rainmeter-studio/Plugins/PluginProcess/PluginProcess.cpp

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/*
Copyright (C) 2011 Birunthan Mohanathas
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; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include <windows.h>
#include <Psapi.h>
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#include <algorithm>
#include <vector>
#include "../../Library/RawString.h"
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#include "../../Library/Export.h" // Rainmeter's exported functions
#include "../../Library/DisableThreadLibraryCalls.h" // contains DllMain entry point
struct MeasureData
{
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CRawString processName;
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bool isRunning;
MeasureData() : isRunning(false) {}
};
static UINT g_UpdateCount = 0;
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static std::vector<MeasureData*> g_Measures;
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void CheckProcesses();
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PLUGIN_EXPORT void Initialize(void** data)
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{
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MeasureData* measure = new MeasureData;
g_Measures.push_back(measure);
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*data = measure;
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}
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PLUGIN_EXPORT void Reload(void* data, void* rm, double* maxValue)
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{
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MeasureData* measure = (MeasureData*)data;
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LPCWSTR value = RmReadString(rm, L"ProcessName", L"");
measure->processName = value;
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}
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PLUGIN_EXPORT double Update(void* data)
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{
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MeasureData* measure = (MeasureData*)data;
// Updates the measure only once per combined updates of all measures
++g_UpdateCount;
if (g_UpdateCount >= g_Measures.size())
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{
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CheckProcesses();
g_UpdateCount = 0;
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}
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return measure->isRunning ? 1.0 : -1.0;
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}
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PLUGIN_EXPORT void Finalize(void* data)
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{
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MeasureData* measure = (MeasureData*)data;
std::vector<MeasureData*>::iterator iter = std::find(g_Measures.begin(), g_Measures.end(), measure);
g_Measures.erase(iter);
delete measure;
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}
void CheckProcesses()
{
// Set everything to false
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std::vector<MeasureData*>::iterator iter = g_Measures.begin();
for ( ; iter != g_Measures.end(); ++iter)
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{
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(*iter)->isRunning = false;
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}
int bufSize = 256;
DWORD* pids = new DWORD[bufSize];
DWORD bytesReturned = 0;
while (!EnumProcesses(pids, bufSize * sizeof(DWORD), &bytesReturned) &&
bytesReturned == bufSize * sizeof(DWORD))
{
delete [] pids;
bufSize *= 2;
pids = new DWORD[bufSize];
}
for (UINT i = 0, isize = bytesReturned / sizeof(DWORD); i < isize; ++i)
{
const DWORD flags = PROCESS_QUERY_INFORMATION | PROCESS_VM_READ;
HANDLE hProcess = OpenProcess(flags, FALSE, pids[i]);
if (hProcess)
{
WCHAR buffer[MAX_PATH];
if (GetModuleBaseName(hProcess, NULL, buffer, _countof(buffer)))
{
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iter = g_Measures.begin();
for ( ; iter != g_Measures.end(); ++iter)
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{
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if (_wcsicmp(buffer, (*iter)->processName.c_str()) == 0)
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{
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(*iter)->isRunning = true;
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}
}
}
CloseHandle(hProcess);
}
}
delete [] pids;
}