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Add task_setcanceltype()

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Gregory Nutt
2016-12-10 16:06:14 -06:00
parent 5fb207eb36
commit f132960789
13 changed files with 211 additions and 102 deletions
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sched/pthread/Make.defs
+1 -1
View File
@@ -53,7 +53,7 @@ CSRCS += pthread_condtimedwait.c pthread_kill.c pthread_sigmask.c
endif
ifeq ($(CONFIG_CANCELLATION_POINTS),y)
CSRCS += pthread_setcanceltype.c pthread_testcancel.c
CSRCS += pthread_testcancel.c
endif
ifeq ($(CONFIG_SMP),y)
sched/pthread/pthread_setcanceltype.c
-128
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@@ -1,128 +0,0 @@
/****************************************************************************
* sched/pthread/pthread_setcanceltype.c
*
* Copyright (C) 2016 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <pthread.h>
#include <errno.h>
#include "sched/sched.h"
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: pthread_setcancelstate
*
* Description:
* The pthread_setcanceltype() function atomically both sets the calling
* thread's cancelability type to the indicated type and returns the
* previous cancelability type at the location referenced by oldtype
* Legal values for type are PTHREAD_CANCEL_DEFERRED and
* PTHREAD_CANCEL_ASYNCHRONOUS.
*
* The cancelability state and type of any newly created threads,
* including the thread in which main() was first invoked, are
* PTHREAD_CANCEL_ENABLE and PTHREAD_CANCEL_DEFERRED respectively.
*
****************************************************************************/
int pthread_setcanceltype(int type, FAR int *oldtype)
{
FAR struct tcb_s *tcb = this_task();
int ret = OK;
/* Suppress context changes for a bit so that the flags are stable. (the
* flags should not change in interrupt handling).
*/
sched_lock();
/* Return the current type if so requrested */
if (oldtype != NULL)
{
if ((tcb->flags & TCB_FLAG_CANCEL_DEFERRED) != 0)
{
*oldtype = PTHREAD_CANCEL_DEFERRED;
}
else
{
*oldtype = PTHREAD_CANCEL_ASYNCHRONOUS;
}
}
/* Set the new cancellation type */
if (type == PTHREAD_CANCEL_ASYNCHRONOUS)
{
/* Clear the deferred cancellation bit */
tcb->flags &= ~TCB_FLAG_CANCEL_DEFERRED;
#ifdef CONFIG_CANCELLATION_POINTS
/* If we just switched from deferred to asynchronous type and if a
* cancellation is pending, then exit now.
*/
if ((tcb->flags & TCB_FLAG_CANCEL_PENDING) != 0 &&
(tcb->flags & TCB_FLAG_NONCANCELABLE) == 0)
{
tcb->flags &= ~TCB_FLAG_CANCEL_PENDING;
pthread_exit(PTHREAD_CANCELED);
}
#endif
}
#ifdef CONFIG_CANCELLATION_POINTS
else if (type == PTHREAD_CANCEL_DEFERRED)
{
/* Set the deferred cancellation type */
tcb->flags |= TCB_FLAG_CANCEL_DEFERRED;
}
#endif
else
{
ret = EINVAL;
}
sched_unlock();
return ret;
}