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/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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/* SCCSid "$SunId$ SGI" */ |
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|
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/* |
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* Header for holodeck display drivers. |
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*/ |
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|
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/* display requests */ |
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#define DR_NOOP 0 /* to release from vain DR_ATTEN */ |
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#define DR_BUNDLE 1 /* bundle request */ |
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#define DR_ATTEN 2 /* request for attention */ |
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#define DR_SHUTDOWN 3 /* shutdown request */ |
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#define DR_NEWSET 4 /* new bundle set */ |
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#define DR_ADDSET 5 /* add to current set */ |
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#define DR_DELSET 6 /* delete from current set */ |
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|
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/* server responses */ |
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#define DS_BUNDLE 7 /* computed bundle */ |
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#define DS_ACKNOW 8 /* acknowledge request for attention */ |
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#define DS_SHUTDOWN 9 /* end process and close connection */ |
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#define DS_ADDHOLO 10 /* register new holodeck */ |
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#define DS_STARTIMM 11 /* begin immediate bundle set */ |
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#define DS_ENDIMM 12 /* end immediate bundle set */ |
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/* |
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* Normally, the server channel has priority, with the display process |
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* checking it frequently for new data. However, when the display process |
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* makes a request for attention (DR_ATTEN), the server will finish its |
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* current operations and flush its buffers, sending an acknowledge |
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* message (DS_ACKNOW) when it's done. This then allows the |
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* display process to send a long request to the holodeck server. |
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* Priority returns to normal after the following request. |
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*/ |
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#ifndef BIGREQSIZ |
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#define BIGREQSIZ 512 /* big request size (bytes) */ |
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#endif |
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|
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typedef struct { |
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int2 type; /* message type */ |
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int4 nbytes; /* number of additional bytes */ |
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} MSGHEAD; /* message head */ |
