mirror of
https://github.com/FEX-Emu/FEX.git
synced 2026-10-06 15:00:17 +02:00
40 lines
905 B
C++
40 lines
905 B
C++
// SPDX-License-Identifier: MIT
|
|
#include <FEXHeaderUtils/Filesystem.h>
|
|
|
|
#include <fmt/compile.h>
|
|
#include <fmt/format.h>
|
|
|
|
#include <cstddef>
|
|
#include <cstdint>
|
|
#ifdef _WIN32
|
|
#include <thread>
|
|
#else
|
|
#include <linux/limits.h>
|
|
#endif
|
|
|
|
namespace FEX::CPUInfo {
|
|
#ifndef _WIN32
|
|
uint32_t CalculateNumberOfCPUs() {
|
|
constexpr auto parse_string = FMT_COMPILE("/sys/devices/system/cpu/cpu{}");
|
|
constexpr auto max_parse_size = ::fmt::formatted_size(parse_string, UINT32_MAX);
|
|
char Tmp[max_parse_size];
|
|
size_t CPUs = 1;
|
|
|
|
for (;; ++CPUs) {
|
|
auto Size = fmt::format_to_n(Tmp, max_parse_size, parse_string, CPUs);
|
|
Tmp[Size.size] = 0;
|
|
if (!FHU::Filesystem::Exists(Tmp)) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
return CPUs;
|
|
}
|
|
#else
|
|
uint32_t CalculateNumberOfCPUs() {
|
|
// May not return correct number of cores if some are parked.
|
|
return std::thread::hardware_concurrency();
|
|
}
|
|
#endif
|
|
} // namespace FEX::CPUInfo
|