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Diffstat (limited to 'nuttx/sched/wd_delete.c')
-rw-r--r-- | nuttx/sched/wd_delete.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/nuttx/sched/wd_delete.c b/nuttx/sched/wd_delete.c new file mode 100644 index 000000000..16c123e13 --- /dev/null +++ b/nuttx/sched/wd_delete.c @@ -0,0 +1,127 @@ +/**************************************************************************** + * sched/wd_delete.c + * + * Copyright (C) 2007-2009 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 <wdog.h> +#include <queue.h> +#include <errno.h> + +#include <nuttx/arch.h> + +#include "wd_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Type Declarations + ****************************************************************************/ + +/**************************************************************************** + * Global Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: wd_delete + * + * Description: + * The wd_delete function will deallocate a watchdog by returning it to + * the free pool of watchdogs. The watchdog will be removed from the timer + * queue if has been started. + * + * Parameters: + * wdId - The watchdog ID to delete. This is actually a pointer to a + * watchdog structure. + * + * Return Value: + * Returns OK or ERROR + * + * Assumptions: + * The caller has assured that the watchdog is no longer in use. + * + ****************************************************************************/ + +int wd_delete(WDOG_ID wdId) +{ + irqstate_t saved_state; + + /* Verify that a valid watchdog was provided */ + + if (!wdId) + { + set_errno(EINVAL); + return ERROR; + } + + /* The following steps are atomic... the watchdog must not be active when + * it is being deallocated. + */ + + saved_state = irqsave(); + + /* Check if the watchdog has been started. */ + + if (wdId->active) + { + wd_cancel(wdId); + } + + /* Put the watchdog back on the free list */ + + sq_addlast((FAR sq_entry_t*)wdId, &g_wdfreelist); + irqrestore(saved_state); + + /* Return success */ + + return OK; +} |