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author | Gregory Nutt <gnutt@nuttx.org> | 2014-09-28 10:15:49 -0600 |
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committer | Gregory Nutt <gnutt@nuttx.org> | 2014-09-28 10:15:49 -0600 |
commit | b5076dc5aa909ff05cbf7f441b8e5f9f8693541d (patch) | |
tree | 9c90fafbdc5062547b4fe805c5722d6494e991d6 | |
parent | 9fdda2eb2863b76b0e7cff713ca8ca75bb419ee6 (diff) | |
download | nuttx-b5076dc5aa909ff05cbf7f441b8e5f9f8693541d.tar.gz nuttx-b5076dc5aa909ff05cbf7f441b8e5f9f8693541d.tar.bz2 nuttx-b5076dc5aa909ff05cbf7f441b8e5f9f8693541d.zip |
Add basic data structures that will allow us to move named semaphore support out of the OS and into the VFS (not complete).
-rw-r--r-- | nuttx/include/nuttx/semaphore.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/nuttx/include/nuttx/semaphore.h b/nuttx/include/nuttx/semaphore.h new file mode 100644 index 000000000..a37c35d97 --- /dev/null +++ b/nuttx/include/nuttx/semaphore.h @@ -0,0 +1,98 @@ +/**************************************************************************** + * include/nuttx/semaphore.h + * + * 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. + * + ****************************************************************************/ + +#ifndef __INCLUDE_NUTTX_SEMAPHORE_H +#define __INCLUDE_NUTTX_SEMAPHORE_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <semaphore.h> + +#include <nuttx/fs/fs.h> + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/* This is the named semaphore inode */ + +struct inode; /* Forward reference */ +struct semaphore_operations +{ + /* Common inode operations */ + + int (*open)(FAR struct inode *inode); + int (*close)(FAR struct inode *inode); + int (*unlink)(FAR struct inode *inode, FAR const char *relpath); + + /* Payload unique to named semaphores */ + + uint16_t ns_refs; /* Number of open references semaphore */ + sem_t ns_sem; /* The semaphore itself */ +}; + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +#ifndef __ASSEMBLY__ + +#ifdef __cplusplus +#define EXTERN extern "C" +extern "C" +{ +#else +#define EXTERN extern +#endif + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* __ASSEMBLY__ */ +#endif /* __INCLUDE_NUTTX_SEMAPHORE_H */ |