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Diffstat (limited to 'nuttx/sched/wdog/wd_recover.c')
-rw-r--r-- | nuttx/sched/wdog/wd_recover.c | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/nuttx/sched/wdog/wd_recover.c b/nuttx/sched/wdog/wd_recover.c new file mode 100644 index 000000000..bc1b3a839 --- /dev/null +++ b/nuttx/sched/wdog/wd_recover.c @@ -0,0 +1,115 @@ +/**************************************************************************** + * sched/wdog/wdog_recover.c + * + * Copyright (C) 2014 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 <nuttx/arch.h> +#include <nuttx/wdog.h> +#include <nuttx/sched.h> + +#include "wdog/wdog.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Type Declarations + ****************************************************************************/ + +/**************************************************************************** + * Global Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: wd_recover + * + * Description: + * This function is called from task_recover() when a task is deleted via + * task_delete() or via pthread_cancel(). It checks if the deleted task + * is waiting for a timed event and if so cancels the timeout + * + * Inputs: + * tcb - The TCB of the terminated task or thread + * + * Return Value: + * None. + * + * Assumptions: + * This function is called from task deletion logic in a safe context. + * + ****************************************************************************/ + +void wd_recover(FAR struct tcb_s *tcb) +{ + irqstate_t flags; + + /* The task is being deleted. If it is waiting for any timed event, then + * tcb->waitdog will be non-NULL. Cancel the watchdog now so that no + * events occur after the watchdog expires. Obviously there are lots of + * race conditions here so this will most certainly have to be revisited in + * the future. + */ + + flags = irqsave(); + if (tcb->waitdog) + { + (void)wd_cancel(tcb->waitdog); + (void)wd_delete(tcb->waitdog); + tcb->waitdog = NULL; + } + + irqrestore(flags); +} |