Crear proceso no funciona
-
22-07-2019 - |
Pregunta
Estoy creando un proceso y estoy haciendo una gran cantidad de objetos de kernel para el sistema. Mi código es que:
int main(){
//Cria processo para o Data Viewer Unit
LPSTARTUPINFOA si;
PROCESS_INFORMATION pi;
// Start the child process.
if(!CreateProcessA(
"E:\\Documents\\Faculdade\\Matérias\\Automação em Tempo Real\\TP 3\\DataViewerUnit\\Debug\\DataViewerUnit.exe", // Module name
NULL, // Command line
NULL, // Process handle not inheritable
NULL, // Thread handle not inheritable
FALSE, // Set handle inheritance to FALSE
CREATE_NEW_CONSOLE, // No creation flags
NULL, // Use parent's environment block
NULL, // Use parent's starting directory
si, // Pointer to STARTUPINFO structure
&pi ) // Pointer to PROCESS_INFORMATION structure
)
{
printf( "CreateProcess failed (%d).\n", GetLastError() );
return 0;
}
// Wait until child process exits.
WaitForSingleObject( pi.hProcess, INFINITE );
LOG("Traffic System initiating...");
LOG("Keyboard commands:\n"
"0 - Changes the system mode to manual.\n"
"1 - Changes the system mode to automatic.\n"
"Spacebar - Swaps between buffer lock and unlock.\n"
"ESC - Terminates the program."
);
system("PAUSE");
isAutoMode = TRUE;
terminate_progam = FALSE;
terminate_TOU = FALSE;
bufferSpace = BUFFER_SIZE;
InitializeCriticalSection(&bufferCS);
system("PAUSE");
hMailslot = CreateFile(MAILSLOT, GENERIC_WRITE, FILE_SHARE_READ,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
ASSERT(hMailslot, "Mailslot couldn't be created");
hHasPosition = CreateSemaphore(NULL, BUFFER_SIZE, BUFFER_SIZE,
(LPCWSTR)"HAS_POSITION");
ASSERT(hHasPosition, "Positions to write semaphore couldn't be created.");
hHasMsg = CreateSemaphore(NULL, 0, BUFFER_SIZE, (LPCWSTR)"HAS_MSG");
ASSERT(hHasMsg, "Messages to read semaphore couldn't be created.");
hBufferLockStatus = CreateEvent(NULL, true, true,
(LPCWSTR)"BUFFER_LOCK_STATUS");
ASSERT(hBufferLockStatus, "Lock status semaphore couldn't be created.");
hTimer = CreateSemaphore(NULL, 0, 1, (LPCWSTR)"REMOTE_UNITS_TIMER");
ASSERT(hTimer, "Timer semaphore couldn't be created.");
nextMsgToRead = 0;
nextPositionToWrite = 0;
for (int i = 0;i < RU_QUANTITY;i++) {
hRUs[i] = (HANDLE) _beginthreadex(NULL, 0, (CAST_FUNCTION)RUAction, (LPVOID)i, 0, NULL);
ASSERT(hRUs[i], "RU " << i << "could not be created.");
DEBUG("RU " << i << " created.");
RUTime[i] = generateTime(100, 200);
DEBUG("Remote Unit " << i << " interval: " <<
RUTime[i]);
}
HANDLE hTOU = (HANDLE) _beginthreadex(NULL, 0, (CAST_FUNCTION)TOUAction, NULL, 0, NULL);
ASSERT(hTOU, "Traffic Optimization Unit couldn't be created.");
bool isLocked = false;
int typed;
do{
typed = _getch();
switch(typed){
case CHAR0:
if(isAutoMode)
LOG("You changed the mode to manual.")
else
LOG("Mode is already manual.")
isAutoMode = false;
break;
case CHAR1:
if(!isAutoMode)
LOG("You changed the mode to automatic.")
else
LOG("Mode is already automatic.")
isAutoMode = true;
break;
case SPACEBAR :
if(isLocked){
isLocked = false;
SetEvent(hBufferLockStatus);
LOG("You unlocked the buffer.");
} else {
isLocked = true;
ResetEvent(hBufferLockStatus);
LOG("You locked the buffer.");
}
break;
Default:
break;
}
} while (typed!=ESC);
LOG("You typed ESC, the program will be finished.");
//Pede o fim das threads
terminate_progam = true;
// Importante para que as threads não fiquem
// travadas sem poder terminar.
SetEvent(hBufferLockStatus);
WaitForMultipleObjects(RU_QUANTITY, hRUs, TRUE, INFINITE);
terminate_TOU = true;
WaitForSingleObject(hTOU, INFINITE);
// Close process and thread handles.
CloseHandle(pi.hProcess);
CloseHandle(pi.hThread);
CloseHandle(hHasMsg);
CloseHandle(hHasPosition);
CloseHandle(hBufferLockStatus);
CloseHandle(hTimer);
return 0;
}
He comentado casi todo este código y el proceso de creación funciona bien. Cuando dejé más de 1 objeto del núcleo, el programa se detiene para ejecutarse y Windows Vista muestra un mensaje de "Este programa se detiene para ejecutarse ...". El otro proceso tiene solo una frase que dice algo ...
Me gustaría saber qué tiene de malo mi código. Saludos, Leandro Lima
Solución
Use zeromemory o memset e inicialice su ProcessInfo y StartupInfo
Esto es declarar un puntero a una estructura de información de inicio, declarar la estructura y pasarla por referencia LPSTARTUPINFOA si
set si.cb = sizeof (STARTUPINFO)
Algo como esto
PROCESS_INFORMATION PI;
STARTUPINFO SI;
SI.dwFlags = STARTF_USESTDHANDLES;
SI.cb = sizeof(STARTUPINFO);
char * sCommandLine = _strdup(sCommand.c_str());
if(!CreateProcess(NULL,sCommandLine,NULL,NULL,true,CREATE_NO_WINDOW,NULL,NULL,&SI,&PI))
Otros consejos
Estás pasando un puntero no inicializado a una estructura STARTUPINFO. Debe declarar una estructura STARTUPINFO, inicializar sus campos y pasarle un puntero.