diff options
author | patacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679> | 2007-02-17 23:21:28 +0000 |
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committer | patacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679> | 2007-02-17 23:21:28 +0000 |
commit | 2ec7825e0da8f1af15869d94b0272215acc29ec8 (patch) | |
tree | 1c390958fae49e34dce698b175487e6d4681e540 /nuttx/sched/wd_create.c | |
parent | 8a23a89176bb272afaecf2075ee246289ded08db (diff) |
NuttX RTOS
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@3 7fd9a85b-ad96-42d3-883c-3090e2eb8679
Diffstat (limited to 'nuttx/sched/wd_create.c')
-rw-r--r-- | nuttx/sched/wd_create.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/nuttx/sched/wd_create.c b/nuttx/sched/wd_create.c new file mode 100644 index 0000000000..14a1c54104 --- /dev/null +++ b/nuttx/sched/wd_create.c @@ -0,0 +1,105 @@ +/************************************************************ + * wd_create.c + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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 Gregory Nutt 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 <sys/types.h> +#include <wdog.h> +#include <queue.h> +#include <nuttx/arch.h> +#include "wd_internal.h" + +/************************************************************ + * Definitions + ************************************************************/ + +/************************************************************ + * Private Type Declarations + ************************************************************/ + +/************************************************************ + * Global Variables + ************************************************************/ + +/************************************************************ + * Private Variables + ************************************************************/ + +/************************************************************ + * Private Functions + ************************************************************/ + +/************************************************************ + * Public Functions + ************************************************************/ + +/************************************************************ + * Function: wd_create + * + * Description: + * The wd_create function will create a watchdog by + * allocating it from the free list. + * + * Parameters: + * None + * + * Return Value: + * Pointer to watchdog (i.e., the watchdog ID), or NULL + * if insufficient watchdogs are available. + * + * Assumptions: + * + ************************************************************/ + +WDOG_ID wd_create (void) +{ + wdog_t *wdog; + sint32 saved_state; + + saved_state = irqsave(); + wdog = (wdog_t*)sq_remfirst(&g_wdfreelist); + irqrestore(saved_state); + + /* Indicate that the watchdog is not actively timing */ + + if (wdog) + { + wdog->next = NULL; + wdog->active = FALSE; + } + return (WDOG_ID)wdog; +} |