1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
|
/*
* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "webrtc/system_wrappers/interface/cpu_info.h"
#if defined(_WIN32)
#include <Windows.h>
#elif defined(WEBRTC_MAC)
#include <sys/sysctl.h>
#include <sys/types.h>
#else // defined(WEBRTC_LINUX) or defined(WEBRTC_ANDROID)
#include <unistd.h>
#endif
#include "webrtc/system_wrappers/interface/trace.h"
namespace webrtc {
uint32_t CpuInfo::number_of_cores_ = 0;
uint32_t CpuInfo::DetectNumberOfCores() {
if (!number_of_cores_) {
#if defined(_WIN32)
SYSTEM_INFO si;
GetSystemInfo(&si);
number_of_cores_ = static_cast<uint32_t>(si.dwNumberOfProcessors);
WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1,
"Available number of cores:%d", number_of_cores_);
#elif defined(WEBRTC_LINUX) || defined(WEBRTC_ANDROID)
number_of_cores_ = static_cast<uint32_t>(sysconf(_SC_NPROCESSORS_ONLN));
WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1,
"Available number of cores:%d", number_of_cores_);
#elif defined(WEBRTC_MAC)
int name[] = {CTL_HW, HW_AVAILCPU};
int ncpu;
size_t size = sizeof(ncpu);
if (0 == sysctl(name, 2, &ncpu, &size, NULL, 0)) {
number_of_cores_ = static_cast<uint32_t>(ncpu);
WEBRTC_TRACE(kTraceStateInfo, kTraceUtility, -1,
"Available number of cores:%d", number_of_cores_);
} else {
WEBRTC_TRACE(kTraceError, kTraceUtility, -1,
"Failed to get number of cores");
number_of_cores_ = 1;
}
#else
WEBRTC_TRACE(kTraceWarning, kTraceUtility, -1,
"No function to get number of cores");
number_of_cores_ = 1;
#endif
}
return number_of_cores_;
}
} // namespace webrtc
|
