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/*
* create.c
*
* Description:
* This translation unit implements routines associated with spawning a new
* thread.
*/
#include "pthread.h"
#include "implement.h"
/*
* Code contributed by John E. Bossom <JEB>.
*/
int
pthread_create (pthread_t * tid,
const pthread_attr_t * attr,
void *(*start) (void *),
void *arg)
/*
* ------------------------------------------------------
* DOCPUBLIC
* This function creates a thread running the start function,
* passing it the parameter value, 'arg'.
*
* PARAMETERS
* tid
* pointer to an instance of pthread_t
*
* attr
* optional pointer to an instance of pthread_attr_t
*
* start
* pointer to the starting routine for the new thread
*
* arg
* optional parameter passed to 'start'
*
*
* DESCRIPTION
* This function creates a thread running the start function,
* passing it the parameter value, 'arg'. The 'attr'
* argument specifies optional creation attributes.
* The thread is identity of the new thread is returned
* as 'tid'
*
* RESULTS
* 0 successfully created thread,
* EINVAL attr invalid,
* EAGAIN insufficient resources.
*
* ------------------------------------------------------
*/
{
pthread_t thread;
int result = EAGAIN;
int run = TRUE;
ThreadParms *parms;
long stackSize;
if ((thread = (pthread_t) calloc (1, sizeof (*thread))) ==
NULL)
{
goto FAIL0;
}
thread->cancelEvent =
CreateEvent (
0,
(int) TRUE, /* manualReset */
(int) FALSE, /* setSignaled */
NULL);
if (thread->cancelEvent == NULL)
{
goto FAIL0;
}
if ((parms = (ThreadParms *) malloc (sizeof (*parms))) ==
NULL)
{
goto FAIL0;
}
parms->tid = thread;
parms->start = start;
parms->arg = arg;
if (attr != NULL && *attr != NULL)
{
stackSize = (*attr)->stacksize;
thread->detachState = (*attr)->detachstate;
}
else
{
/*
* Default stackSize
*/
stackSize = 0;
}
thread->state = run
? PThreadStateInitial
: PThreadStateSuspended;
thread->keys = NULL;
thread->threadH = (HANDLE)
_beginthreadex (
(void *) NULL, /* No security info */
(unsigned) stackSize, /* default stack size */
(unsigned (__stdcall *) (void *)) _pthread_threadStart,
parms,
(unsigned) run ? 0 : CREATE_SUSPENDED,
(unsigned *) &(thread->thread));
result = (thread->threadH != 0) ? 0 : EAGAIN;
/*
* Fall Through Intentionally
*/
/*
* ------------
* Failure Code
* ------------
*/
FAIL0:
if (result != 0)
{
_pthread_threadDestroy (thread);
thread = NULL;
if (parms != NULL)
{
free (parms);
}
}
*tid = thread;
return (result);
} /* pthread_create */
/* </JEB> */
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