order_acquire); | 47 | 1.84M | if (!p) | 48 | 3 | { | 49 | 3 | Guard guard(guardCtor()); | 50 | 3 | p = pointer.load(std::memory_order_relaxed); | 51 | 3 | if (!p) | 52 | 3 | { | 53 | 3 | p = function(); | 54 | 3 | pointer.store(p, std::memory_order_release); | 55 | 3 | } | 56 | 3 | } | 57 | 1.84M | return p; | 58 | 1.84M | } |
Unexecuted instantiation: global.cxx:utl::TransliterationWrapper* comphelper::doubleCheckedInit<utl::TransliterationWrapper, ScGlobal::GetCaseTransliteration()::$_0, osl::Guard<osl::Mutex>, osl::GetGlobalMutex>(std::__1::atomic<utl::TransliterationWrapper*>&, ScGlobal::GetCaseTransliteration()::$_0, osl::GetGlobalMutex) global.cxx:CollatorWrapper* comphelper::doubleCheckedInit<CollatorWrapper, ScGlobal::GetCollator()::$_0, osl::Guard<osl::Mutex>, (anonymous namespace)::GetMutex>(std::__1::atomic<CollatorWrapper*>&, ScGlobal::GetCollator()::$_0, (anonymous namespace)::GetMutex) Line | Count | Source | 45 | 28.5k | { | 46 | 28.5k | Type* p = pointer.load(std::memory_order_acquire); | 47 | 28.5k | if (!p) | 48 | 1 | { | 49 | 1 | Guard guard(guardCtor()); | 50 | 1 | p = pointer.load(std::memory_order_relaxed); | 51 | 1 | if (!p) | 52 | 1 | { | 53 | 1 | p = function(); | 54 | 1 | pointer.store(p, std::memory_order_release); | 55 | 1 | } | 56 | 1 | } | 57 | 28.5k | return p; | 58 | 28.5k | } |
Unexecuted instantiation: global.cxx:CollatorWrapper* comphelper::doubleCheckedInit<CollatorWrapper, ScGlobal::GetCaseCollator()::$_0, osl::Guard<osl::Mutex>, (anonymous namespace)::GetMutex>(std::__1::atomic<CollatorWrapper*>&, ScGlobal::GetCaseCollator()::$_0, (anonymous namespace)::GetMutex) global.cxx:com::sun::star::lang::Locale* comphelper::doubleCheckedInit<com::sun::star::lang::Locale, ScGlobal::GetLocale()::$_0, osl::Guard<osl::Mutex>, osl::GetGlobalMutex>(std::__1::atomic<com::sun::star::lang::Locale*>&, ScGlobal::GetLocale()::$_0, osl::GetGlobalMutex) Line | Count | Source | 45 | 4 | { | 46 | 4 | Type* p = pointer.load(std::memory_order_acquire); | 47 | 4 | if (!p) | 48 | 3 | { | 49 | 3 | Guard guard(guardCtor()); | 50 | 3 | p = pointer.load(std::memory_order_relaxed); | 51 | 3 | if (!p) | 52 | 3 | { | 53 | 3 | p = function(); | 54 | 3 | pointer.store(p, std::memory_order_release); | 55 | 3 | } | 56 | 3 | } | 57 | 4 | return p; | 58 | 4 | } |
Unexecuted instantiation: global.cxx:sc::SharedStringPoolPurge* comphelper::doubleCheckedInit<sc::SharedStringPoolPurge, ScGlobal::GetSharedStringPoolPurge()::$_0, osl::Guard<osl::Mutex>, osl::GetGlobalMutex>(std::__1::atomic<sc::SharedStringPoolPurge*>&, ScGlobal::GetSharedStringPoolPurge()::$_0, osl::GetGlobalMutex) documentlinkmgr.cxx:sfx2::LinkManager* comphelper::doubleCheckedInit<sfx2::LinkManager, sc::DocumentLinkManager::getLinkManager(bool)::$_0, osl::Guard<osl::Mutex>, osl::GetGlobalMutex>(std::__1::atomic<sfx2::LinkManager*>&, sc::DocumentLinkManager::getLinkManager(bool)::$_0, osl::GetGlobalMutex) Line | Count | Source | 45 | 258k | { | 46 | 258k | Type* p = pointer.load(std::memory_order_acquire); | 47 | 258k | if (!p) | 48 | 18.5k | { | 49 | 18.5k | Guard guard(guardCtor()); | 50 | 18.5k | p = pointer.load(std::memory_order_relaxed); | 51 | 18.5k | if (!p) | 52 | 18.5k | { | 53 | 18.5k | p = function(); | 54 | 18.5k | pointer.store(p, std::memory_order_release); | 55 | 18.5k | } | 56 | 18.5k | } | 57 | 258k | return p; | 58 | 258k | } |
|
59 | | |
60 | | } // namespace |
61 | | |
62 | | #endif // INCLUDED_COMPHELPER_DOUBLECHECKEDINIT_HXX |
63 | | |
64 | | /* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |