workbench/prefs/Editor/PrefsPort.c

   1 /***************************************************************
   2 **** PrefsPort.c: Communication port with JanoEditor        ****
   3 **** Free software under GNU license, started on 11/11/2000 ****
   4 **** Written by T.Pierron                                   ****
   5 ***************************************************************/
   6
   7 #include <exec/types.h>
   8 #include <exec/io.h>
   9 #include <libraries/dos.h>
  10
  11 #include <proto/exec.h>
  12 #include <proto/dos.h>
  13
  14 #include <clib/alib_protos.h>
  15
  16 #include "Gui.h"
  17 #include "Prefs.h"
  18 #include "IPC_Prefs.h"
  19 #include "JanoPrefs.h"
  20
  21 /** Port of Pref and Jano **/
  22 static struct MsgPort *port, *reply;
  23 static struct JPacket *cmd;
  24
  25 UBYTE *PortName = JANOPREFS_PORT;
  26
  27 /** Look if prefs isn't alredy running **/
  28 char find_prefs( void )
  29 {
  30         ULONG sigwait;
  31         if((reply = (struct MsgPort *) FindPort(PortName)))
  32         {
  33                 PortName = NULL;                /* Private port */
  34                 if(( sigwait = create_port() ))
  35                 {
  36                         /* Send to the running preference tool that someone tries to launch it again */
  37                         cmd->class = CMD_SHOW;
  38                         PutMsg(reply, (struct Message *)cmd);
  39                         /* cmd packet is associated with "port", thus reply will be done here */
  40                         Wait( sigwait );
  41                         /* Unqueue message (don't reply!) */
  42                         GetMsg( port );
  43                 }
  44                 /* Cleanup will be done later */
  45                 return 1;
  46         } else return 0;
  47 }
  48
  49 /** Setup public port of the preference editor **/
  50 ULONG create_port( void )
  51 {
  52         /* Create a port and  */
  53         if(( port = (struct MsgPort *) CreatePort(PortName, 0L) ))
  54         {
  55                 /* Create a message that can be sent to the editor */
  56                 if(( cmd = (struct JPacket *) CreateExtIO(port, (long) sizeof (*cmd)) ))
  57                         return (unsigned) (1L << port->mp_SigBit);
  58
  59                 DeletePort(port);
  60         }
  61         return 0;
  62 }
  63
  64 /** Search for a running session of editor **/
  65 char find_jano(PREFS *prefs)
  66 {
  67         extern struct Screen *Scr;
  68         if((reply = (struct MsgPort *) FindPort(JANO_PORT)))
  69         {
  70                 /* Get a copy of the preferences that uses the editor */
  71                 cmd->class = CMD_PREF;
  72                 PutMsg(reply, (struct Message *)cmd);
  73                 Wait( 1 << port->mp_SigBit | SIGBREAKF_CTRL_C );
  74                 GetMsg( port );
  75                 /* Copy to our local buffer */
  76                 CopyMem(&cmd->prefs, prefs, sizeof(*prefs));
  77                 Scr = prefs->current;
  78                 return 1;
  79         }
  80         return 0;
  81 }
  82
  83 /** Send a preference struct to Jano's public port **/
  84 char send_jano(PREFS *prefs, ULONG class)
  85 {
  86         /* The port can be shutted down!! */
  87         if(( reply = (struct MsgPort *) FindPort(JANO_PORT)))
  88         {
  89                 cmd->class = class;
  90                 CopyMem(prefs, &cmd->prefs, sizeof(*prefs));
  91
  92                 PutMsg(reply, (struct Message *)cmd);
  93                 Wait( 1 << port->mp_SigBit | SIGBREAKF_CTRL_C );
  94                 GetMsg( port );
  95                 return 1;
  96         } else return 0;
  97 }
  98
  99 /** Shutdown port **/
 100 void close_port( void )
 101 {
 102         if( cmd )   DeleteExtIO((struct IORequest *)cmd);
 103         if( port ) {
 104                 /* Be sure there are no message left */
 105                 struct Message *msg;
 106                 while((msg = GetMsg( port ))) ReplyMsg(msg);
 107                 DeletePort( port );
 108         }
 109 }
 110
 111 /** Handle messages posted to the public port **/
 112 void handle_port( void )
 113 {
 114         struct JPacket *msg;
 115         extern UBYTE    ConfigFile;
 116         while(( msg = (struct JPacket *) GetMsg(port) ))
 117         {
 118                 switch( msg->class )
 119                 {
 120                         case CMD_SHOW: setup_guipref(); break;
 121                         case CMD_KILL:
 122                                 /* Close preference tool only if it's associated to jano */
 123                                 if( !ConfigFile ) close_prefwnd(0); break;
 124                 }
 125                 ReplyMsg((struct Message *)msg);
 126         }
 127 }