Документ взят из кэша поисковой машины. Адрес оригинального документа : http://www.atnf.csiro.au/computing/software/gipsy/sub/deputy.dc2 Дата изменения: Mon Feb 5 07:28:24 2001 Дата индексирования: Fri Jan 16 01:14:57 2009 Кодировка: Поисковые слова: mars polar lander

Subroutine: DEPUTY

Purpose: Start a task which temporarily assumes the role of the
calling task.

Category: SYSTEM, USER-INTERFACE

File: srvreq.c

Author: J.P. Terlouw

Use: CALL DEPUTY( STRING, Input character
IRC ) Output integer

STRING character string containing a servant task name.
IRC return code containing information about the
fate of the command.
1 successful execution
-6 task not present
-7 max number of tasks already active

User-initiated aborts, crashes and fatal calls
to ERROR cause a non event-driven task
to exit. In the latter case the caller
never regains control.
Event-driven tasks always regain control.
For these the following codes are also defined:
-8 fatal error
-9 user abort
-10 crash
-11 aborted due to no-default user input request

Description: After a call to DEPUTY the calling task is suspended
until the called task is finished.
The same set of keywords applies to all tasks spawned
from successive calls to deputy. The keyword table is
common to all tasks in the chain. Both calling and
called tasks can obtain information from the
keyword list using USRINP and provide and/or modify
keywords using CANCEL or WKEY.

Limitation: Keywords cannot be specified in the call to DEPUTY.

Example: CALL DEPUTY('KIJK',IRC)

Related docs: WKEY.DC2 SUBST.DC2 XEQ.DC2

Updates: Aug 10, 1981: JPT, Original document.
Feb 15, 1990: JPT, Portable version, rewritten in ANSI C.
Jun 10, 1998: JPT, Added event-driven task codes.