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- /****************************************************************************
- * include/sys/ipc.h
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership. The
- * ASF licenses this file to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the
- * License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- *
- ****************************************************************************/
- #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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