09/13/82  timed_io_

Function: performs I/O operations which must complete within a
specified time interval.  The user should be familiar with the use of
the subroutine iox_.

Each entry point documented here has an argument denoting the
particular I/O switch involved in the operation, and an argument whose
value is the duration of the period the caller is willing to wait for
the completion of the I/O operation, in microseconds.


Entry points in timed_io_:
   (List is generated by the help command)


:Entry:  get_chars:  09/13/82 timed_io_$get_chars

Function: performs the function of iox_$get_chars; if the operation
does not complete within the specified time interval, the error code
error_table_$timeout is returned to the caller.


Syntax:
declare timed_io_$get_chars entry (ptr, fixed bin (71), ptr, 
     fixed bin (21), fixed bin (21), fixed bin (35));
call timed_io_$get_chars (iocb_ptr, timeout, buff_ptr, n, n_read, code);


Arguments:
iocb_ptr, buff_ptr, n, n_read, and code are as described in the iox_
     documentation.
timeout
     is the period in microseconds during which the caller is willing
     to wait for the completion of the get_chars call.


:Entry:  get_line:  09/13/82 timed_io_$get_line

Function: performs the function of iox_$get_line; if the operation
does not complete within the specified time interval, the error code
error_table_$timeout is returned to the caller.


Syntax:
declare timed_io_$get_line entry (ptr, fixed bin (71), ptr, 
     fixed bin (21), fixed bin (21), fixed bin (35));
call timed_io_$get_line (iocb_ptr, timeout, buff_ptr, buff_len, n_read, code);


Arguments:
iocb_ptr, buff_ptr, buff_len, n_read, and code are as described in the iox_
     documentation.
timeout
     is the period in microseconds during which the caller is willing
     to wait for the completion of the get_line call.


:Entry:  put_chars:  09/13/82 timed_io_$put_chars


Function: performs the function of iox_$put_chars; if the operation
does not complete within the specified time interval, the error code
error_table_$timeout is returned to the caller.


Syntax:
declare timed_io_$put_chars entry (ptr, fixed bin (71), ptr, 
     fixed bin (21), fixed bin (21), fixed bin (35));
call timed_io_$put_chars (iocb_ptr, timeout, buff_ptr, n, n_written, code);


Arguments:
iocb_ptr, buff_ptr, n, and code are as described in the iox_
     documentation.
timeout
     is the period in microseconds during which the caller is willing
     to wait for the completion of the put_chars call.
n_written
     is the number of characters actually written to the switch before
     the timeout period expired.


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Historical Background

This edition of the Multics software materials and documentation is provided and donated
to Massachusetts Institute of Technology by Group BULL including BULL HN Information Systems Inc. 
as a contribution to computer science knowledge.  
This donation is made also to give evidence of the common contributions of Massachusetts Institute of Technology,
Bell Laboratories, General Electric, Honeywell Information Systems Inc., Honeywell BULL Inc., Groupe BULL
and BULL HN Information Systems Inc. to the development of this operating system. 
Multics development was initiated by Massachusetts Institute of Technology Project MAC (1963-1970),
renamed the MIT Laboratory for Computer Science and Artificial Intelligence in the mid 1970s, under the leadership
of Professor Fernando Jose Corbato. Users consider that Multics provided the best software architecture 
for managing computer hardware properly and for executing programs. Many subsequent operating systems 
incorporated Multics principles.
Multics was distributed in 1975 to 2000 by Group Bull in Europe , and in the U.S. by Bull HN Information Systems Inc., 
as successor in interest by change in name only to Honeywell Bull Inc. and Honeywell Information Systems Inc. .

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Permission to use, copy, modify, and distribute these programs and their documentation for any purpose and without
fee is hereby granted,provided that the below copyright notice and historical background appear in all copies
and that both the copyright notice and historical background and this permission notice appear in supporting
documentation, and that the names of MIT, HIS, BULL or BULL HN not be used in advertising or publicity pertaining
to distribution of the programs without specific prior written permission.
    Copyright 1972 by Massachusetts Institute of Technology and Honeywell Information Systems Inc.
    Copyright 2006 by BULL HN Information Systems Inc.
    Copyright 2006 by Bull SAS
    All Rights Reserved