/*
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* Copyright (C) 2008 Philippe Gerum <rpm@xenomai.org>.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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*/
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#include <pthread.h>
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#include <string.h>
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#include <boilerplate/ancillaries.h>
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#include <copperplate/threadobj.h>
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#include <vxworks/errnoLib.h>
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#include <vxworks/taskInfo.h>
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#include "taskLib.h"
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const char *taskName(TASK_ID task_id)
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{
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struct wind_task *task;
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struct service svc;
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const char *name;
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CANCEL_DEFER(svc);
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task = get_wind_task_or_self(task_id);
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if (task == NULL) {
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name = NULL;
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goto out;
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}
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name = task->name;
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put_wind_task(task);
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out:
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CANCEL_RESTORE(svc);
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/*
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* This is racy and unsafe, but this service is terminally
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* flawed by design anyway.
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*/
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return name;
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}
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TASK_ID taskIdDefault(TASK_ID task_id)
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{
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static TASK_ID value;
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if (task_id)
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value = task_id;
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return value;
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}
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TASK_ID taskNameToId(const char *name)
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{
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struct clusterobj *cobj;
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struct wind_task *task;
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struct service svc;
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CANCEL_DEFER(svc);
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cobj = cluster_findobj(&wind_task_table, name);
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CANCEL_RESTORE(svc);
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if (cobj == NULL)
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return ERROR;
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task = container_of(cobj, struct wind_task, cobj);
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return (TASK_ID)task->tcb;
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}
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BOOL taskIsReady(TASK_ID task_id)
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{
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struct wind_task *task;
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struct service svc;
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int status = 0;
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CANCEL_DEFER(svc);
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task = get_wind_task(task_id);
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if (task == NULL)
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goto out;
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status = get_task_status(task);
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put_wind_task(task);
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out:
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CANCEL_RESTORE(svc);
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return status == WIND_READY;
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}
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BOOL taskIsSuspended(TASK_ID task_id)
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{
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struct wind_task *task;
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struct service svc;
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int status = 0;
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CANCEL_DEFER(svc);
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task = get_wind_task(task_id);
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if (task == NULL)
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goto out;
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status = threadobj_get_status(&task->thobj);
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put_wind_task(task);
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out:
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CANCEL_RESTORE(svc);
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return (status & __THREAD_S_SUSPENDED) != 0;
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}
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STATUS taskGetInfo(TASK_ID task_id, TASK_DESC *desc)
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{
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int vfirst, vlast, ret;
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struct wind_task *task;
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struct WIND_TCB *tcb;
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pthread_attr_t attr;
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STATUS status = OK;
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struct service svc;
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size_t stacksize;
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void *stackbase;
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CANCEL_DEFER(svc);
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task = get_wind_task(task_id);
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if (task == NULL) {
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errno = S_objLib_OBJ_ID_ERROR;
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status = ERROR;
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goto out;
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}
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tcb = task->tcb;
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desc->td_tid = task_id;
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desc->td_priority = wind_task_get_priority(task);
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desc->td_status = get_task_status(task);
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desc->td_flags = tcb->flags;
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namecpy(desc->td_name, task->name);
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desc->td_entry = tcb->entry;
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desc->td_errorStatus = *task->thobj.errno_pointer;
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ret = pthread_getattr_np(task->thobj.ptid, &attr);
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put_wind_task(task);
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/*
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* If the target does not support pthread_getattr_np(), we are
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* out of luck for determining the stack information. We just
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* zero it.
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*/
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if (ret) {
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/* No idea, buddy. */
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desc->td_stacksize = 0;
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desc->td_pStackBase = NULL;
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} else {
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pthread_attr_getstack(&attr, &stackbase, &stacksize);
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desc->td_stacksize = stacksize;
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desc->td_pStackBase = stackbase;
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if (&vfirst < &vlast)
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/* Stack grows upward. */
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desc->td_pStackEnd = (caddr_t)stackbase + stacksize;
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else
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/* Stack grows downward. */
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desc->td_pStackEnd = (caddr_t)stackbase - stacksize;
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}
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out:
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CANCEL_RESTORE(svc);
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return status;
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}
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