compiler/include/exec/ports.h

   1 #ifndef EXEC_PORTS_H
   2 #define EXEC_PORTS_H
   3
   4 /*
   5     Copyright  1995-2001, The AROS Development Team. All rights reserved.
   6     $Id$
   7
   8     Desc: Message ports and messages
   9     Lang: english
  10 */
  11
  12 #ifndef EXEC_NODES_H
  13 #   include "exec/nodes.h"
  14 #endif
  15 #ifndef EXEC_LISTS_H
  16 #   include "exec/lists.h"
  17 #endif
  18
  19 /* MsgPort */
  20 struct MsgPort
  21 {
  22     struct Node mp_Node;
  23     UBYTE       mp_Flags;
  24     UBYTE       mp_SigBit;  /* Signal bit number */
  25     void      * mp_SigTask; /* Object to be signalled */
  26     struct List mp_MsgList; /* Linked list of messages */
  27 };
  28
  29 #define mp_SoftInt mp_SigTask   /* Alias */
  30
  31 /* mp_Flags: Port arrival actions (PutMsg) */
  32 #define PF_ACTION       7       /* Mask */
  33
  34 #define PA_SIGNAL       0       /* Signal task in mp_SigTask */
  35 #define PA_SOFTINT      1       /* Signal SoftInt in mp_SoftInt/mp_SigTask */
  36 #define PA_IGNORE       2       /* Ignore arrival */
  37
  38 #define PA_CALL         3       /* Call function in mp_SigTask. This was never
  39                                    documented on AmigaOS and was never defined
  40                                    but would work for mp_Flags == 3 */
  41
  42 #define PA_FASTCALL     4       /* AROS extension. Like PA_SOFTINT, calls an
  43                                    Interrupt in mp_SoftInt, but passes the
  44                                    message as the third argument without doesn't
  45                                    add it to the message list and so doesn't
  46                                    require any locking, task switching or
  47                                    Disable()/Enable() pairs */
  48
  49 /* Message */
  50 struct Message
  51 {
  52     struct Node      mn_Node;
  53     struct MsgPort * mn_ReplyPort;  /* message reply port */
  54     UWORD            mn_Length;     /* total message length, in bytes */
  55                                     /* (include the size of the Message
  56                                        structure in the length) */
  57 };
  58
  59 struct MagicMessage
  60 {
  61     struct Node     mn_Node;
  62     struct MsgPort * mn_ReplyPort;  /* message reply port */
  63     UWORD        mn_Length;     /* total message length, in bytes */
  64                     /* (include the size of the Message
  65                        structure in the length) */
  66     ULONG   mn_Magic;       /* can be used to figure out the message sender */
  67     ULONG   mn_Version;     /* version can be used to extend a message in later versions */
  68 };
  69
  70 /* definition for entry Magic in Messages
  71    Magic is introduced to prevent Multiple Ports, for example if you´r using
  72    ScreenNotifications and DecorNotifications you must have two Ports as long
  73    as you cannot figure out which Messsage ist posted. With Magic this is no
  74    problem. */
  75
  76 #define   MAGIC_DECORATOR       0x8000001
  77 #define   MAGIC_SCREENNOTIFY    0x8000002
  78
  79 #endif  /* EXEC_PORTS_H */