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// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/file_system_provider/content_cache/cache_file_context.h"
#include "base/logging.h"
namespace ash::file_system_provider {
CacheFileContext::CacheFileContext(const std::string& version_tag,
int64_t bytes_on_disk,
int64_t id,
const base::FilePath& path_on_disk)
: bytes_on_disk_(bytes_on_disk),
version_tag_(version_tag),
id_(id),
path_on_disk_(path_on_disk) {}
CacheFileContext::CacheFileContext(CacheFileContext&&) = default;
CacheFileContext::~CacheFileContext() = default;
bool CacheFileContext::CanGetLocalFD(const OpenedCloudFile& file) const {
if (open_fds_.contains(file.request_id)) {
// Already has access to the cached file.
return true;
}
if (path_on_disk_.empty()) {
VLOG(2) << "No cached file on disk yet";
return false;
}
if (file.version_tag != version_tag_) {
VLOG(2) << "File version does not match cached file version";
return false;
}
if (evicted_) {
VLOG(2) << "No new accesses allowed on evicted files";
return false;
}
return true;
}
LocalFD& CacheFileContext::GetLocalFD(
const OpenedCloudFile& file,
scoped_refptr<base::SequencedTaskRunner> io_task_runner) {
CHECK(CanGetLocalFD(file));
// Either get the existing LocalFD for the request_id or create a new one.
auto [it, inserted] =
open_fds_.try_emplace(file.request_id, path_on_disk_, io_task_runner);
VLOG_IF(1, !inserted) << "Re-using cached file descriptor {request_id = '"
<< file.request_id << "', path = '" << path_on_disk_
<< "'}";
return it->second;
}
} // namespace ash::file_system_provider
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