rtems_status_code rtems_libio_share_private_env(rtems_id task_id)
{
rtems_status_code sc;
rtems_user_env_t * shared_user_env;
rtems_id current_task_id;
/*
* get current task id
*/
current_task_id = rtems_task_self();
/*
* If this was an attempt to share the task with self,
* if somebody wanted to do it... Lets tell them, its shared
*/
if( task_id == current_task_id )
return RTEMS_SUCCESSFUL;
/*
* Try to get the requested user environment
*/
sc = rtems_task_variable_get(
task_id,
(void*)&rtems_current_user_env,
(void*)&shared_user_env );
/*
* If it was not successful, return the error code
*/
if (sc != RTEMS_SUCCESSFUL)
return sc;
/*
* If we are here, we have the required environment to be
* shared with the current task
*/
/*
* If we have a current environment in place, we need to
* free it, since we will be sharing the variable with the
* shared_user_env
*/
if (rtems_current_user_env->task_id==current_task_id) {
rtems_user_env_t *tmp = rtems_current_user_env;
free_user_env( tmp );
}
/* the current_user_env is the same pointer that remote env */
rtems_current_user_env = shared_user_env;
/* increase the reference count */
#ifdef HAVE_USERENV_REFCNT
rtems_current_user_env->refcnt++;
#endif
return RTEMS_SUCCESSFUL;
}
epos_status_code epos_libio_share_private_env(epos_id task_id) {
epos_status_code sc;
epos_user_env_t * shared_user_env;
epos_id current_task_id;
sc=epos_task_ident(RTEMS_SELF,0,¤t_task_id);
if (sc != RTEMS_SUCCESSFUL) return sc;
if (epos_current_user_env->task_id==current_task_id) {
/* kill the current user env & task_var*/
epos_user_env_t *tmp = epos_current_user_env;
sc = epos_task_variable_delete(RTEMS_SELF,(void*)&epos_current_user_env);
if (sc != RTEMS_SUCCESSFUL) return sc;
free_user_env(tmp);
};
/* AT THIS POINT, epos_current_user_env is DANGLING */
sc = epos_task_variable_get(task_id,(void*)&epos_current_user_env,
(void*)&shared_user_env );
if (sc != RTEMS_SUCCESSFUL)
goto bailout;
sc = epos_task_variable_add(RTEMS_SELF,(void*)&epos_current_user_env,free_user_env);
if (sc != RTEMS_SUCCESSFUL)
goto bailout;
/* the current_user_env is the same pointer that remote env */
epos_current_user_env = shared_user_env;
/* increase the reference count */
#ifdef HAVE_USERENV_REFCNT
epos_current_user_env->refcnt++;
#endif
return RTEMS_SUCCESSFUL;
bailout:
/* fallback to the global env */
epos_current_user_env = &epos_global_user_env;
return sc;
}
