forked from Archive/PX4-Autopilot
118 lines
4.4 KiB
C
118 lines
4.4 KiB
C
/****************************************************************************
|
|
* sched/work_cancel.c
|
|
*
|
|
* Copyright (C) 2009-2010 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 <queue.h>
|
|
#include <assert.h>
|
|
#include <errno.h>
|
|
#include <debug.h>
|
|
|
|
#include <nuttx/arch.h>
|
|
#include <nuttx/wqueue.h>
|
|
|
|
#include "work_internal.h"
|
|
|
|
#ifdef CONFIG_SCHED_WORKQUEUE
|
|
|
|
/****************************************************************************
|
|
* Pre-processor Definitions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Type Declarations
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Variables
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Variables
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Private Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
/****************************************************************************
|
|
* Name: work_cancel
|
|
*
|
|
* Description:
|
|
* Cancel previously queued work. This removes work from the work queue.
|
|
* After work has been canceled, it may be re-queue by calling work_queue()
|
|
* again.
|
|
*
|
|
* Input parameters:
|
|
* work - The previously queue work structure to cancel
|
|
*
|
|
* Returned Value:
|
|
* Zero on success, a negated errno on failure
|
|
*
|
|
****************************************************************************/
|
|
|
|
int work_cancel(struct work_s *work)
|
|
{
|
|
irqstate_t flags;
|
|
|
|
DEBUGASSERT(work != NULL);
|
|
|
|
/* Cancelling the work is simply a matter of removing the work structure
|
|
* from the work queue. This must be done with interrupts disabled because
|
|
* new work is typically added to the work queue from interrupt handlers.
|
|
*/
|
|
|
|
flags = irqsave();
|
|
if (work->worker != NULL)
|
|
{
|
|
DEBUGASSERT(work->dq.flink || (FAR dq_entry_t *)work == g_work.head);
|
|
DEBUGASSERT(work->dq.blink || (FAR dq_entry_t *)work == g_work.tail);
|
|
dq_rem((FAR dq_entry_t *)work, &g_work);
|
|
|
|
work->worker = NULL;
|
|
}
|
|
|
|
irqrestore(flags);
|
|
return OK;
|
|
}
|
|
#endif /* CONFIG_SCHED_WORKQUEUE */
|