1 /*
2  * Copyright (c) 2020-2021 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 
16 #include "hal_cpu.h"
17 #ifdef _WIN32
18 #include <windows.h>
19 #elif defined __LINUX__
20 #include <unistd.h>
21 #endif
22 
23 #ifdef __cplusplus
24 #if __cplusplus
25 extern "C" {
26 #endif
27 #endif
28 
HalGetCpuCoreNum()29 uint32_t HalGetCpuCoreNum()
30 {
31     static uint32_t cpuCoreNum = 0;
32     if (cpuCoreNum) {
33         return cpuCoreNum;
34     }
35 #ifdef _WIN32
36     SYSTEM_INFO sysInfo;
37     GetSystemInfo(&sysInfo);
38     cpuCoreNum = sysInfo.dwNumberOfProcessors;
39 #elif defined __LINUX__
40     cpuCoreNum = sysconf(_SC_NPROCESSORS_ONLN);
41 #elif ((defined (HAL_CPU_NUM)) && (HAL_CPU_NUM < 8))
42     cpuCoreNum = HAL_CPU_NUM;
43 #else
44     cpuCoreNum = 1;
45 #endif
46     return cpuCoreNum;
47 }
48 
49 #ifdef __cplusplus
50 #if __cplusplus
51 }
52 #endif /* __cplusplus */
53 #endif /* __cplusplus */
54