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split into os, cpu, and gfx parts

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This was SVN commit r551.
This commit is contained in:
janwas 2004-06-19 14:30:55 +00:00
parent fa7d4991d6
commit 3c11f6e5d6
1 changed files with 0 additions and 85 deletions
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85
source/lib/sysdep/win/wdetect.cpp
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@ -214,88 +214,3 @@ int win_get_gfx_info()
return 0;
}
int win_get_cpu_info()
{
// get number of CPUs (can't fail)
SYSTEM_INFO si;
GetSystemInfo(&si);
cpus = si.dwNumberOfProcessors;
// read CPU frequency from registry
HKEY hKey;
const char* key = "HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0";
if(RegOpenKeyEx(HKEY_LOCAL_MACHINE, key, 0, KEY_QUERY_VALUE, &hKey) == 0)
{
DWORD freq_mhz;
DWORD size = sizeof(freq_mhz);
if(RegQueryValueEx(hKey, "~MHz", 0, 0, (LPBYTE)&freq_mhz, &size) == 0)
cpu_freq = freq_mhz * 1e6;
RegCloseKey(hKey);
}
// determine whether system is a laptop.
// (if SpeedStep detect below fails, guess SpeedStep <==> laptop)
HW_PROFILE_INFO hi;
GetCurrentHwProfile(&hi);
bool is_laptop = !(hi.dwDockInfo & DOCKINFO_DOCKED) ^
!(hi.dwDockInfo & DOCKINFO_UNDOCKED);
// both flags set <==> this is a desktop machine.
// both clear is unspecified; we assume it's not a laptop.
// NOTE: ! is necessary (converts expression to bool)
//
// check for speedstep
//
// CallNtPowerInformation
// (manual import because it's not supported on Win95)
NTSTATUS (WINAPI *pCNPI)(POWER_INFORMATION_LEVEL, PVOID, ULONG, PVOID, ULONG) = 0;
HMODULE hPowrprofDll = LoadLibrary("powrprof.dll");
*(void**)&pCNPI = GetProcAddress(hPowrprofDll, "CallNtPowerInformation");
if(pCNPI)
{
// most likely not speedstep-capable if these aren't supported
SYSTEM_POWER_CAPABILITIES spc;
if(pCNPI(SystemPowerCapabilities, 0, 0, &spc, sizeof(spc)) == STATUS_SUCCESS)
if(!spc.ProcessorThrottle || !spc.ThermalControl)
cpu_speedstep = 0;
// probably speedstep if cooling mode active.
// the documentation of PO_TZ_* is unclear, so we can't be sure.
SYSTEM_POWER_INFORMATION spi;
if(pCNPI(SystemPowerInformation, 0, 0, &spi, sizeof(spi)) == STATUS_SUCCESS)
if(spi.CoolingMode != PO_TZ_INVALID_MODE)
cpu_speedstep = 1;
// definitely speedstep if a CPU has thermal throttling active.
// note that we don't care about user-defined throttles
// (see ppi.CurrentMhz) - they don't change often.
ULONG ppi_buf_size = cpus * sizeof(PROCESSOR_POWER_INFORMATION);
void* ppi_buf = malloc(ppi_buf_size);
if(pCNPI(ProcessorInformation, 0, 0, ppi_buf, ppi_buf_size) == STATUS_SUCCESS)
{
PROCESSOR_POWER_INFORMATION* ppi = (PROCESSOR_POWER_INFORMATION*)ppi_buf;
for(int i = 0; i < cpus; i++)
// thermal throttling currently active
if(ppi[i].MaxMhz != ppi[i].MhzLimit)
{
cpu_speedstep = 1;
break;
}
}
free(ppi_buf);
// none of the above => don't know yet (for certain, at least).
if(cpu_speedstep == -1)
// guess speedstep active if on a laptop.
// ia32 code gets a second crack at it.
cpu_speedstep = (is_laptop)? 1 : 0;
}
FreeLibrary(hPowrprofDll);
// this is most likely the only reference,
// so don't free it (=> unload) until done with the DLL.
return 0;
}