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- 1.1
- date 92.05.14.19.55.40; author mwild; state Exp;
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- desc
- @get task priority (in **IX interpretation, negative means high)
- @
-
-
- 1.1
- log
- @Initial revision
- @
- text
- @/*
- * This file is part of ixemul.library for the Amiga.
- * Copyright (C) 1991, 1992 Markus M. Wild
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * $Id$
- *
- * $Log$
- */
-
- #define KERNEL
- #include "ixemul.h"
-
- #include <sys/time.h>
- #include <sys/resource.h>
-
- /* REMARK: all priorities are negated, since on the Amiga, lower
- * priorities mean less power, not more power.. */
-
- int
- getpriority (int which, int who)
- {
- if (who < PRIO_PROCESS || who > PRIO_USER)
- {
- errno = EINVAL;
- return -1;
- }
-
- if (which == PRIO_USER || who == 0)
- {
- struct Task *myself = (struct Task *)FindTask (0);
- /* in this case I ignore the 'which' argument, and just return
- * my own Priority */
- return - myself->tc_Node.ln_Pri;
- }
-
- /* so we look for processes. I ignore a difference between processes
- * and process-groups.. */
-
- /* try to validate, that the given pid is really a task-pointer */
- /* a pointer has to be word-aligned */
- if (!(who & 1))
- {
- struct Task *task = (struct Task *)who;
- /* it must have a node-type of either NT_PROCESS or NT_TASK */
- if (task->tc_Node.ln_Type == NT_PROCESS ||
- task->tc_Node.ln_Type == NT_TASK)
- /* so we have to believe, this is really a task */
- return - task->tc_Node.ln_Pri;
- }
- errno = ESRCH;
- return -1;
- }
- @
-