forked from Archive/PX4-Autopilot
117 lines
3.7 KiB
C
117 lines
3.7 KiB
C
|
/****************************************************************************
|
||
|
|
* mm/mm_grancritical.c
|
||
|
|
*
|
||
|
|
* Copyright (C) 2012 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 <stdlib.h>
|
||
|
|
#include <assert.h>
|
||
|
|
#include <errno.h>
|
||
|
|
|
||
|
|
#include <arch/irq.h>
|
||
|
|
#include <nuttx/gran.h>
|
||
|
|
|
||
|
|
#include "mm_gran.h"
|
||
|
|
|
||
|
|
#ifdef CONFIG_GRAN
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Pre-processor Definitions
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Public Data
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Private Functions
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Public Functions
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
/****************************************************************************
|
||
|
|
* Name: gran_enter_critical and gran_leave_critical
|
||
|
|
*
|
||
|
|
* Description:
|
||
|
|
* Critical section management for the granule allocator.
|
||
|
|
*
|
||
|
|
* Input Parameters:
|
||
|
|
* priv - Pointer to the gran state
|
||
|
|
*
|
||
|
|
* Returned Value:
|
||
|
|
* None
|
||
|
|
*
|
||
|
|
****************************************************************************/
|
||
|
|
|
||
|
|
void gran_enter_critical(FAR struct gran_s *priv)
|
||
|
|
{
|
||
|
|
#ifdef CONFIG_GRAN_INTR
|
||
|
|
priv->irqstate = irqsave();
|
||
|
|
#else
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
/* Continue waiting if we are awakened by a signal */
|
||
|
|
|
||
|
|
do
|
||
|
|
{
|
||
|
|
ret = sem_wait(&priv->exclsem);
|
||
|
|
if (ret < 0)
|
||
|
|
{
|
||
|
|
DEBUGASSERT(errno == EINTR);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
while (ret < 0);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
void gran_leave_critical(FAR struct gran_s *priv)
|
||
|
|
{
|
||
|
|
#ifdef CONFIG_GRAN_INTR
|
||
|
|
irqrestore(priv->irqstate);
|
||
|
|
#else
|
||
|
|
sem_post(&priv->exclsem);
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
#endif /* CONFIG_GRAN */
|
||
|
|
|
||
|
|
|