source: trunk/kernel/syscalls/sys_thread_wakeup.c @ 506

Last change on this file since 506 was 506, checked in by viala@…, 3 years ago

[syscalls] add interface in implementation.

Add const where possible, fix protoypes to follow interface.

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 enter / activate thread %x in process %x / cycle %d\n",
44__FUNCTION__ , this, trdid, this->process->pid, (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_THREAD_MAX_PER_CLUSTER) || cluster_is_undefined( target_cxy ) ) 
53        {
54
55#if DEBUG_SYSCALLS_ERROR
56printk("\n[ERROR] in %s : illegal trdid argument %x\n", __FUNCTION__, trdid );
57#endif
58                this->errno = EINVAL;
59                return -1;
60        }
61
62    // get extended pointer on target thread
63    xptr_t thread_xp = thread_get_xptr( process->pid , trdid );
64
65    if( thread_xp == XPTR_NULL )
66    {
67
68#if DEBUG_SYSCALLS_ERROR
69printk("\n[ERROR] in %s : cannot find thread %x in process %x/n",
70__FUNCTION__ , trdid , this->process->pid );
71#endif
72        CURRENT_THREAD->errno = EINVAL;
73        return -1;
74    }
75
76    // unblock target thread
77    thread_unblock( thread_xp , THREAD_BLOCKED_GLOBAL );
78
79#if DEBUG_SYS_THREAD_WAKEUP
80tm_end = hal_get_cycles();
81if( DEBUG_SYS_THREAD_WAKEUP < tm_end )
82printk("\n[DBG] %s : thread %x exit / thread %x in process %x activated / cycle %d\n",
83__FUNCTION__ , this, trdid, this->process->pid, (uint32_t)tm_end );
84#endif
85
86    return 0;
87
88}  // end sys_thread_wakeup()
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