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scoutos / prex-0.9.0 / include / ipc / ipc.h @ 03e9c04a

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/*
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 * Copyright (c) 2005-2008, Kohsuke Ohtani
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 * All rights reserved.
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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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 * 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 the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the author nor the names of any co-contributors
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 *    may be 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 AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#ifndef _SYS_IPC_H
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#define _SYS_IPC_H
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#include <sys/types.h>
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/*
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 * Message header
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 *
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 * The ID of send task is automatically filled by the kernel
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 * in msg_send() call. So there are no need to set it by the
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 * sender task. The receiver task can always trust the task ID
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 * in all messages.
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 */
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struct msg_header {
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        task_t        task;                /* id of send task */
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        int        code;                /* message code */
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        int        status;                /* return status */
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};
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/*
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 * Standard messages
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 */
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#define STD_NULL        0x00000000
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#define STD_VERSION        0x00000001
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#define STD_DEBUG        0x00000002
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#define STD_BOOT        0x00000003
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#define STD_SHUTDOWN        0x00000004
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/*
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 * Generic message
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 */
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struct msg {
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        struct msg_header hdr;                /* message header */
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        int        data[4];                /* integer data */
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};
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#endif /* !_SYS_IPC_H */