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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [itron/] [include/] [itronsys/] [mbox.h] - Blame information for rev 173

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/*
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 *  COPYRIGHT (c) 1989-1999.
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 *  On-Line Applications Research Corporation (OAR).
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 *
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 *  The license and distribution terms for this file may be
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 *  found in the file LICENSE in this distribution or at
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 *  http://www.OARcorp.com/rtems/license.html.
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 *
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 *  $Id: mbox.h,v 1.2 2001-09-27 11:59:12 chris Exp $
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 */
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#ifndef __ITRON_MBOX_h_
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#define __ITRON_MBOX_h_
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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 *  Create Mailbox (cre_mbx) Structure
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 */
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typedef struct t_cmbx {
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  VP    exinf;    /* extended information */
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  ATR   mbxatr;   /* mailbox attributes */
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  /* Following is implementation-dependent function */
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  INT   bufcnt;   /* maximum number of messages to let pend */
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  /* additional information may be included depending on the implementation */
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} T_CMBX;
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/*
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 *  mbxatr
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 */
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#define TA_TFIFO   0x00   /* waiting tasks are handled by FIFO */
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#define TA_TPRI    0x01   /* waiting tasks are handled by priority */
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#define TA_MFIFO   0x00   /* messages are handled by FIFO */
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#define TA_MPRI    0x02   /* messages are handled by priority */
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typedef struct t_msg {
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  /*
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   *  A region (header) reserved by the OS may be included first
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   *  depending on the implementation.
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   *
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   *  NOTE: The first two fields are RTEMS specific.
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   */
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  INT       msgpri;   /* priority of each message */
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  /* VB   msgcont[];  XXX */
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  unsigned8 msgcont[1];
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} T_MSG;
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/*
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 *  Reference Mailbox (ref_mbx) Structure
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 */
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typedef struct t_rmbx {
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  VP        exinf;    /* extended information */
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  BOOL_ID   wtsk;     /* indicates whether or not there is a waiting task */
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  T_MSG    *pk_msg;   /* message to be sent next */
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  /* additional information may be included depending on the implementation */
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} T_RMBX;
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/*
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 *  Mailbox Functions
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 */
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/*
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 *  cre_mbx - Create Mailbox
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 */
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ER cre_mbx(
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  ID      mbxid,
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  T_CMBX *pk_cmbx
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);
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/*
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 *  del_mbx - Delete Mailbox
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 */
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ER del_mbx(
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  ID mbxid
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);
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/*
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 *  snd_msg - Send Message to Mailbox
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 */
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ER snd_msg(
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  ID     mbxid,
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  T_MSG *pk_msg
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);
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/*
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 *  rcv_msg - Receive Message from Mailbox
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 */
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ER rcv_msg(
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  T_MSG **ppk_msg,
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  ID      mbxid
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);
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/*
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 *  prcv_msg - Poll and Receive Message from Mailbox
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 */
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ER prcv_msg(
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  T_MSG **ppk_msg,
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  ID      mbxid
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);
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/*
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 *  trcv_msg - Receive Message from Mailbox with Timeout
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 */
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ER trcv_msg(
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  T_MSG **ppk_msg,
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  ID      mbxid,
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  TMO     tmout
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);
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/*
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 *  ref_mbx - Reference Mailbox Status
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 */
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ER ref_mbx(
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  T_RMBX *pk_rmbx,
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  ID      mbxid
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);
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#ifdef __cplusplus
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}
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#endif
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#endif
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/* end of include file */
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