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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /third_party/libwebrtc/system_wrappers/source/cpu_info.cc | |
parent | Initial commit. (diff) | |
download | firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.tar.xz firefox-esr-36d22d82aa202bb199967e9512281e9a53db42c9.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'third_party/libwebrtc/system_wrappers/source/cpu_info.cc')
-rw-r--r-- | third_party/libwebrtc/system_wrappers/source/cpu_info.cc | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/third_party/libwebrtc/system_wrappers/source/cpu_info.cc b/third_party/libwebrtc/system_wrappers/source/cpu_info.cc new file mode 100644 index 0000000000..94aed09c48 --- /dev/null +++ b/third_party/libwebrtc/system_wrappers/source/cpu_info.cc @@ -0,0 +1,72 @@ +/* + * 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 "system_wrappers/include/cpu_info.h" + +#if defined(WEBRTC_WIN) +#include <windows.h> +#elif defined(WEBRTC_LINUX) || defined(WEBRTC_BSD) +#include <unistd.h> +#elif defined(WEBRTC_MAC) +#include <sys/sysctl.h> +#elif defined(WEBRTC_FUCHSIA) +#include <zircon/syscalls.h> +#endif + +#include "rtc_base/logging.h" + +namespace internal { +static int DetectNumberOfCores() { + int number_of_cores; + +#if defined(WEBRTC_WIN) + SYSTEM_INFO si; + GetNativeSystemInfo(&si); + number_of_cores = static_cast<int>(si.dwNumberOfProcessors); +#elif defined(WEBRTC_LINUX) || defined(WEBRTC_ANDROID) || defined(WEBRTC_BSD) + number_of_cores = static_cast<int>(sysconf(_SC_NPROCESSORS_ONLN)); + if (number_of_cores <= 0) { + RTC_LOG(LS_ERROR) << "Failed to get number of cores"; + number_of_cores = 1; + } +#elif defined(WEBRTC_MAC) || defined(WEBRTC_IOS) + int name[] = {CTL_HW, HW_AVAILCPU}; + size_t size = sizeof(number_of_cores); + if (0 != sysctl(name, 2, &number_of_cores, &size, NULL, 0)) { + RTC_LOG(LS_ERROR) << "Failed to get number of cores"; + number_of_cores = 1; + } +#elif defined(WEBRTC_FUCHSIA) + number_of_cores = zx_system_get_num_cpus(); +#else + RTC_LOG(LS_ERROR) << "No function to get number of cores"; + number_of_cores = 1; +#endif + + RTC_LOG(LS_INFO) << "Available number of cores: " << number_of_cores; + + RTC_CHECK_GT(number_of_cores, 0); + return number_of_cores; +} +} // namespace internal + +namespace webrtc { + +uint32_t CpuInfo::DetectNumberOfCores() { + // Statically cache the number of system cores available since if the process + // is running in a sandbox, we may only be able to read the value once (before + // the sandbox is initialized) and not thereafter. + // For more information see crbug.com/176522. + static const uint32_t logical_cpus = + static_cast<uint32_t>(internal::DetectNumberOfCores()); + return logical_cpus; +} + +} // namespace webrtc |