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juce_DeletedAtShutdown.cpp
/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2022 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
The code included in this file is provided under the terms of the ISC license
http://www.isc.org/downloads/software-support-policy/isc-license. Permission
To use, copy, modify, and/or distribute this software for any purpose with or
without fee is hereby granted provided that the above copyright notice and
this permission notice appear in all copies.
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
namespace juce
{
static SpinLock deletedAtShutdownLock; // use a spin lock because it can be statically initialised
static Array<DeletedAtShutdown*>& getDeletedAtShutdownObjects()
{
static Array<DeletedAtShutdown*> objects;
return objects;
}
DeletedAtShutdown::DeletedAtShutdown()
{
const SpinLock::ScopedLockType sl (deletedAtShutdownLock);
getDeletedAtShutdownObjects().add (this);
}
DeletedAtShutdown::~DeletedAtShutdown()
{
const SpinLock::ScopedLockType sl (deletedAtShutdownLock);
getDeletedAtShutdownObjects().removeFirstMatchingValue (this);
}
// Disable unreachable code warning, in case the compiler manages to figure out that
// you have no classes of DeletedAtShutdown that could throw an exception in their destructor.
JUCE_BEGIN_IGNORE_WARNINGS_MSVC (4702)
void DeletedAtShutdown::deleteAll()
{
// make a local copy of the array, so it can't get into a loop if something
// creates another DeletedAtShutdown object during its destructor.
Array<DeletedAtShutdown*> localCopy;
{
const SpinLock::ScopedLockType sl (deletedAtShutdownLock);
localCopy = getDeletedAtShutdownObjects();
}
for (int i = localCopy.size(); --i >= 0;)
{
JUCE_TRY
{
auto* deletee = localCopy.getUnchecked (i);
// double-check that it's not already been deleted during another object's destructor.
{
const SpinLock::ScopedLockType sl (deletedAtShutdownLock);
if (! getDeletedAtShutdownObjects().contains (deletee))
deletee = nullptr;
}
delete deletee;
}
JUCE_CATCH_EXCEPTION
}
// if this fails, then it's likely that some new DeletedAtShutdown objects were
// created while executing the destructors of the other ones.
jassert (getDeletedAtShutdownObjects().isEmpty());
getDeletedAtShutdownObjects().clear(); // just to make sure the array doesn't have any memory still allocated
}
JUCE_END_IGNORE_WARNINGS_MSVC
} // namespace juce
juce::Array
Definition juce_Array.h:56
juce::Array::size
int size() const noexcept
Definition juce_Array.h:215
juce::DeletedAtShutdown::deleteAll
static void deleteAll()
Definition juce_DeletedAtShutdown.cpp:50
juce::DeletedAtShutdown::~DeletedAtShutdown
virtual ~DeletedAtShutdown()
Definition juce_DeletedAtShutdown.cpp:40
juce::DeletedAtShutdown::DeletedAtShutdown
DeletedAtShutdown()
Definition juce_DeletedAtShutdown.cpp:34
juce::SpinLock
Definition juce_SpinLock.h:42
juce::SpinLock::ScopedLockType
GenericScopedLock< SpinLock > ScopedLockType
Definition juce_SpinLock.h:73