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Use sysctlbyname

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kd-11 2024-08-25 15:39:05 +03:00 committed by kd-11
parent 8c64192ac7
commit f367703574
1 changed files with 21 additions and 41 deletions
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62
rpcs3/Emu/CPU/Backends/AArch64/AArch64Common.cpp
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@ -4,6 +4,10 @@
#include <thread>
#include <map>
#if defined(__APPLE__)
#include <sys/sysctl.h>
#endif
namespace aarch64
{
#if !defined(__APPLE__)
@ -196,59 +200,35 @@ namespace aarch64
return result;
}
#else
// Sysctl wrappers. Maybe should be moved somewhere else later.
static std::pair<int, std::string> cli_exec(const std::string_view& command)
{
std::array<char, 128> buffer; // iobuf for stdout
std::string result; // accumulated output
int exit_code = -1;
// Invoke command, stream result over pipe
FILE* pipe = ::popen(command.data(), "r");
if (!pipe)
{
return { exit_code, result };
}
// Accumulate stdout buffer
while (true)
{
memset(buffer.data(), 0, buffer.size());
if (!::fgets(buffer.data(), buffer.size(), pipe))
{
break;
}
result += buffer.data();
}
// Grab exit code. This is not really definitive but should be good enough to detect problems.
exit_code = ::pclose(pipe);
// Return the output and exit code
return { exit_code, result };
}
static std::string sysctl_s(const std::string_view& variable_name)
{
const auto command = fmt::format("sysctl -n %s", variable_name);
const auto [exit_code, result] = cli_exec(command);
if (exit_code != 0)
// Determine required buffer size
size_t length = 0;
if (sysctlbyname(variable_name.data(), nullptr, &length, nullptr, 0) == -1)
{
return {};
return "";
}
return fmt::trim(result, "\n\t ");
// Allocate space for the variable.
std::vector<char> text(length + 1);
text[length] = 0;
if (sysctlbyname(variable_name.data(), text.data(), &length, nullptr, 0) == -1)
{
return "";
}
return text.data();
}
static u64 sysctl_u64(const std::string_view& variable_name)
{
const auto value = sysctl_s(variable_name);
if (value.empty())
u64 value = 0;
size_t data_len = sizeof(value);
if (sysctlbyname(variable_name.data(), &value, &data_len, nullptr, 0) == -1)
{
return umax;
}
return std::stoull(value, nullptr, 16);
return value;
}
// We can get the brand name from sysctl directly