1 /*
2 * Copyright (c) 2021, The Android Open Source Project
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 #include "RingBuffer.h"
18
19 #include <android-base/logging.h>
20
21 #include <inttypes.h> // for PRIu64 and friends
22
23 #include <memory>
24
25 namespace android {
26 namespace automotive {
27 namespace telemetry {
28
RingBuffer(int32_t limit)29 RingBuffer::RingBuffer(int32_t limit) : mSizeLimit(limit) {}
30
push(BufferedCarData && data)31 void RingBuffer::push(BufferedCarData&& data) {
32 mList.push_back(std::move(data));
33 while (mList.size() > mSizeLimit) {
34 mList.pop_front();
35 mTotalDroppedDataCount += 1;
36 }
37 }
38
popBack()39 BufferedCarData RingBuffer::popBack() {
40 auto result = std::move(mList.back());
41 mList.pop_back();
42 return result;
43 }
44
dump(int fd) const45 void RingBuffer::dump(int fd) const {
46 dprintf(fd, " RingBuffer:\n");
47 dprintf(fd, " mSizeLimit=%d\n", mSizeLimit);
48 dprintf(fd, " mList.size=%zu\n", mList.size());
49 dprintf(fd, " mTotalDroppedDataCount=%" PRIu64 "\n", mTotalDroppedDataCount);
50 }
51
size() const52 int32_t RingBuffer::size() const {
53 return mList.size();
54 }
55
56 } // namespace telemetry
57 } // namespace automotive
58 } // namespace android
59