compiler/include/dos/notify.h

   1 #ifndef DOS_NOTIFY_H
   2 #define DOS_NOTIFY_H
   3
   4 /*
   5     Copyright © 1995-2004, The AROS Development Team. All rights reserved.
   6     $Id$
   7
   8     Notification handling.
   9 */
  10
  11 #ifndef EXEC_PORTS_H
  12 #   include <exec/ports.h>
  13 #endif
  14 #ifndef EXEC_TASKS_H
  15 #   include <exec/tasks.h>
  16 #endif
  17 #ifndef EXEC_TYPES_H
  18 #   include <exec/types.h>
  19 #endif
  20
  21 /*** NotifyRequest **********************************************************/
  22
  23 /*
  24     General notification structure as passed to StartNotify() and EndNotify().
  25     After passing it to StartNotify() the first time, this structure becomes
  26     READ-ONLY!
  27 */
  28
  29 struct NotifyRequest
  30 {
  31     STRPTR  nr_Name;     /* Name of the watched file. */
  32     STRPTR  nr_FullName; /* Fully qualified name of the watched file. This is
  33                             READ-ONLY! */
  34     IPTR    nr_UserData; /* Fill in with your own data. */
  35     ULONG   nr_Flags;    /* see below */
  36
  37     /*
  38         The following union specified the way to notify the application, if
  39         the watched file changes. IF NRF_SEND_MESSAGE is set, nr_Msg is used,
  40         when NRF_SEND_SIGNAL is set, nr_Signal is used.
  41     */
  42     union
  43     {
  44         struct
  45         {
  46             struct MsgPort * nr_Port; /* Port to send message to. */
  47         } nr_Msg;
  48         struct
  49         {
  50             struct Task * nr_Task;      /* Task to notify. */
  51             UBYTE         nr_SignalNum; /* Signal number to set. */
  52             UBYTE         nr_pad[3];    /* PRIVATE */
  53         } nr_Signal;
  54     } nr_stuff;
  55
  56     ULONG            nr_Reserved[4]; /* PRIVATE! Set to 0 for now. */
  57
  58     ULONG            nr_MsgCount; /* Number of unreplied messages. */
  59
  60     struct MsgPort  *nr_Handler;  /* Filesystem task/device. Used by EndNotify() */
  61 };
  62
  63 /* nr_Flags */
  64 /* The two following flags specify by which means the watching task is to be
  65    notified. */
  66 #define NRB_SEND_MESSAGE  0 /* Send a message to the specified message port. */
  67 #define NRB_SEND_SIGNAL   1 /* Set a signal of the specified task. */
  68 #define NRB_WAIT_REPLY    3 /* Wait for a reply by the application before
  69                                going on with watching? */
  70 #define NRB_NOTIFY_INITIAL 4 /* Notify if the file/directory exists when
  71                                 the notification request is posted */
  72
  73 #define NRF_SEND_MESSAGE   (1L<<NRB_SEND_MESSAGE)
  74 #define NRF_SEND_SIGNAL    (1L<<NRB_SEND_SIGNAL)
  75 #define NRF_WAIT_REPLY     (1L<<NRB_WAIT_REPLY)
  76 #define NRF_NOTIFY_INITIAL (1L<<NRB_NOTIFY_INITIAL)
  77
  78 /* The following flags are for use by handlers only! */
  79 #define NR_HANDLER_FLAGS 0xffff0000
  80 #define NRB_MAGIC               31
  81 #define NRF_MAGIC          (1L<<31)
  82
  83 /**********************************************************************
  84  **************************** NotifyMessage ***************************
  85  **********************************************************************/
  86
  87 /* The NotifyMessage if send to the message port specified in
  88    NotifyRequest->nr_Msg->nr_Port, if NRF_SEND_MESSAGE was set in
  89    NotifyRequest->nr_Flags and the watched file changes. */
  90 struct NotifyMessage
  91 {
  92       /* Embedded message structure as defined in <exec/ports.h>. */
  93     struct Message nm_ExecMessage;
  94
  95     ULONG                  nm_Class; /* see below */
  96     UWORD                  nm_Code;  /* see below */
  97       /* The notify structure that was passed to StartNotify(). */
  98     struct NotifyRequest * nm_NReq;
  99
 100     /* The following two fields are for PRIVATE use by handlers. */
 101     IPTR nm_DoNotTouch;
 102     IPTR nm_DoNotTouch2;
 103 };
 104
 105 /* nm_Class. Do not use, yet. */
 106 #define NOTIFY_CLASS 0x40000000
 107
 108 /* nm_Code. Do not use, yet. */
 109 #define NOTIFY_CODE  0x1234
 110
 111 #endif /* DOS_NOTIFY_H */