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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-11-15 00:14:05 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2008-11-15 00:14:05 +0000 |
commit | cde81697d12417a8d23655997fdf209a3d6bc417 (patch) | |
tree | 886cd728935bde3be18e8d5d99e0c3d6052706b5 /nuttx/drivers/bch/bchlib_sem.c | |
parent | 33750aac935ce4f0f9c2e44ab1e43cd196c95ce9 (diff) | |
download | px4-nuttx-cde81697d12417a8d23655997fdf209a3d6bc417.tar.gz px4-nuttx-cde81697d12417a8d23655997fdf209a3d6bc417.tar.bz2 px4-nuttx-cde81697d12417a8d23655997fdf209a3d6bc417.zip |
Block-to-character driver
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1235 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/drivers/bch/bchlib_sem.c')
-rw-r--r-- | nuttx/drivers/bch/bchlib_sem.c | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/nuttx/drivers/bch/bchlib_sem.c b/nuttx/drivers/bch/bchlib_sem.c new file mode 100644 index 000000000..c7b0f39f7 --- /dev/null +++ b/nuttx/drivers/bch/bchlib_sem.c @@ -0,0 +1,90 @@ +/**************************************************************************** + * drivers/bch/bchlib_sem.c + * + * Copyright (C) 2008 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 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. + * + ****************************************************************************/ + +/**************************************************************************** + * Compilation Switches + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> + +#include <errno.h> +#include <assert.h> +#include <debug.h> + +#include "bch_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: bch_semtake + ****************************************************************************/ + +void bchlib_semtake(FAR struct bchlib_s *bch) +{ + /* Take the semaphore (perhaps waiting) */ + + while (sem_wait(&bch->sem) != 0) + { + /* The only case that an error should occur here is if + * the wait was awakened by a signal. + */ + + ASSERT(errno == EINTR); + } +} |