source: trunk/kernel/syscalls/sys_thread_detach.c @ 1

Last change on this file since 1 was 1, checked in by alain, 5 years ago

First import

File size: 1.9 KB
Line 
1/*
2 * kern/sys_thread_detach.c - detach a joinable thread
3 *
4 * Copyright (c) 2008,2009,2010,2011,2012 Ghassan Almaless
5 * Copyright (c) 2011,2012 UPMC Sorbonne Universites
6 *
7 * This file is part of ALMOS-kernel.
8 *
9 * ALMOS-kernel is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2.0 of the License.
12 *
13 * ALMOS-kernel is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with ALMOS-kernel; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#include <list.h>
24#include <thread.h>
25#include <kmem.h>
26#include <kmagics.h>
27#include <errno.h>
28#include <task.h>
29#include <spinlock.h>
30
31int sys_thread_detach (pthread_t tid)
32{
33        register struct task_s *task;
34        struct thread_s *target_th;
35        uint_t state;
36        error_t err;
37
38        task = current_task;
39
40        if(tid > task->max_order)
41        {
42                err = EINVAL;
43                goto fail_arg;
44        }
45 
46        spinlock_lock(&task->th_lock);
47
48        target_th = task->th_tbl[tid];
49   
50        if((target_th == NULL)                 ||
51           (target_th->signature != THREAD_ID) || 
52           (target_th->info.attr.key != tid))
53        {
54                err = ESRCH;
55                goto fail_srch;
56        }
57 
58        if(!(thread_isJoinable(target_th)))
59        {
60                err = EINVAL;
61                goto fail_not_joinable;
62        }
63 
64        err = 0;
65
66        spinlock_lock(&target_th->lock);
67
68        thread_clear_joinable(target_th);
69
70        if((target_th->info.join == NULL) && 
71           !(state = wait_queue_isEmpty(&target_th->info.wait_queue)))
72        {
73                wakeup_one(&target_th->info.wait_queue, WAIT_ANY);
74        }
75
76        spinlock_unlock(&target_th->lock);
77 
78fail_not_joinable:
79fail_srch:
80        spinlock_unlock(&task->lock);
81
82fail_arg:
83        current_thread->info.errno = err;
84        return err;
85}
Note: See TracBrowser for help on using the repository browser.