int init_perf_collector(int multithreaded)
{
const char *__function_name = "init_perf_collector";
int ret = FAIL;
zabbix_log(LOG_LEVEL_DEBUG, "In %s()", __function_name);
if (0 != multithreaded)
{
if (ZBX_MUTEX_ERROR == zbx_mutex_create_force(&perfstat_access, ZBX_MUTEX_PERFSTAT))
{
zbx_error("cannot create mutex for performance counters");
exit(EXIT_FAILURE);
}
}
if (ERROR_SUCCESS != zbx_PdhOpenQuery(__function_name, &ppsd.pdh_query))
goto out;
ppsd.nextcheck = time(NULL) + UNSUPPORTED_REFRESH_PERIOD;
ret = SUCCEED;
out:
zabbix_log(LOG_LEVEL_DEBUG, "End of %s():%s", __function_name, zbx_result_string(ret));
return ret;
}
/******************************************************************************
* *
* Comments: Get the value of a counter. If it is a rate counter, *
* sleep 1 second to get the second raw value. *
* *
******************************************************************************/
PDH_STATUS calculate_counter_value(const char *function, const char *counterpath, double *value)
{
PDH_HQUERY query;
PDH_HCOUNTER handle = NULL;
PDH_STATUS pdh_status;
PDH_RAW_COUNTER rawData, rawData2;
PDH_FMT_COUNTERVALUE counterValue;
if (ERROR_SUCCESS != (pdh_status = zbx_PdhOpenQuery(function, &query)))
return pdh_status;
if (ERROR_SUCCESS != (pdh_status = zbx_PdhAddCounter(function, NULL, query, counterpath, &handle)))
goto close_query;
if (ERROR_SUCCESS != (pdh_status = zbx_PdhCollectQueryData(function, counterpath, query)))
goto remove_counter;
if (ERROR_SUCCESS != (pdh_status = zbx_PdhGetRawCounterValue(function, counterpath, handle, &rawData)))
goto remove_counter;
if (PDH_CSTATUS_INVALID_DATA == (pdh_status = PdhCalculateCounterFromRawValue(handle, PDH_FMT_DOUBLE |
PDH_FMT_NOCAP100, &rawData, NULL, &counterValue)))
{
/* some (e.g., rate) counters require two raw values, MSDN lacks documentation */
/* about what happens but tests show that PDH_CSTATUS_INVALID_DATA is returned */
zbx_sleep(1);
if (ERROR_SUCCESS == (pdh_status = zbx_PdhCollectQueryData(function, counterpath, query)) &&
ERROR_SUCCESS == (pdh_status = zbx_PdhGetRawCounterValue(function, counterpath,
handle, &rawData2)))
{
pdh_status = PdhCalculateCounterFromRawValue(handle, PDH_FMT_DOUBLE | PDH_FMT_NOCAP100,
&rawData2, &rawData, &counterValue);
}
}
if (ERROR_SUCCESS != pdh_status || (PDH_CSTATUS_VALID_DATA != counterValue.CStatus &&
PDH_CSTATUS_NEW_DATA != counterValue.CStatus))
{
if (ERROR_SUCCESS == pdh_status)
pdh_status = counterValue.CStatus;
zabbix_log(LOG_LEVEL_DEBUG, "%s(): cannot calculate counter value '%s': %s",
function, counterpath, strerror_from_module(pdh_status, L"PDH.DLL"));
}
else
{
*value = counterValue.doubleValue;
}
remove_counter:
PdhRemoveCounter(handle);
close_query:
PdhCloseQuery(query);
return pdh_status;
}