| 1 | /* GNU Objective C Runtime Thread Implementation
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| 2 | Copyright (C) 1996, 1997 Free Software Foundation, Inc.
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| 3 | Contributed by Galen C. Hunt ([email protected])
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| 4 | Modified for Mach threads by Bill Bumgarner <[email protected]>
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| 5 | Condition functions added by Mircea Oancea <[email protected]>
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| 6 |
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| 7 | This file is part of GNU CC.
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| 8 |
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| 9 | GNU CC is free software; you can redistribute it and/or modify it under the
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| 10 | terms of the GNU General Public License as published by the Free Software
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| 11 | Foundation; either version 2, or (at your option) any later version.
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| 12 |
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| 13 | GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
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| 14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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| 15 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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| 16 | details.
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| 17 |
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| 18 | You should have received a copy of the GNU General Public License
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| 19 | along with GNU CC; see the file COPYING. If not, write to
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| 20 | the Free Software Foundation, 59 Temple Place - Suite 330,
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| 21 | Boston, MA 02111-1307, USA. */
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| 22 |
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| 23 | /* As a special exception, if you link this library with files compiled with
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| 24 | GCC to produce an executable, this does not cause the resulting executable
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| 25 | to be covered by the GNU General Public License. This exception does not
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| 26 | however invalidate any other reasons why the executable file might be
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| 27 | covered by the GNU General Public License. */
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| 28 |
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| 29 | #include <mach/mach.h>
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| 30 | #include <mach/cthreads.h>
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| 31 | #include <objc/thr.h>
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| 32 | #include "runtime.h"
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| 33 |
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| 34 | /*
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| 35 | Obtain the maximum thread priority that can set for t. Under the
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| 36 | mach threading model, it is possible for the developer to adjust the
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| 37 | maximum priority downward only-- cannot be raised without superuser
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| 38 | privileges. Once lowered, it cannot be raised.
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| 39 | */
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| 40 | static int __mach_get_max_thread_priority(cthread_t t, int *base)
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| 41 | {
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| 42 | thread_t threadP;
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| 43 | kern_return_t error;
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| 44 | struct thread_sched_info info;
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| 45 | unsigned int info_count=THREAD_SCHED_INFO_COUNT;
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| 46 |
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| 47 | if (t == NULL)
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| 48 | return -1;
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| 49 |
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| 50 | threadP = cthread_thread(t); /* get thread underlying */
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| 51 |
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| 52 | error=thread_info(threadP, THREAD_SCHED_INFO,
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| 53 | (thread_info_t)&info, &info_count);
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| 54 |
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| 55 | if (error != KERN_SUCCESS)
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| 56 | return -1;
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| 57 |
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| 58 | if (base != NULL)
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