fastfetch/src/detection/cpu/cpu_windows.c

#include "cpu.h"
#include "detection/temps/temps_windows.h"
#include "util/windows/registry.h"
#include "util/mallocHelper.h"
#include "util/smbiosHelper.h"

// 7.5
typedef struct FFSmbiosProcessorInfo
{
    FFSmbiosHeader Header;

    uint8_t SocketDesignation; // string
    uint8_t ProcessorType; // enum
    uint8_t ProcessorFamily; // enum
    uint8_t ProcessorManufacturer; // string
    uint64_t ProcessorID; // varies
    uint8_t ProcessorVersion; // string
    uint8_t Voltage; // varies
    uint16_t ExternalClock; // varies
    uint16_t MaxSpeed; // varies
    uint16_t CurrentSpeed; // varies
    uint8_t Status; // varies
    uint8_t ProcessorUpgrade; // enum

    // 2.1+
    uint16_t L1CacheHandle; // varies
    uint16_t L2CacheHandle; // varies
    uint16_t L3CacheHandle; // varies

    // 2.3+
    uint8_t SerialNumber; // string
    uint8_t AssertTag; // string
    uint8_t PartNumber; // string

    // 2.5+
    uint8_t CoreCount; // varies
    uint8_t CoreEnabled; // varies
    uint8_t ThreadCount; // varies
    uint16_t ProcessorCharacteristics; // bit field

    // 2.6+
    uint16_t ProcessorFamily2; // enum

    // 3.0+
    uint16_t CoreCount2; // varies
    uint16_t CoreEnabled2; // varies
    uint16_t ThreadCount2; // varies

    // 3.6+
    uint16_t ThreadEnabled; // varies
} FFSmbiosProcessorInfo;

static const char* detectMaxSpeedBySmbios(FFCPUResult* cpu)
{
    const FFSmbiosProcessorInfo* data = (const FFSmbiosProcessorInfo*) (*ffGetSmbiosHeaderTable())[FF_SMBIOS_TYPE_PROCESSOR_INFO];

    if (!data)
        return "Processor information is not found in SMBIOS data";

    while (data->ProcessorType != 0x03 /*Central Processor*/ || (data->Status & 0b00000111) != 1 /*Enabled*/)
    {
        data = (const FFSmbiosProcessorInfo*) ffSmbiosNextEntry(&data->Header);
        if (data->Header.Type != FF_SMBIOS_TYPE_PROCESSOR_INFO)
            return "No active CPU is found in SMBIOS data";
    }

    double speed;
    if (data->MaxSpeed > 0 && data->MaxSpeed < 30000) // VMware reports weird values
        speed = data->MaxSpeed / 1000.0;
    else
        speed = data->CurrentSpeed / 1000.0;

    if (cpu->frequencyMax < speed)
        cpu->frequencyMax = speed;

    return NULL;
}

static const char* detectByOS(FFCPUResult* cpu)
{
    {
        DWORD length = 0;
        GetLogicalProcessorInformationEx(RelationAll, NULL, &length);
        if (length == 0)
            return "GetLogicalProcessorInformationEx(RelationAll, NULL, &length) failed";

        SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX* FF_AUTO_FREE
            pProcessorInfo = (SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX*)malloc(length);

        if (pProcessorInfo && GetLogicalProcessorInformationEx(RelationAll, pProcessorInfo, &length))
        {
            for(
                SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX* ptr = pProcessorInfo;
                (uint8_t*)ptr < ((uint8_t*)pProcessorInfo) + length;
                ptr = (SYSTEM_LOGICAL_PROCESSOR_INFORMATION_EX*)(((uint8_t*)ptr) + ptr->Size)
            )
            {
                if(ptr->Relationship == RelationProcessorCore)
                    ++cpu->coresPhysical;
                else if(ptr->Relationship == RelationGroup)
                {
                    cpu->coresOnline += ptr->Group.GroupInfo->ActiveProcessorCount;
                    cpu->coresLogical += ptr->Group.GroupInfo->MaximumProcessorCount;
                }
            }
        }
        else
            return "GetLogicalProcessorInformationEx(RelationAll, pProcessorInfo, &length) failed";
    }

    FF_HKEY_AUTO_DESTROY hKey = NULL;
    if(!ffRegOpenKeyForRead(HKEY_LOCAL_MACHINE, L"HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0", &hKey, NULL))
        return "ffRegOpenKeyForRead(HKEY_LOCAL_MACHINE, L\"HARDWARE\\DESCRIPTION\\System\\CentralProcessor\\0\", &hKey, NULL) failed";

    {
        uint32_t mhz;
        if(ffRegReadUint(hKey, L"~MHz", &mhz, NULL))
            cpu->frequencyMin = cpu->frequencyMax = mhz / 1000.0;
    }

    ffRegReadStrbuf(hKey, L"ProcessorNameString", &cpu->name, NULL);
    ffRegReadStrbuf(hKey, L"VendorIdentifier", &cpu->vendor, NULL);

    return NULL;
}

const char* ffDetectCPUImpl(const FFCPUOptions* options, FFCPUResult* cpu)
{
    const char* error = detectByOS(cpu);
    if (error)
        return error;

    if(options->temp)
        ffDetectSmbiosTemp(&cpu->temperature, NULL);

    detectMaxSpeedBySmbios(cpu);
    return NULL;
}