114 lines
4.1 KiB
C
114 lines
4.1 KiB
C
/****************************************************************************
|
|
* 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 */
|