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/*
* Copyright (C) 2021 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. AND ITS CONTRIBUTORS ``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 ITS 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 "FileSystemSyncAccessHandle.h"
#include "BufferSource.h"
#include "FileSystemFileHandle.h"
#include "JSDOMPromiseDeferred.h"
#include <wtf/CompletionHandler.h>
namespace WebCore {
Ref<FileSystemSyncAccessHandle> FileSystemSyncAccessHandle::create(ScriptExecutionContext& context, FileSystemFileHandle& source, FileSystemSyncAccessHandleIdentifier identifier, FileHandle&& file, uint64_t capacity)
{
auto handle = adoptRef(*new FileSystemSyncAccessHandle(context, source, identifier, WTFMove(file), capacity));
handle->suspendIfNeeded();
return handle;
}
FileSystemSyncAccessHandle::FileSystemSyncAccessHandle(ScriptExecutionContext& context, FileSystemFileHandle& source, FileSystemSyncAccessHandleIdentifier identifier, FileHandle&& file, uint64_t capacity)
: ActiveDOMObject(&context)
, m_source(source)
, m_identifier(identifier)
, m_file(WTFMove(file))
, m_capacity(capacity)
{
ASSERT(m_file);
m_source->registerSyncAccessHandle(m_identifier, *this);
}
FileSystemSyncAccessHandle::~FileSystemSyncAccessHandle()
{
m_source->unregisterSyncAccessHandle(m_identifier);
closeInternal(ShouldNotifyBackend::Yes);
}
ExceptionOr<void> FileSystemSyncAccessHandle::truncate(unsigned long long size)
{
if (m_isClosed)
return Exception { InvalidStateError, "AccessHandle is closed"_s };
bool succeeded = FileSystem::truncateFile(m_file.handle(), size);
return succeeded ? ExceptionOr<void> { } : Exception { InvalidStateError, "Failed to truncate file"_s };
}
ExceptionOr<unsigned long long> FileSystemSyncAccessHandle::getSize()
{
if (m_isClosed)
return Exception { InvalidStateError, "AccessHandle is closed"_s };
auto result = FileSystem::fileSize(m_file.handle());
return result ? ExceptionOr<unsigned long long> { result.value() } : Exception { InvalidStateError, "Failed to get file size"_s };
}
ExceptionOr<void> FileSystemSyncAccessHandle::flush()
{
if (m_isClosed)
return Exception { InvalidStateError, "AccessHandle is closed"_s };
bool succeeded = FileSystem::flushFile(m_file.handle());
return succeeded ? ExceptionOr<void> { } : Exception { InvalidStateError, "Failed to flush file"_s };
}
ExceptionOr<void> FileSystemSyncAccessHandle::close()
{
if (m_isClosed)
return { };
closeInternal(ShouldNotifyBackend::Yes);
return { };
}
void FileSystemSyncAccessHandle::closeInternal(ShouldNotifyBackend shouldNotifyBackend)
{
if (m_isClosed)
return;
m_isClosed = true;
ASSERT(m_file);
m_file = { };
if (shouldNotifyBackend == ShouldNotifyBackend::Yes)
m_source->closeSyncAccessHandle(m_identifier);
}
ExceptionOr<unsigned long long> FileSystemSyncAccessHandle::read(BufferSource&& buffer, FileSystemSyncAccessHandle::FilesystemReadWriteOptions options)
{
if (m_isClosed)
return Exception { InvalidStateError, "AccessHandle is closed"_s };
if (options.at) {
auto result = FileSystem::seekFile(m_file.handle(), options.at.value(), FileSystem::FileSeekOrigin::Beginning);
if (result == -1)
return Exception { InvalidStateError, "Failed to read at offset"_s };
}
int result = FileSystem::readFromFile(m_file.handle(), buffer.mutableData(), buffer.length());
if (result == -1)
return Exception { InvalidStateError, "Failed to read from file"_s };
return result;
}
ExceptionOr<unsigned long long> FileSystemSyncAccessHandle::write(BufferSource&& buffer, FileSystemSyncAccessHandle::FilesystemReadWriteOptions options)
{
if (m_isClosed)
return Exception { InvalidStateError, "AccessHandle is closed"_s };
if (options.at) {
auto result = FileSystem::seekFile(m_file.handle(), options.at.value(), FileSystem::FileSeekOrigin::Beginning);
if (result == -1)
return Exception { InvalidStateError, "Failed to write at offset"_s };
} else {
auto result = FileSystem::seekFile(m_file.handle(), 0, FileSystem::FileSeekOrigin::Current);
if (result == -1)
return Exception { InvalidStateError, "Failed to get offset"_s };
options.at = result;
}
if (!requestSpaceForWrite(*options.at, buffer.length()))
return Exception { QuotaExceededError };
int result = FileSystem::writeToFile(m_file.handle(), buffer.data(), buffer.length());
if (result == -1)
return Exception { InvalidStateError, "Failed to write to file"_s };
return result;
}
const char* FileSystemSyncAccessHandle::activeDOMObjectName() const
{
return "FileSystemSyncAccessHandle";
}
void FileSystemSyncAccessHandle::stop()
{
closeInternal(ShouldNotifyBackend::Yes);
}
void FileSystemSyncAccessHandle::invalidate()
{
// Invalidation is initiated by backend.
closeInternal(ShouldNotifyBackend::No);
}
bool FileSystemSyncAccessHandle::requestSpaceForWrite(uint64_t writeOffset, uint64_t writeLength)
{
CheckedUint64 newSize = writeOffset;
newSize += writeLength;
if (newSize.hasOverflowed())
return false;
if (newSize <= m_capacity)
return true;
auto newCapacity = m_source->requestNewCapacityForSyncAccessHandle(m_identifier, (uint64_t)newSize);
if (newCapacity)
m_capacity = *newCapacity;
return newSize <= m_capacity;
}
} // namespace WebCore
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