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/*
'AutoShutdown'-Plugin for Miranda IM
Copyright 2004-2007 H. Herkenrath
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program (Shutdown-License.txt); if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "stdafx.h"
/************************* Stat Switch ********************************/
#define Li2Double(x) ((double)((x).HighPart)*4.294967296E9+(double)((x).LowPart))
static BOOL WinNT_PerfStatsSwitch(TCHAR *pszServiceName, BOOL fDisable)
{
HKEY hKeyServices, hKeyService, hKeyPerf;
DWORD dwData, dwDataSize;
BOOL fSwitched = FALSE;
/* Win2000+ */
if (!RegOpenKeyEx(HKEY_LOCAL_MACHINE, L"System\\CurrentControlSet\\Services", 0, KEY_QUERY_VALUE | KEY_SET_VALUE, &hKeyServices)) {
if (!RegOpenKeyEx(hKeyServices, pszServiceName, 0, KEY_QUERY_VALUE | KEY_SET_VALUE, &hKeyService)) {
if (!RegOpenKeyEx(hKeyService, L"Performance", 0, KEY_QUERY_VALUE | KEY_SET_VALUE, &hKeyPerf)) {
dwDataSize = sizeof(DWORD);
if (!RegQueryValueEx(hKeyPerf, L"Disable Performance Counters", NULL, NULL, (BYTE*)&dwData, &dwDataSize))
if ((dwData != 0) != fDisable)
fSwitched = !RegSetValueEx(hKeyPerf, L"Disable Performance Counters", 0, REG_DWORD, (BYTE*)&fDisable, dwDataSize);
RegCloseKey(hKeyPerf);
}
RegCloseKey(hKeyService);
}
RegCloseKey(hKeyServices);
}
return fSwitched;
}
/************************* Poll Thread ********************************/
struct CpuUsageThreadParams
{
DWORD dwDelayMillis;
CPUUSAGEAVAILPROC pfnDataAvailProc;
LPARAM lParam;
HANDLE hFirstEvent;
DWORD *pidThread;
};
static BOOL CallBackAndWait(struct CpuUsageThreadParams *param, BYTE nCpuUsage)
{
if (param->hFirstEvent != NULL) {
/* return value for PollCpuUsage() */
*param->pidThread = GetCurrentThreadId();
SetEvent(param->hFirstEvent);
param->hFirstEvent = NULL;
/* lower priority after first call */
SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_IDLE);
}
if (!param->pfnDataAvailProc(nCpuUsage, param->lParam)) return FALSE;
SleepEx(param->dwDelayMillis, TRUE);
return !Miranda_Terminated();
}
static void WinNT_PollThread(void *vparam)
{
CpuUsageThreadParams *param = (CpuUsageThreadParams*)vparam;
DWORD dwBufferSize = 0, dwCount;
BYTE *pBuffer = NULL;
PERF_DATA_BLOCK *pPerfData = NULL;
LONG res, lCount;
PERF_OBJECT_TYPE *pPerfObj;
PERF_COUNTER_DEFINITION *pPerfCounter;
PERF_INSTANCE_DEFINITION *pPerfInstance;
PERF_COUNTER_BLOCK *pPerfCounterBlock;
DWORD dwObjectId, dwCounterId;
WCHAR wszValueName[11], *pwszInstanceName;
BYTE nCpuUsage;
BOOL fSwitched, fFound, fIsFirst = FALSE;
LARGE_INTEGER liPrevCounterValue = { 0 }, liCurrentCounterValue = { 0 }, liPrevPerfTime100nSec = { 0 };
/* init */
dwObjectId = 238; /*'Processor' object */
dwCounterId = 6; /* '% processor time' counter */
pwszInstanceName = L"_Total"; /* '_Total' instance */
_itot_s(dwObjectId, wszValueName, 10);
fSwitched = WinNT_PerfStatsSwitch(L"PerfOS", FALSE);
/* poll */
for (;;) {
/* retrieve data for given object */
res = RegQueryValueExW(HKEY_PERFORMANCE_DATA, wszValueName, NULL, NULL, (BYTE*)pPerfData, &dwBufferSize);
while (!pBuffer || res == ERROR_MORE_DATA) {
pBuffer = (BYTE*)mir_realloc(pPerfData, dwBufferSize += 256);
if (!pBuffer) break;
pPerfData = (PERF_DATA_BLOCK*)pBuffer;
res = RegQueryValueExW(HKEY_PERFORMANCE_DATA, wszValueName, NULL, NULL, pBuffer, &dwBufferSize);
}
if (res != ERROR_SUCCESS) break;
/* find object in data */
fFound = FALSE;
/* first object */
pPerfObj = (PERF_OBJECT_TYPE*)((BYTE*)pPerfData + pPerfData->HeaderLength);
for (dwCount = 0; dwCount < pPerfData->NumObjectTypes; ++dwCount) {
if (pPerfObj->ObjectNameTitleIndex == dwObjectId) {
/* find counter in object data */
/* first counter */
pPerfCounter = (PERF_COUNTER_DEFINITION*)((BYTE*)pPerfObj + pPerfObj->HeaderLength);
for (dwCount = 0; dwCount < (pPerfObj->NumCounters); ++dwCount) {
if (pPerfCounter->CounterNameTitleIndex == dwCounterId) {
/* find instance in counter data */
if (pPerfObj->NumInstances == PERF_NO_INSTANCES) {
pPerfCounterBlock = (PERF_COUNTER_BLOCK*)((BYTE*)pPerfObj + pPerfObj->DefinitionLength);
liCurrentCounterValue = *(LARGE_INTEGER*)((BYTE*)pPerfCounterBlock + pPerfCounter->CounterOffset);
fFound = TRUE;
}
else {
/* first instance */
pPerfInstance = (PERF_INSTANCE_DEFINITION*)((BYTE*)pPerfObj + pPerfObj->DefinitionLength);
for (lCount = 0; lCount < (pPerfObj->NumInstances); ++lCount) {
pPerfCounterBlock = (PERF_COUNTER_BLOCK*)((BYTE*)pPerfInstance + pPerfInstance->ByteLength);
if (!mir_wstrcmpi(pwszInstanceName, (WCHAR*)((BYTE*)pPerfInstance + pPerfInstance->NameOffset))) {
liCurrentCounterValue = *(LARGE_INTEGER*)((BYTE*)pPerfCounterBlock + pPerfCounter->CounterOffset);
fFound = TRUE;
break;
}
/* next instance */
pPerfInstance = (PPERF_INSTANCE_DEFINITION)((BYTE*)pPerfCounterBlock + pPerfCounterBlock->ByteLength);
}
}
break;
}
/* next counter */
pPerfCounter = (PERF_COUNTER_DEFINITION*)((BYTE*)pPerfCounter + pPerfCounter->ByteLength);
}
break;
}
/* next object */
pPerfObj = (PERF_OBJECT_TYPE*)((BYTE*)pPerfObj + pPerfObj->TotalByteLength);
}
if (!fFound)
break;
/* calc val from data, we need two samplings
* counter type: PERF_100NSEC_TIMER_INV
* calc: time base=100Ns, value=100*(1-(data_diff)/(100NsTime_diff)) */
if (!fIsFirst) {
nCpuUsage = (BYTE)((1.0 - (Li2Double(liCurrentCounterValue) - Li2Double(liPrevCounterValue)) / (Li2Double(pPerfData->PerfTime100nSec) - Li2Double(liPrevPerfTime100nSec)))*100.0 + 0.5);
if (!CallBackAndWait(param, nCpuUsage))
break;
}
else fIsFirst = FALSE;
/* store current sampling for next */
memcpy(&liPrevCounterValue, &liCurrentCounterValue, sizeof(LARGE_INTEGER));
memcpy(&liPrevPerfTime100nSec, &pPerfData->PerfTime100nSec, sizeof(LARGE_INTEGER));
}
/* uninit */
if (pPerfData)
mir_free(pPerfData);
if (fSwitched)
WinNT_PerfStatsSwitch(L"PerfOS", TRUE);
/* return error for PollCpuUsage() if never succeeded */
if (param->hFirstEvent != NULL)
SetEvent(param->hFirstEvent);
mir_free(param);
}
/************************* Start Thread *******************************/
// returns poll thread id on success
DWORD PollCpuUsage(CPUUSAGEAVAILPROC pfnDataAvailProc, LPARAM lParam, DWORD dwDelayMillis)
{
DWORD idThread = 0;
/* init params */
CpuUsageThreadParams *param = (struct CpuUsageThreadParams*)mir_alloc(sizeof(struct CpuUsageThreadParams));
if (param == NULL)
return FALSE;
HANDLE hFirstEvent = CreateEvent(NULL, FALSE, FALSE, NULL);
if (hFirstEvent == NULL) {
mir_free(param);
return FALSE;
}
param->dwDelayMillis = dwDelayMillis;
param->pfnDataAvailProc = pfnDataAvailProc;
param->lParam = lParam;
param->pidThread = &idThread;
param->hFirstEvent = hFirstEvent;
/* start thread */
if (mir_forkthread(WinNT_PollThread, param) != INVALID_HANDLE_VALUE)
WaitForSingleObject(hFirstEvent, INFINITE); /* wait for first success */
else
mir_free(param); /* thread not started */
CloseHandle(hFirstEvent);
return idThread;
}
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