_MCRTIMP uintptr_t __cdecl _beginthreadex (void *security,unsigned stacksize,unsigned (__CLR_OR_STD_CALL * initialcode) (void *),void * argument,unsigned createflag,unsigned *thrdaddr)
{_ptiddata ptd;                  /* pointer to per-thread data */uintptr_t thdl;                 /* thread handle */unsigned long err = 0L;     /* Return from GetLastError() */unsigned dummyid;               /* dummy returned thread ID *//* validation section */_VALIDATE_RETURN(initialcode != NULL, EINVAL, 0);/* Initialize FlsGetValue function pointer */__set_flsgetvalue();/** Allocate and initialize a per-thread data structure for the to-* be-created thread.*/if ( (ptd = (_ptiddata)_calloc_crt(1, sizeof(struct _tiddata))) == NULL )goto error_return;/** Initialize the per-thread data*/_initptd(ptd, _getptd()->ptlocinfo);ptd->_initaddr = (void *) initialcode;ptd->_initarg = argument;ptd->_thandle = (uintptr_t)(-1);#if defined (_M_CEE) || defined (MRTDLL)if(!_getdomain(&(ptd->__initDomain))){goto error_return;}
#endif  /* defined (_M_CEE) || defined (MRTDLL) *//** Make sure non-NULL thrdaddr is passed to CreateThread*/if ( thrdaddr == NULL )thrdaddr = &dummyid;/** Create the new thread using the parameters supplied by the caller.*/if ( (thdl = (uintptr_t)CreateThread( (LPSECURITY_ATTRIBUTES)security,stacksize,_threadstartex,(LPVOID)ptd,createflag,(LPDWORD)thrdaddr))== (uintptr_t)0 ){err = GetLastError();goto error_return;}/** Good return*/return(thdl);/** Error return*/
error_return:/** Either ptd is NULL, or it points to the no-longer-necessary block* calloc-ed for the _tiddata struct which should now be freed up.*/_free_crt(ptd);/** Map the error, if necessary.** Note: this routine returns 0 for failure, just like the Win32* API CreateThread, but _beginthread() returns -1 for failure.*/if ( err != 0L )_dosmaperr(err);return( (uintptr_t)0 );
}

static unsigned long WINAPI _threadstartex (void * ptd)
{_ptiddata _ptd;                  /* pointer to per-thread data *//* Initialize FlsGetValue function pointer */__set_flsgetvalue();/** Check if ptd is initialised during THREAD_ATTACH call to dll mains*/if ( ( _ptd = (_ptiddata)__fls_getvalue(__get_flsindex())) == NULL){/** Stash the pointer to the per-thread data stucture in TLS*/if ( !__fls_setvalue(__get_flsindex(), ptd) )ExitThread(GetLastError());/** Set the thread ID field -- parent thread cannot set it after* CreateThread() returns since the child thread might have run* to completion and already freed its per-thread data block!*/((_ptiddata) ptd)->_tid = GetCurrentThreadId();}else{_ptd->_initaddr = ((_ptiddata) ptd)->_initaddr;_ptd->_initarg =  ((_ptiddata) ptd)->_initarg;_ptd->_thandle =  ((_ptiddata) ptd)->_thandle;
#if defined (_M_CEE) || defined (MRTDLL)_ptd->__initDomain=((_ptiddata) ptd)->__initDomain;
#endif  /* defined (_M_CEE) || defined (MRTDLL) */_freefls(ptd);ptd = _ptd;}/** Call fp initialization, if necessary*/
#ifndef MRTDLL
#ifdef CRTDLL_fpclear();
#else  /* CRTDLL */if (_FPmtinit != NULL &&_IsNonwritableInCurrentImage((PBYTE)&_FPmtinit)){(*_FPmtinit)();}
#endif  /* CRTDLL */
#endif  /* MRTDLL */#if defined (_M_CEE) || defined (MRTDLL)DWORD domain=0;if(!_getdomain(&domain)){ExitThread(0);}if(domain!=_ptd->__initDomain){/* need to transition to caller's domain and startup there*/::msclr::call_in_appdomain(_ptd->__initDomain, _callthreadstartex);return 0L;}
#endif  /* defined (_M_CEE) || defined (MRTDLL) */_callthreadstartex();/** Never executed!*/return(0L);
}

static void _callthreadstartex(void)
{_ptiddata ptd;           /* pointer to thread's _tiddata struct *//* must always exist at this point */ptd = _getptd();/** Guard call to user code with a _try - _except statement to* implement runtime errors and signal support*/__try {_endthreadex (( (unsigned (__CLR_OR_STD_CALL 

*)(void *))(((_ptiddata)ptd)->_initaddr) ) ( ((_ptiddata)ptd)->

_initarg ) ) ;}__except ( _XcptFilter(GetExceptionCode(), GetExceptionInformation()) ){/** Should never reach here*/_exit( GetExceptionCode() );} /* end of _try - _except */}

void __cdecl _endthreadex (unsigned retcode)
{_ptiddata ptd;           /* pointer to thread's _tiddata struct *//** Call fp termination, if necessary*/
#ifdef CRTDLL_fpclear();
#else  /* CRTDLL */if (_FPmtterm != NULL &&_IsNonwritableInCurrentImage((PBYTE)&_FPmtterm)){(*_FPmtterm)();}
#endif  /* CRTDLL */ptd = _getptd_noexit();if (ptd) {/** Free up the _tiddata structure & its subordinate buffers*      _freeptd() will also clear the value for this thread*      of the FLS variable __flsindex.*/_freeptd(ptd);}/** Terminate the thread*/ExitThread(retcode);}