source: trunk/kernel/syscalls/sys_thread_wakeup.c @ 566

Last change on this file since 566 was 566, checked in by alain, 3 years ago

Complete restructuration of kernel locks.

File size: 2.6 KB
RevLine 
[1]1/*
[23]2 * sys_thread_wakeup.c - wakeup all indicated threads
[1]3 *
[23]4 * Author    Alain Greiner (2016,2017)
[1]5 *
[23]6 * Copyright (c) UPMC Sorbonne Universites
[1]7 *
[23]8 * This file is part of ALMOS-MKH.
9 *
10 * ALMOS-MKH is free software; you can redistribute it and/or modify it
[1]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 *
[23]14 * ALMOS-MKH is distributed in the hope that it will be useful, but
[1]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
[23]20 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
[1]21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
[457]24#include <hal_kernel_types.h>
[23]25#include <thread.h>
26#include <printk.h>
27#include <process.h>
[1]28#include <errno.h>
29
[506]30#include <syscalls.h>
31
[23]32//////////////////////////////////////
33int sys_thread_wakeup( trdid_t trdid )
[1]34{
[23]35        thread_t  * this    = CURRENT_THREAD;
36    process_t * process = this->process;
[1]37
[438]38#if DEBUG_SYS_THREAD_WAKEUP
[436]39uint64_t     tm_start;
40uint64_t     tm_end;
41tm_start = hal_get_cycles();
[438]42if( DEBUG_SYS_THREAD_WAKEUP < tm_start )
[566]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 );
[436]45#endif
46
[23]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 );
[1]50
[23]51    // check trdid argument
[566]52        if( (target_ltid >= CONFIG_THREADS_MAX_PER_CLUSTER) || cluster_is_undefined( target_cxy ) ) 
[1]53        {
[436]54
[467]55#if DEBUG_SYSCALLS_ERROR
[566]56printk("\n[ERROR] in %s : thread %x in process %x / illegal trdid argument %x\n",
57__FUNCTION__, this->trdid, process->pid, trdid );
[436]58#endif
[23]59                this->errno = EINVAL;
60                return -1;
[1]61        }
62
[23]63    // get extended pointer on target thread
64    xptr_t thread_xp = thread_get_xptr( process->pid , trdid );
[1]65
[23]66    if( thread_xp == XPTR_NULL )
67    {
[436]68
[467]69#if DEBUG_SYSCALLS_ERROR
[566]70printk("\n[ERROR] in %s : thread %x in process %x cannot find thread %x/n",
71__FUNCTION__ , this->trdid, process->pid, trdid );
[436]72#endif
[23]73        CURRENT_THREAD->errno = EINVAL;
74        return -1;
75    }
[1]76
[23]77    // unblock target thread
78    thread_unblock( thread_xp , THREAD_BLOCKED_GLOBAL );
[1]79
[438]80#if DEBUG_SYS_THREAD_WAKEUP
[436]81tm_end = hal_get_cycles();
[438]82if( DEBUG_SYS_THREAD_WAKEUP < tm_end )
[566]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 );
[436]85#endif
86
[23]87    return 0;
[436]88
[23]89}  // end sys_thread_wakeup()
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