1/*
2 * Copyright (c) 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15#include "usb_ddk_hash.h"
16#include <functional>
17#include <mutex>
18#include <unordered_map>
19#include <iostream>
20
21#include "hdf_base.h"
22#include "usbd_wrapper.h"
23
24static std::unordered_map<uint64_t, InterfaceInfo> g_hashMap;
25std::mutex g_mapMutex;
26
27constexpr size_t MAX_HASH_RECORD = 1000;
28
29int32_t UsbDdkHash(const InterfaceInfo &info, uint64_t &hashVal)
30{
31    std::lock_guard<std::mutex> lock(g_mapMutex);
32
33    if (g_hashMap.size() > MAX_HASH_RECORD) {
34        return HDF_ERR_OUT_OF_RANGE;
35    }
36
37    hashVal = static_cast<uint64_t>(std::hash<uint64_t> {}(info.addr));
38    g_hashMap.emplace(hashVal, info);
39    return HDF_SUCCESS;
40}
41
42int32_t UsbDdkUnHash(uint64_t hashVal, uint64_t &addr)
43{
44    std::lock_guard<std::mutex> lock(g_mapMutex);
45    if (auto ret = g_hashMap.find(hashVal); ret == g_hashMap.end()) {
46        return HDF_ERR_INVALID_PARAM;
47    }
48    auto mappedVal = g_hashMap[hashVal];
49    addr = mappedVal.addr;
50    return HDF_SUCCESS;
51}
52
53void UsbDdkDelHashRecord(uint64_t hashVal)
54{
55    std::lock_guard<std::mutex> lock(g_mapMutex);
56    g_hashMap.erase(hashVal);
57}
58
59bool UsbDdkGetRecordByVal(const InterfaceInfo &info, uint64_t &hashVal)
60{
61    std::lock_guard<std::mutex> lock(g_mapMutex);
62    for (auto it = g_hashMap.begin(); it != g_hashMap.end(); it++) {
63        if (it->second.busNum == info.busNum && it->second.devNum == info.devNum) {
64            hashVal = it->first;
65            return true;
66        }
67    }
68    return false;
69}