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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 "common.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,_T("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,_T("Performance"),0,KEY_QUERY_VALUE|KEY_SET_VALUE,&hKeyPerf)) {
dwDataSize=sizeof(DWORD);
if(!RegQueryValueEx(hKeyPerf,_T("Disable Performance Counters"),NULL,NULL,(BYTE*)&dwData,&dwDataSize))
if((dwData!=0)!=fDisable)
fSwitched=!RegSetValueEx(hKeyPerf,_T("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(_T("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(!lstrcmpiW(pwszInstanceName,(WCHAR*)((BYTE*)pPerfInstance+pPerfInstance->NameOffset)) || !pwszInstanceName) {
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 */
CopyMemory(&liPrevCounterValue,&liCurrentCounterValue,sizeof(LARGE_INTEGER));
CopyMemory(&liPrevPerfTime100nSec,&pPerfData->PerfTime100nSec,sizeof(LARGE_INTEGER));
}
/* uninit */
if(pPerfData) mir_free(pPerfData);
if(fSwitched) WinNT_PerfStatsSwitch(_T("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)
{
struct CpuUsageThreadParams *param;
DWORD idThread=0;
HANDLE hFirstEvent;
/* init params */
param=(struct CpuUsageThreadParams*)mir_alloc(sizeof(struct CpuUsageThreadParams));
if(param==NULL) return FALSE;
param->dwDelayMillis=dwDelayMillis;
param->pfnDataAvailProc=pfnDataAvailProc;
param->lParam=lParam;
param->pidThread=&idThread;
param->hFirstEvent=hFirstEvent=CreateEvent(NULL,FALSE,FALSE,NULL);
if(hFirstEvent==NULL) {
mir_free(param);
return 0;
}
/* start thread */
if((int)mir_forkthread(WinNT_PollThread, param) != -1)
WaitForSingleObject(hFirstEvent,INFINITE); /* wait for first success */
else
mir_free(param); /* thread not started */
CloseHandle(hFirstEvent);
return idThread;
}
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