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/****************************************************************************
* include/sys/ipc.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_SYS_IPC_H
#define __INCLUDE_SYS_IPC_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Mode bits: The lower order 9-bit bits are the standard mode bits */
#define IPC_MODE 0x01ff /* Mode bit mask */
#define IPC_CREAT (1 << 10) /* Create entry if key does not exist */
#define IPC_EXCL (1 << 11) /* Fail if key exists */
#define IPC_NOWAIT (1 << 12) /* Error if request must wait */
/* Keys: */
#define IPC_PRIVATE 0 /* Private key */
/* Control commands: */
#define IPC_RMID 0 /* Remove identifier */
#define IPC_SET 1 /* Set options */
#define IPC_STAT 2 /* Get options */
/****************************************************************************
* Public Type Definitions
****************************************************************************/
/****************************************************************************
* Public Data
****************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/* The ipc_perm structure is used by three mechanisms for XSI interprocess
* communication (IPC): messages, semaphores, and shared memory. All use a
* common structure type, ipc_perm, to pass information used in determining
* permission to perform an IPC operation.
*/
struct ipc_perm
{
#if 0 /* User and group IDs not yet supported by NuttX */
uid_t uid; /* Owner's user ID */
gid_t gid; /* Owner's group ID */
uid_t cuid; /* Creator's user ID */
gid_t cgid; /* Creator's group ID */
#endif
mode_t mode; /* Read/write permission */
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
key_t ftok(FAR const char *path, int id);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_SYS_IPC_H */
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