/*
* Manual page at process.def
*/
INT32 CGEN_PUBLIC CProcess::Start()
{
const SMic* pMic = NULL; // Method invocation context of Start()
CFunction* iCaller = NULL; // Function calling Start()
CFunction* iFnc = NULL; // Process function
StkItm* pStkItm = NULL; // Stack item
INT32 nArgs = 0; // Number of process function arguments
// Validate and initialize // ------------------------------------
if (m_nState!=0) // Not virginal
return IERROR(this,PRC_CANTSTART,"multiple starts not allowed",0,0); // Forget it!
if (!(pMic = CDlpObject_MicGet(_this))) return -1; // Get method invocation context
iCaller = (CFunction*)CDlpObject_OfKind("function",pMic->iCaller); // Get calling CFunction
if (!iCaller) return -1; // Must be a function!
// Initialize process // ------------------------------------
sprintf(m_psTmpFile,"%s%ld",dlp_tempnam(NULL,"~dLabPro#process#"),(long)dlp_time());// Initialize temp. file name prefix
// Marshal arguments // ------------------------------------
if (!(pStkItm=iCaller->StackGet(0))) return IERROR(this,PRC_TOOFEWARGS,0,0,0);// Get stack top
if (pStkItm->nType==T_INSTANCE) // Stack top is an instance
iFnc = (CFunction*)CDlpObject_OfKind("function",pStkItm->val.i); // Get function to be called
if (iFnc) // This process is a function call
{ // >>
IFIELD_RESET(CDlpObject,"dto"); // Create data transfer object
nArgs = CData_GetNRecs(iFnc->m_idArg); // Get number of function arguments
Marshal(m_iDto,iCaller,nArgs); // Marshal arguments for transfer
} // <<
else // This process is a program call
dlp_strcpy(m_psCmdLine,iCaller->PopString(0)); // Get program command line
#ifdef USE_FORK
if (iFnc) // This process is a function call
{ // >>
m_hPid=fork(); // Fork the process
if(m_hPid>0){ // Parent process >>
m_nState |= PRC_DATASENT; // Remember data have been sent
m_nState |= PRC_RUNNING; // Set running flag
m_hThread = 0; // Clear thread handle
return O_K; // Everything is fine
} // <<
if(m_hPid==0) return DoJobFork(iCaller,iFnc); // The child process runs the function
return IERROR(this,PRC_CANTSTART,"fork() failed",0,0); // On error (fid<0) we return
} // <<
#endif
// Start job in watcher thread // ------------------------------------
m_hPid = 0; // Reset process id
SendData(); // Send transfer data
m_hThread = dlp_create_thread(DoJob,this); // Do the job and watch it
return O_K; // Yo!
}
/*
* Manual page at process.def
*/
INT16 CGEN_PUBLIC CProcess::MarshalRetval()
{
CDlpObject* iDto = NULL; // Data transfer object
const SMic* pMic = NULL; // Current method invocation context
CFunction* iCaller = NULL; // Calling function
StkItm* pStkItm = NULL; // Stack item to marshal
// Validate and initialize // ------------------------------------
if (!(pMic = CDlpObject_MicGet(_this))) return -1; // Get method invocation context
iCaller = (CFunction*)CDlpObject_OfKind("function",pMic->iCaller); // Get calling CFunction
if (!iCaller) return -1; // Must be a function!
// Pack second stack element into the CDlpObject on the stack top // ------------------------------------
iDto = iCaller->PopInstance(0); // Get instance on stack top
if (!iDto) return NOT_EXEC; // No instance on stack top --> puuh!
if (iCaller->StackGetLength()==0) return O_K; // Nothing more on the stack --> ok
pStkItm = iCaller->StackGet(0); // Get stack top
Pack(iDto,NULL,pStkItm,PRC_S_RETV); // Pack it as "~iRetv"
iCaller->Pop(0); // Remove stack top
return O_K; // Ok
}