source: trunk/kernel/syscalls/sys_thread_wakeup.c @ 574

Last change on this file since 574 was 566, checked in by alain, 6 years ago

Complete restructuration of kernel locks.

File size: 2.6 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_kernel_types.h>
25#include <thread.h>
26#include <printk.h>
27#include <process.h>
28#include <errno.h>
29
30#include <syscalls.h>
31
32//////////////////////////////////////
33int sys_thread_wakeup( trdid_t trdid )
34{
35        thread_t  * this    = CURRENT_THREAD;
36    process_t * process = this->process;
37
38#if DEBUG_SYS_THREAD_WAKEUP
39uint64_t     tm_start;
40uint64_t     tm_end;
41tm_start = hal_get_cycles();
42if( DEBUG_SYS_THREAD_WAKEUP < tm_start )
43printk("\n[DBG] %s : thread %x in process enter to activate thread %x / cycle %d\n",
44__FUNCTION__, this->trdid, process->pid, trdid, (uint32_t)tm_start );
45#endif
46
47    // get target thread ltid and cxy
48    ltid_t   target_ltid = LTID_FROM_TRDID( trdid );
49    cxy_t    target_cxy  = CXY_FROM_TRDID( trdid );
50
51    // check trdid argument
52        if( (target_ltid >= CONFIG_THREADS_MAX_PER_CLUSTER) || cluster_is_undefined( target_cxy ) ) 
53        {
54
55#if DEBUG_SYSCALLS_ERROR
56printk("\n[ERROR] in %s : thread %x in process %x / illegal trdid argument %x\n",
57__FUNCTION__, this->trdid, process->pid, trdid );
58#endif
59                this->errno = EINVAL;
60                return -1;
61        }
62
63    // get extended pointer on target thread
64    xptr_t thread_xp = thread_get_xptr( process->pid , trdid );
65
66    if( thread_xp == XPTR_NULL )
67    {
68
69#if DEBUG_SYSCALLS_ERROR
70printk("\n[ERROR] in %s : thread %x in process %x cannot find thread %x/n",
71__FUNCTION__ , this->trdid, process->pid, trdid );
72#endif
73        CURRENT_THREAD->errno = EINVAL;
74        return -1;
75    }
76
77    // unblock target thread
78    thread_unblock( thread_xp , THREAD_BLOCKED_GLOBAL );
79
80#if DEBUG_SYS_THREAD_WAKEUP
81tm_end = hal_get_cycles();
82if( DEBUG_SYS_THREAD_WAKEUP < tm_end )
83printk("\n[DBG] %s : thread %x in process %x exit / thread %x activated / cycle %d\n",
84__FUNCTION__ , this->trdid, process->pid, trdid, (uint32_t)tm_end );
85#endif
86
87    return 0;
88
89}  // end sys_thread_wakeup()
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