source: trunk/kernel/syscalls/sys_thread_wakeup.c @ 23

Last change on this file since 23 was 23, checked in by alain, 5 years ago

Introduce syscalls.

File size: 1.9 KB
Line 
1/*
2 * sys_thread_wakeup.c - wakeup all indicated threads
3 *
4 * Author    Alain Greiner (2016,2017)
5 *
6 * Copyright (c) UPMC Sorbonne Universites
7 *
8 * This file is part of ALMOS-MKH.
9 *
10 * ALMOS-MKH is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2.0 of the License.
13 *
14 * ALMOS-MKH is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#include <hal_types.h>
25#include <thread.h>
26#include <printk.h>
27#include <process.h>
28#include <errno.h>
29
30//////////////////////////////////////
31int sys_thread_wakeup( trdid_t trdid )
32{
33        thread_t  * this    = CURRENT_THREAD;
34    process_t * process = this->process;
35
36    // get target thread ltid and cxy
37    ltid_t   target_ltid = LTID_FROM_TRDID( trdid );
38    cxy_t    target_cxy  = CXY_FROM_TRDID( trdid );
39
40    // check trdid argument
41        if( (target_ltid >= CONFIG_THREAD_MAX_PER_CLUSTER) || cluster_is_undefined( target_cxy ) ) 
42        {
43        printk("\n[ERROR] in %s : illegal trdid argument\n", __FUNCTION__ );
44                this->errno = EINVAL;
45                return -1;
46        }
47
48    // get extended pointer on target thread
49    xptr_t thread_xp = thread_get_xptr( process->pid , trdid );
50
51    if( thread_xp == XPTR_NULL )
52    {
53        printk("\n[ERROR] in %s : cannot find thread %x in process %x/n",
54               __FUNCTION__ , trdid , CURRENT_THREAD->process->pid );
55        CURRENT_THREAD->errno = EINVAL;
56        return -1;
57    }
58
59    // unblock target thread
60    thread_unblock( thread_xp , THREAD_BLOCKED_GLOBAL );
61
62    return 0;
63}  // end sys_thread_wakeup()
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