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/*
* Copyright (C) 2010, 2012 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 "config.h"
#include "SQLiteDatabaseTracker.h"
#include <mutex>
#include <wtf/NeverDestroyed.h>
namespace WebCore {
namespace SQLiteDatabaseTracker {
static SQLiteDatabaseTrackerClient* s_staticSQLiteDatabaseTrackerClient = nullptr;
static unsigned s_transactionInProgressCounter = 0;
static std::mutex& transactionInProgressMutex()
{
static NeverDestroyed<std::mutex> tipMutex;
return tipMutex;
}
void setClient(SQLiteDatabaseTrackerClient* client)
{
ASSERT(client);
ASSERT(!s_staticSQLiteDatabaseTrackerClient || s_staticSQLiteDatabaseTrackerClient == client);
s_staticSQLiteDatabaseTrackerClient = client;
}
void incrementTransactionInProgressCount()
{
if (!s_staticSQLiteDatabaseTrackerClient)
return;
std::lock_guard<std::mutex> lock(transactionInProgressMutex());
s_transactionInProgressCounter++;
if (s_transactionInProgressCounter == 1)
s_staticSQLiteDatabaseTrackerClient->willBeginFirstTransaction();
}
void decrementTransactionInProgressCount()
{
if (!s_staticSQLiteDatabaseTrackerClient)
return;
std::lock_guard<std::mutex> lock(transactionInProgressMutex());
ASSERT(s_transactionInProgressCounter);
s_transactionInProgressCounter--;
if (!s_transactionInProgressCounter)
s_staticSQLiteDatabaseTrackerClient->didFinishLastTransaction();
}
#if !ASSERT_DISABLED
bool hasTransactionInProgress()
{
return !s_staticSQLiteDatabaseTrackerClient || s_transactionInProgressCounter > 0;
}
#endif
} // namespace SQLiteDatabaseTracker
} // namespace WebCore
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