/* * Copyright (C) 2013 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 "OriginLock.h" #if ENABLE(SQL_DATABASE) #include "FileSystem.h" #include <wtf/PassOwnPtr.h> namespace WebCore { String OriginLock::lockFileNameForPath(String originPath) { return pathByAppendingComponent(originPath, String(".lock")); } OriginLock::OriginLock(String originPath) : m_lockFileName(lockFileNameForPath(originPath).isolatedCopy()) #if USE(FILE_LOCK) , m_lockHandle(invalidPlatformFileHandle) #endif { } OriginLock::~OriginLock() { } void OriginLock::lock() { m_mutex.lock(); #if USE(FILE_LOCK) m_lockHandle = openFile(m_lockFileName, OpenForWrite); if (m_lockHandle == invalidPlatformFileHandle) { // The only way we can get here is if the directory containing the lock // has been deleted or we were given a path to a non-existant directory. // In that case, there's nothing we can do but cleanup and return. m_mutex.unlock(); return; } lockFile(m_lockHandle, LockExclusive); #endif } void OriginLock::unlock() { #if USE(FILE_LOCK) // If the file descriptor was uninitialized, then that means the directory // containing the lock has been deleted before we opened the lock file, or // we were given a path to a non-existant directory. Which, in turn, means // that there's nothing to unlock. if (m_lockHandle == invalidPlatformFileHandle) return; unlockFile(m_lockHandle); closeFile(m_lockHandle); m_lockHandle = invalidPlatformFileHandle; #endif m_mutex.unlock(); } void OriginLock::deleteLockFile(String originPath) { UNUSED_PARAM(originPath); #if USE(FILE_LOCK) String lockFileName = OriginLock::lockFileNameForPath(originPath); deleteFile(lockFileName); #endif } } // namespace WebCore #endif // ENABLE(SQL_DATABASE)