114 lines
4.1 KiB
C
114 lines
4.1 KiB
C
/****************************************************************************
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* include/sys/ipc.h
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*
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* Copyright (C) 2014 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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****************************************************************************/
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#ifndef __INCLUDE_SYS_IPC_H
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#define __INCLUDE_SYS_IPC_H
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <sys/types.h>
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/****************************************************************************
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* Pre-Processor Definitions
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****************************************************************************/
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/* Mode bits: The lower order 9-bit bits are the standard mode bits */
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#define IPC_MODE 0x01ff /* Mode bit mask */
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#define IPC_CREAT (1 << 10) /* Create entry if key does not exist */
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#define IPC_EXCL (1 << 11) /* Fail if key exists */
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#define IPC_NOWAIT (1 << 12) /* Error if request must wait */
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/* Keys: */
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#define IPC_PRIVATE 0 /* Private key */
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/* Control commands: */
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#define IPC_RMID 0 /* Remove identifier */
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#define IPC_SET 1 /* Set options */
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#define IPC_STAT 2 /* Get options */
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/****************************************************************************
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* Public Type Definitions
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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#undef EXTERN
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#if defined(__cplusplus)
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#define EXTERN extern "C"
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extern "C"
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{
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#else
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#define EXTERN extern
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#endif
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/* The ipc_perm structure is used by three mechanisms for XSI interprocess
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* communication (IPC): messages, semaphores, and shared memory. All use a
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* common structure type, ipc_perm, to pass information used in determining
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* permission to perform an IPC operation.
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*/
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struct ipc_perm
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{
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#if 0 /* User and group IDs not yet supported by NuttX */
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uid_t uid; /* Owner's user ID */
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gid_t gid; /* Owner's group ID */
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uid_t cuid; /* Creator's user ID */
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gid_t cgid; /* Creator's group ID */
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#endif
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mode_t mode; /* Read/write permission */
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};
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/****************************************************************************
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* Public Function Prototypes
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****************************************************************************/
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key_t ftok(FAR const char *path, int id);
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#undef EXTERN
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#if defined(__cplusplus)
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}
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#endif
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#endif /* __INCLUDE_SYS_IPC_H */
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