source: trunk/kernel/syscalls/sys_thread_wakeup.c @ 459

Last change on this file since 459 was 457, checked in by alain, 3 years ago

This version modifies the exec syscall and fixes a large number of small bugs.
The version number has been updated (0.1)

File size: 2.5 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//////////////////////////////////////
31int sys_thread_wakeup( trdid_t trdid )
32{
33        thread_t  * this    = CURRENT_THREAD;
34    process_t * process = this->process;
35
36#if DEBUG_SYS_THREAD_WAKEUP
37uint64_t     tm_start;
38uint64_t     tm_end;
39tm_start = hal_get_cycles();
40if( DEBUG_SYS_THREAD_WAKEUP < tm_start )
41printk("\n[DBG] %s : thread %x enter / activate thread %x in process %x / cycle %d\n",
42__FUNCTION__ , this, trdid, this->process->pid, (uint32_t)tm_start );
43#endif
44
45    // get target thread ltid and cxy
46    ltid_t   target_ltid = LTID_FROM_TRDID( trdid );
47    cxy_t    target_cxy  = CXY_FROM_TRDID( trdid );
48
49    // check trdid argument
50        if( (target_ltid >= CONFIG_THREAD_MAX_PER_CLUSTER) || cluster_is_undefined( target_cxy ) ) 
51        {
52
53#if DEBUG_SISCALLS_ERROR
54printk("\n[ERROR] in %s : illegal trdid argument %x\n", __FUNCTION__, trdid );
55#endif
56                this->errno = EINVAL;
57                return -1;
58        }
59
60    // get extended pointer on target thread
61    xptr_t thread_xp = thread_get_xptr( process->pid , trdid );
62
63    if( thread_xp == XPTR_NULL )
64    {
65
66#if DEBUG_SISCALLS_ERROR
67printk("\n[ERROR] in %s : cannot find thread %x in process %x/n",
68__FUNCTION__ , trdid , this->process->pid );
69#endif
70        CURRENT_THREAD->errno = EINVAL;
71        return -1;
72    }
73
74    // unblock target thread
75    thread_unblock( thread_xp , THREAD_BLOCKED_GLOBAL );
76
77#if DEBUG_SYS_THREAD_WAKEUP
78tm_end = hal_get_cycles();
79if( DEBUG_SYS_THREAD_WAKEUP < tm_end )
80printk("\n[DBG] %s : thread %x exit / thread %x in process %x activated / cycle %d\n",
81__FUNCTION__ , this, trdid, this->process->pid, (uint32_t)tm_end );
82#endif
83
84    return 0;
85
86}  // end sys_thread_wakeup()
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