#include <string>
#include <errno.h>
#include <assert.h>
+#define _WIN32_DCOM
+#include <comdef.h>
+#include <Wbemidl.h>
+
+#pragma comment(lib, "wbemuuid.lib")
+#pragma comment(lib, "comsuppwd.lib")
#pragma comment(lib, "winmm.lib")
using namespace std;
#include <mmsystem.h>
+IWbemLocator *pLoc = NULL;
+IWbemServices *pSvc = NULL;
+
/* This MUST remain static and delcared outside the class, so that WriteProcessMemory can reference it properly */
static DWORD owner_processid = 0;
DWORD mstime = timeGetTime();
tv->tv_sec = time(NULL);
tv->tv_usec = (mstime - (tv->tv_sec * 1000)) * 1000;
- return 0;
+ return 0;
+}
+
+/* Initialise WMI. Microsoft have the silliest ideas about easy ways to
+ * obtain the CPU percentage of a running process!
+ * The whole API for this uses evil DCOM and is entirely unicode, giving
+ * all results and accepting queries as wide strings.
+ */
+bool initwmi()
+{
+ HRESULT hres;
+
+ /* Initialise COM. This can kill babies. */
+ hres = CoInitializeEx(0, COINIT_MULTITHREADED);
+ if (FAILED(hres))
+ return false;
+
+ /* COM security. This stuff kills kittens */
+ hres = CoInitializeSecurity(NULL, -1, NULL, NULL, RPC_C_AUTHN_LEVEL_DEFAULT,
+ RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE, NULL);
+
+ if (FAILED(hres))
+ {
+ CoUninitialize();
+ return false;
+ }
+
+ /* Instance to COM object */
+ pLoc = NULL;
+ hres = CoCreateInstance(CLSID_WbemLocator, 0, CLSCTX_INPROC_SERVER, IID_IWbemLocator, (LPVOID*)&pLoc);
+
+ if (FAILED(hres))
+ {
+ CoUninitialize();
+ return false;
+ }
+
+ pSvc = NULL;
+
+ /* Connect to DCOM server */
+ hres = pLoc->ConnectServer(_bstr_t(L"ROOT\\CIMV2"), NULL, NULL, 0, NULL, 0, 0, &pSvc);
+
+ /* That didn't work, maybe no kittens found to kill? */
+ if (FAILED(hres))
+ {
+ pLoc->Release();
+ CoUninitialize();
+ return false;
+ }
+
+ /* Don't even ASK what this does. I'm still not too sure myself. */
+ hres = CoSetProxyBlanket(pSvc, RPC_C_AUTHN_WINNT, RPC_C_AUTHZ_NONE, NULL, RPC_C_AUTHN_LEVEL_CALL,
+ RPC_C_IMP_LEVEL_IMPERSONATE, NULL, EOAC_NONE);
+
+ if (FAILED(hres))
+ {
+ pSvc->Release();
+ pLoc->Release();
+ CoUninitialize();
+ return false;
+ }
+ return true;
+}
+
+void donewmi()
+{
+ pSvc->Release();
+ pLoc->Release();
+ CoUninitialize();
+}
+
+/* Return the CPU usage in percent of this process */
+int getcpu()
+{
+ HRESULT hres;
+
+ /* Use WQL, similar to SQL, to construct a query that lists the cpu usage and pid of all processes */
+ IEnumWbemClassObject* pEnumerator = NULL;
+ hres = pSvc->ExecQuery(bstr_t("WQL"),
+ bstr_t("Select PercentProcessorTime,IDProcess from Win32_PerfFormattedData_PerfProc_Process"),
+ WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &pEnumerator);
+
+ /* Query didn't work */
+ if (FAILED(hres))
+ return -1;
+
+ IWbemClassObject *pclsObj = NULL;
+ ULONG uReturn = 0;
+
+ /* Iterate the query results */
+ while (pEnumerator)
+ {
+ VARIANT vtProp;
+ /* Next item */
+ HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &uReturn);
+
+ /* No more items left */
+ if (uReturn == 0)
+ break;
+
+ /* Find process ID */
+ hr = pclsObj->Get(L"IDProcess", 0, &vtProp, 0, 0);
+ if (!FAILED(hr))
+ {
+ /* Matches our process ID? */
+ if (vtProp.uintVal == GetCurrentProcessId())
+ {
+ VariantClear(&vtProp);
+ /* Get CPU percentage for this process */
+ hr = pclsObj->Get(L"PercentProcessorTime", 0, &vtProp, 0, 0);
+ if (!FAILED(hr))
+ {
+ /* Deal with wide string ickyness. Who in their right
+ * mind puts a number in a bstrVal wide string item?!
+ */
+ VariantClear(&vtProp);
+ int cpu = 0;
+ std::wstringstream out(vtProp.bstrVal);
+ out >> cpu;
+ pEnumerator->Release();
+ pclsObj->Release();
+ return cpu;
+ }
+ }
+ }
+ }
+ pEnumerator->Release();
+ pclsObj->Release();
+ return -1;
+}
+
+void usleep(unsigned long usecs)
+{
+ if (usecs > 0UL)
+ {
+ unsigned long millis = ((usecs + 999UL) / 1000UL);
+ SleepEx(millis, false);
+ }
}