| 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 |
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| 5 | This file is part of GNU CC.
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| 6 |
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| 7 | GNU CC is free software; you can redistribute it and/or modify it under the
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| 8 | terms of the GNU General Public License as published by the Free Software
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| 9 | Foundation; either version 2, or (at your option) any later version.
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| 10 |
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| 11 | GNU CC is distributed in the hope that it will be useful, but WITHOUT ANY
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| 12 | WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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| 13 | FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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| 14 | details.
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| 15 |
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| 16 | You should have received a copy of the GNU General Public License along with
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| 17 | GNU CC; see the file COPYING. If not, write to the Free Software
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| 18 | Foundation, 59 Temple Place - Suite 330,
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| 19 | Boston, MA 02111-1307, USA. */
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| 20 |
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| 21 | /* As a special exception, if you link this library with files compiled with
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| 22 | GCC to produce an executable, this does not cause the resulting executable
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| 23 | to be covered by the GNU General Public License. This exception does not
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| 24 | however invalidate any other reasons why the executable file might be
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| 25 | covered by the GNU General Public License. */
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| 26 |
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| 27 | #include <objc/thr.h>
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| 28 | #include "runtime.h"
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| 29 |
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| 30 | /* Thread local storage for a single thread */
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| 31 | static void *thread_local_storage = NULL;
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| 32 |
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| 33 | /* Backend initialization functions */
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| 34 |
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| 35 | /* Initialize the threads subsystem. */
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| 36 | int
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| 37 | __objc_init_thread_system(void)
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| 38 | {
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| 39 | /* No thread support available */
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| 40 | return -1;
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| 41 | }
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| 42 |
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| 43 | /* Close the threads subsystem. */
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| 44 | int
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| 45 | __objc_close_thread_system(void)
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| 46 | {
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| 47 | /* No thread support available */
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| 48 | return -1;
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| 49 | }
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| 50 |
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| 51 | /* Backend thread functions */
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| 52 |
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| 53 | /* Create a new thread of execution. */
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| 54 | objc_thread_t
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| 55 | __objc_thread_detach(void (*func)(void *arg), void *arg)
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| 56 | {
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| 57 | /* No thread support available */
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| 58 | return NULL;
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| 59 | }
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| 60 |
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| 61 | /* Set the current thread's priority. */
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| 62 | int
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| 63 | __objc_thread_set_priority(int priority)
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| 64 | {
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| 65 | /* No thread support available */
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| 66 | return -1;
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| 67 | }
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| 68 |
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| 69 | /* Return the current thread's priority. */
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| 70 | int
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| 71 | __objc_thread_get_priority(void)
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| 72 | {
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| 73 | return OBJC_THREAD_INTERACTIVE_PRIORITY;
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| 74 | }
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| 75 |
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| 76 | /* Yield our process time to another thread. */
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| 77 | void
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| 78 | __objc_thread_yield(void)
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