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   1 /*
   2  * Copyright (c) 2005-2008, Kohsuke Ohtani
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. Neither the name of the author nor the names of any co-contributors
  14  *    may be used to endorse or promote products derived from this software
  15  *    without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  30 #ifndef _SYS_IPC_H
  31 #define _SYS_IPC_H
  33 #include <sys/types.h>
  35 /*
  36  * Message header
  37  *
  38  * The ID of send task is automatically filled by the kernel
  39  * in msg_send() call. So there are no need to set it by the
  40  * sender task. The receiver task can always trust the task ID
  41  * in all messages.
  42  */
  43 struct msg_header {
task_t  task;           /* id of send task */
  45         int     code;           /* message code */
  46         int     status;         /* return status */
  47 };
  49 /*
  50  * Standard messages
  51  */
  52 #define STD_NULL        0x00000000
  53 #define STD_VERSION     0x00000001
  54 #define STD_DEBUG       0x00000002
  55 #define STD_BOOT        0x00000003
  56 #define STD_SHUTDOWN    0x00000004
  58 /*
  59  * Generic message
  60  */
  61 struct msg {
  62         struct msg_header hdr;          /* message header */
  63         int     data[4];                /* integer data */
  64 };
  66 #endif /* !_SYS_IPC_H */