1/*******************************************************************************
2* Copyright 2021 Intel Corporation
3*
4* Licensed under the Apache License, Version 2.0 (the "License");
5* you may not use this file except in compliance with the License.
6* You may obtain a copy of the License at
7*
8* http://www.apache.org/licenses/LICENSE-2.0
9*
10* Unless required by applicable law or agreed to in writing, software
11* distributed under the License is distributed on an "AS IS" BASIS,
12* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13* See the License for the specific language governing permissions and
14* limitations under the License.
15*******************************************************************************/
16
17#ifndef COMMON_CACHE_BLOB_ID_HPP
18#define COMMON_CACHE_BLOB_ID_HPP
19
20#include <atomic>
21#include <cstdint>
22#include <mutex>
23#include <vector>
24#include <type_traits>
25
26#include "common/serialization_stream.hpp"
27
28namespace dnnl {
29namespace impl {
30
31struct primitive_desc_t;
32struct cache_blob_id_t {
33 cache_blob_id_t() : is_initialized_ {false} {}
34 cache_blob_id_t(const cache_blob_id_t &other)
35 : sstream_(other.is_initialized_ ? other.sstream_
36 : serialization_stream_t {})
37 , is_initialized_(!sstream_.empty()) {}
38
39 cache_blob_id_t(cache_blob_id_t &&other) = delete;
40 cache_blob_id_t &operator=(const cache_blob_id_t &other) = delete;
41 cache_blob_id_t &operator=(cache_blob_id_t &&other) = delete;
42
43 const std::vector<uint8_t> &get(
44 const engine_t *engine, const primitive_desc_t *pd);
45
46private:
47 serialization_stream_t sstream_;
48 std::once_flag flag_;
49
50 // The `std::once_flag` is neither copyable nor movable therefore we
51 // define a copy constructor that skips copying the `flag_`. To be able
52 // to carry over the `flag_`'s state from the `other` object we introduce
53 // an atomic `is_initialized_` flag.
54 std::atomic<bool> is_initialized_;
55};
56
57} // namespace impl
58} // namespace dnnl
59
60#endif
61