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/*
* create.c
*
* Description:
* This translation unit implements routines associated with spawning a new
* thread.
*/
#include <errno.h>
#include <windows.h>
#include <process.h>
#include <string.h>
#include "pthread.h"
#include "implement.h"
unsigned
STDCALL _pthread_start_call(void * us_arg)
{
/* We're now in a running thread. Any local variables here are on
this thread's private stack so we're safe to leave data in them
until we leave. */
pthread_t us;
/* FIXME: Needs to be a malloc(PTHREAD_KEYS_MAX) otherwise changing
_PTHREAD_MAX_KEYS in a later version of the DLL will break older apps.
*/
void * keys[_PTHREAD_MAX_KEYS];
unsigned (*func)(void *);
void * arg;
unsigned ret;
us = (pthread_t) us_arg;
memset(keys, 0, sizeof(keys));
(void) TlsSetValue(_pthread_threadID_TlsIndex, (LPVOID) us);
(void) TlsSetValue(_pthread_TSD_keys_TlsIndex, (LPVOID) keys);
/* FIXME: For now, if priority setting fails then at least ensure
that our records reflect true reality. */
if (SetThreadPriority((HANDLE) us->win32handle, us->attr.priority) == FALSE)
{
us->attr.priority = GetThreadPriority((HANDLE) us->win32handle);
}
func = us->call.routine;
arg = us->call.arg;
ret = (*func)(arg);
_pthread_exit(us, NULL, ret);
/* Never Reached */
return 0;
}
int
pthread_create(pthread_t *thread,
const pthread_attr_t *attr,
void * (*start_routine) (void *),
void * arg)
{
HANDLE handle = (HANDLE) NULL;
unsigned flags;
void * security = NULL;
DWORD threadID;
pthread_attr_t * attr_copy;
pthread_t new_thread;
/* Success unless otherwise set. */
int ret;
/* CRITICAL SECTION */
pthread_mutex_lock(&_pthread_table_mutex);
ret = _pthread_new_thread(&new_thread);
pthread_mutex_unlock(&_pthread_table_mutex);
/* END CRITICAL SECTION */
if (ret == 0)
{
attr_copy = &(new_thread->attr);
/* Map given attributes otherwise just use default values. */
if (attr != NULL)
{
if (attr_copy->stacksize == 0)
{
attr_copy->stacksize = PTHREAD_STACK_MIN;
}
attr_copy->detachedstate = attr->detachedstate;
attr_copy->priority = attr->priority;
#if HAVE_SIGSET_T
memcpy(&(attr_copy->sigmask), &(attr->sigmask), sizeof(sigset_t));
#endif /* HAVE_SIGSET_T */
}
/* We call a generic wrapper which then calls the start routine. */
new_thread->call.routine = (unsigned (*)(void *)) start_routine;
new_thread->call.arg = arg;
/* Start running, not suspended. */
flags = 0;
handle = (HANDLE) _beginthreadex(security,
attr_copy->stacksize,
_pthread_start_call,
(void *) new_thread,
flags,
&threadID);
if (handle == (HANDLE) NULL)
{
ret = EAGAIN;
}
}
else
{
ret = EAGAIN;
}
if (ret == 0)
{
/* Let the caller know the thread handle. */
new_thread->win32handle = handle;
new_thread->ptstatus = _PTHREAD_INUSE;
*thread = new_thread;
}
else
{
/* CRITICAL SECTION */
pthread_mutex_lock(&_pthread_table_mutex);
/* Remove the failed thread entry. */
_pthread_delete_thread(new_thread);
pthread_mutex_unlock(&_pthread_table_mutex);
/* END CRITICAL SECTION */
}
return ret;
}
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