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author | patacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679> | 2012-09-12 15:21:26 +0000 |
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committer | patacongo <patacongo@7fd9a85b-ad96-42d3-883c-3090e2eb8679> | 2012-09-12 15:21:26 +0000 |
commit | 43069a49aac009d47ee2e86053fde7e877a48cad (patch) | |
tree | 0137ed0d6ce1867c055a5cc30114dbfb28e2f876 /nuttx/mm | |
parent | eac15a4720dd9d514ab7d683fb68797c174293cc (diff) | |
download | px4-firmware-43069a49aac009d47ee2e86053fde7e877a48cad.tar.gz px4-firmware-43069a49aac009d47ee2e86053fde7e877a48cad.tar.bz2 px4-firmware-43069a49aac009d47ee2e86053fde7e877a48cad.zip |
New file missed in last check-in
git-svn-id: https://nuttx.svn.sourceforge.net/svnroot/nuttx/trunk@5135 7fd9a85b-ad96-42d3-883c-3090e2eb8679
Diffstat (limited to 'nuttx/mm')
-rw-r--r-- | nuttx/mm/mm_grancritical.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/nuttx/mm/mm_grancritical.c b/nuttx/mm/mm_grancritical.c new file mode 100644 index 000000000..190aa3e7d --- /dev/null +++ b/nuttx/mm/mm_grancritical.c @@ -0,0 +1,116 @@ +/**************************************************************************** + * 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 */ + + |