| 1 |
gregl |
3.1 |
/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
| 2 |
|
|
|
| 3 |
|
|
/* SCCSid "$SunId$ SGI" */ |
| 4 |
|
|
|
| 5 |
|
|
/* |
| 6 |
|
|
* Header for holodeck display drivers. |
| 7 |
|
|
*/ |
| 8 |
|
|
|
| 9 |
|
|
/* display requests */ |
| 10 |
gregl |
3.4 |
#define DR_NOOP 0 /* to release from vain DR_ATTEN */ |
| 11 |
gregl |
3.5 |
#define DR_BUNDLE 1 /* lone bundle request */ |
| 12 |
gregl |
3.2 |
#define DR_ATTEN 2 /* request for attention */ |
| 13 |
|
|
#define DR_SHUTDOWN 3 /* shutdown request */ |
| 14 |
|
|
#define DR_NEWSET 4 /* new bundle set */ |
| 15 |
gregl |
3.1 |
#define DR_ADDSET 5 /* add to current set */ |
| 16 |
gregl |
3.9 |
#define DR_ADJSET 6 /* adjust set quantities */ |
| 17 |
gregl |
3.5 |
#define DR_DELSET 7 /* delete from current set */ |
| 18 |
gregl |
3.9 |
#define DR_KILL 8 /* kill rtrace process(es) */ |
| 19 |
|
|
#define DR_RESTART 9 /* restart rtrace */ |
| 20 |
|
|
#define DR_CLOBBER 10 /* clobber holodeck */ |
| 21 |
gregl |
3.1 |
|
| 22 |
|
|
/* server responses */ |
| 23 |
gregl |
3.9 |
#define DS_BUNDLE 32 /* computed bundle */ |
| 24 |
|
|
#define DS_ACKNOW 33 /* acknowledge request for attention */ |
| 25 |
|
|
#define DS_SHUTDOWN 34 /* end process and close connection */ |
| 26 |
|
|
#define DS_ADDHOLO 35 /* register new holodeck */ |
| 27 |
|
|
#define DS_STARTIMM 36 /* begin immediate bundle set */ |
| 28 |
|
|
#define DS_ENDIMM 37 /* end immediate bundle set */ |
| 29 |
gregl |
3.1 |
|
| 30 |
|
|
/* |
| 31 |
|
|
* Normally, the server channel has priority, with the display process |
| 32 |
|
|
* checking it frequently for new data. However, when the display process |
| 33 |
|
|
* makes a request for attention (DR_ATTEN), the server will finish its |
| 34 |
|
|
* current operations and flush its buffers, sending an acknowledge |
| 35 |
|
|
* message (DS_ACKNOW) when it's done. This then allows the |
| 36 |
|
|
* display process to send a long request to the holodeck server. |
| 37 |
|
|
* Priority returns to normal after the following request. |
| 38 |
|
|
*/ |
| 39 |
|
|
|
| 40 |
gregl |
3.3 |
#ifndef BIGREQSIZ |
| 41 |
|
|
#define BIGREQSIZ 512 /* big request size (bytes) */ |
| 42 |
|
|
#endif |
| 43 |
|
|
|
| 44 |
gregl |
3.1 |
typedef struct { |
| 45 |
|
|
int2 type; /* message type */ |
| 46 |
|
|
int4 nbytes; /* number of additional bytes */ |
| 47 |
|
|
} MSGHEAD; /* message head */ |
| 48 |
gregl |
3.6 |
|
| 49 |
|
|
/* |
| 50 |
|
|
* The display process is started with three arguments. The first argument |
| 51 |
|
|
* is the short name of the holodeck file, appropriate for window naming, etc. |
| 52 |
|
|
* The second and third arguments are the file descriptor numbers assigned to |
| 53 |
|
|
* the server's standard output and input, respectively. The stdin and stdout |
| 54 |
|
|
* of the display process are used for normal communication with the server, |
| 55 |
|
|
* and are connected to pipes going each way. It is entirely appropriate |
| 56 |
|
|
* for the display process to borrow the server's stdin and stdout for reading |
| 57 |
gregl |
3.8 |
* and writing user commands from the list in rhdriver.h. If standard input |
| 58 |
gregl |
3.6 |
* is not available for reading, then a descriptor of -1 will be passed. |
| 59 |
|
|
* The standard output will always be available for writing, though it |
| 60 |
|
|
* may go to /dev/null. |
| 61 |
|
|
*/ |
