//
// Copyright (C) 2015 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#ifndef UPDATE_ENGINE_PAYLOAD_GENERATOR_BLOB_FILE_WRITER_H_
#define UPDATE_ENGINE_PAYLOAD_GENERATOR_BLOB_FILE_WRITER_H_
#include
#include
#include
namespace chromeos_update_engine {
class BlobFileWriter {
public:
// Create the BlobFileWriter object that will manage the blobs stored to
// |blob_fd| in a thread safe way.
BlobFileWriter(int blob_fd, off_t* blob_file_size)
: blob_fd_(blob_fd), blob_file_size_(blob_file_size) {}
// Store the passed |blob| in the blob file. Returns the offset at which it
// was stored, or -1 in case of failure.
off_t StoreBlob(const brillo::Blob& blob);
// The number of |total_blobs| is the number of blobs that will be stored but
// is only used for logging purposes. If not set or set to 0, logging will be
// skipped. This function will also reset the number of stored blobs to 0.
void SetTotalBlobs(size_t total_blobs);
private:
size_t total_blobs_{0};
size_t stored_blobs_{0};
// The file and its size are protected with the |blob_mutex_|.
int blob_fd_;
off_t* blob_file_size_;
base::Lock blob_mutex_;
DISALLOW_COPY_AND_ASSIGN(BlobFileWriter);
};
} // namespace chromeos_update_engine
#endif // UPDATE_ENGINE_PAYLOAD_GENERATOR_BLOB_FILE_WRITER_H_