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WebKit/Source/WebKitLegacy/Storage/StorageThread.cpp at main · DaRkZ2012/WebKit · GitHub
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StorageThread.cpp
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StorageThread.cpp
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/*
* Copyright (C) 2008 Apple Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#
include
"
StorageThread.h
"
#
include
<
wtf/AutodrainedPool.h
>
#
include
<
wtf/HashSet.h
>
#
include
<
wtf/MainThread.h
>
#
include
<
wtf/NeverDestroyed.h
>
namespace
WebCore
{
static
HashSet<CheckedRef<StorageThread>>&
activeStorageThreads
()
{
ASSERT
(
isMainThread
());
static
NeverDestroyed<HashSet<CheckedRef<StorageThread>>> threads;
return
threads;
}
StorageThread::StorageThread
(Type type)
: m_type(type)
{
ASSERT
(
isMainThread
());
}
StorageThread::~StorageThread
()
{
ASSERT
(
isMainThread
());
ASSERT
(!m_thread);
}
void
StorageThread::start
()
{
ASSERT
(
isMainThread
());
if
(!m_thread) {
if
(m_type == Type::LocalStorage) {
m_thread =
Thread::create
(
"
LocalStorage
"
_s, [
this
] {
threadEntryPoint
();
});
}
else
{
ASSERT
(m_type == Type::IndexedDB);
m_thread =
Thread::create
(
"
IndexedDB
"
_s, [
this
] {
threadEntryPoint
();
});
}
}
activeStorageThreads
().
add
(*
this
);
}
void
StorageThread::threadEntryPoint
()
{
ASSERT
(!
isMainThread
());
while
(
auto
function = m_queue.
waitForMessage
()) {
AutodrainedPool pool;
(*function)();
}
}
void
StorageThread::dispatch
(Function<
void
()>&& function)
{
ASSERT
(
isMainThread
());
ASSERT
(!m_queue.
killed
() && m_thread);
m_queue.
append
(makeUnique<Function<
void
()>>(
WTFMove
(function)));
}
void
StorageThread::terminate
()
{
ASSERT
(
isMainThread
());
ASSERT
(!m_queue.
killed
() && m_thread);
activeStorageThreads
().
remove
(*
this
);
//
Even in weird, exceptional cases, don't wait on a nonexistent thread to terminate.
if
(!m_thread)
return
;
m_queue.
append
(makeUnique<Function<
void
()>>([
this
] {
performTerminate
();
}));
m_thread->
waitForCompletion
();
ASSERT
(m_queue.
killed
());
m_thread =
nullptr
;
}
void
StorageThread::performTerminate
()
{
ASSERT
(!
isMainThread
());
m_queue.
kill
();
}
void
StorageThread::releaseFastMallocFreeMemoryInAllThreads
()
{
for
(
auto
& thread :
activeStorageThreads
())
thread->
dispatch
(&
WTF
::releaseFastMallocFreeMemory);
}
}
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