typedef BOOL()

in ambari-metrics-host-monitoring/src/main/python/psutil/psutil/_psutil_windows.c [451:515]
55 lines of code
11 McCabe index (conditional complexity)

typedef BOOL (WINAPI *LPFN_GLPI) (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION,
                                  PDWORD);

/*
 * Return the number of physical CPU cores.
 */
static PyObject *
psutil_cpu_count_phys(PyObject *self, PyObject *args)
{
    LPFN_GLPI glpi;
    DWORD rc;
    PSYSTEM_LOGICAL_PROCESSOR_INFORMATION buffer = NULL;
    PSYSTEM_LOGICAL_PROCESSOR_INFORMATION ptr = NULL;
    DWORD length = 0;
    DWORD offset = 0;
    int ncpus = 0;

    glpi = (LPFN_GLPI)GetProcAddress(GetModuleHandle(TEXT("kernel32")),
                                     "GetLogicalProcessorInformation");
    if (glpi == NULL)
        goto return_none;

    while (1) {
        rc = glpi(buffer, &length);
        if (rc == FALSE) {
            if (GetLastError() == ERROR_INSUFFICIENT_BUFFER) {
                if (buffer)
                    free(buffer);
                buffer = (PSYSTEM_LOGICAL_PROCESSOR_INFORMATION)malloc(
                    length);
                if (NULL == buffer) {
                    PyErr_NoMemory();
                    return NULL;
                }
            }
            else {
                goto return_none;
            }
        }
        else {
            break;
        }
    }

    ptr = buffer;
    while (offset + sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION) <= length) {
        if (ptr->Relationship == RelationProcessorCore)
            ncpus += 1;
        offset += sizeof(SYSTEM_LOGICAL_PROCESSOR_INFORMATION);
        ptr++;
    }

    free(buffer);
    if (ncpus == 0)
        goto return_none;
    else
        return Py_BuildValue("i", ncpus);

return_none:
    // mimic os.cpu_count()
    if (buffer != NULL)
        free(buffer);
    Py_INCREF(Py_None);
    return Py_None;
}