source: trunk/kernel/syscalls/sys_thread_wakeup.c @ 637

Last change on this file since 637 was 637, checked in by alain, 3 years ago

Introduce the non-standard pthread_parallel_create() system call
and re-write the <fft> and <sort> applications to improve the
intrinsic paralelism in applications.

File size: 2.9 KB
Line 
1/*
2 * sys_thread_wakeup.c - wakeup indicated thread
3 *
4 * Author    Alain Greiner (2016,2017,2018,2019)
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 || CONFIG_INSTRUMENTATION_SYSCALLS)
39uint64_t     tm_start = hal_get_cycles();
40#endif
41
42#if DEBUG_SYS_THREAD_WAKEUP
43if( DEBUG_SYS_THREAD_WAKEUP < tm_start )
44printk("\n[%s] thread %x in process enter to activate thread %x / cycle %d\n",
45__FUNCTION__, this->trdid, process->pid, trdid, (uint32_t)tm_start );
46#endif
47
48    // get target thread ltid and cxy
49    ltid_t   target_ltid = LTID_FROM_TRDID( trdid );
50    cxy_t    target_cxy  = CXY_FROM_TRDID( trdid );
51
52    // check trdid argument
53        if( (target_ltid >= CONFIG_THREADS_MAX_PER_CLUSTER) ||
54        (cluster_is_active( target_cxy ) == false) ) 
55        {
56
57#if DEBUG_SYSCALLS_ERROR
58printk("\n[ERROR] in %s : thread %x in process %x / illegal trdid argument %x\n",
59__FUNCTION__, this->trdid, process->pid, trdid );
60#endif
61                this->errno = EINVAL;
62                return -1;
63        }
64
65    // get extended pointer on target thread
66    xptr_t thread_xp = thread_get_xptr( process->pid , trdid );
67
68    if( thread_xp == XPTR_NULL )
69    {
70
71#if DEBUG_SYSCALLS_ERROR
72printk("\n[ERROR] in %s : thread %x in process %x cannot find thread %x/n",
73__FUNCTION__ , this->trdid, process->pid, trdid );
74#endif
75        CURRENT_THREAD->errno = EINVAL;
76        return -1;
77    }
78
79    // unblock target thread
80    thread_unblock( thread_xp , THREAD_BLOCKED_GLOBAL );
81
82#if (DEBUG_SYS_THREAD_WAKEUP || CONFIG_INSTRUMENTATION_SYSCALLS)
83uint64_t     tm_end = hal_get_cycles();
84#endif
85
86
87#if DEBUG_SYS_THREAD_WAKEUP
88if( DEBUG_SYS_THREAD_WAKEUP < tm_end )
89printk("\n[%s] thread %x in process %x exit / thread %x activated / cycle %d\n",
90__FUNCTION__ , this->trdid, process->pid, trdid, (uint32_t)tm_end );
91#endif
92
93#if CONFIG_INSTRUMENTATION_SYSCALLS
94hal_atomic_add( &syscalls_cumul_cost[SYS_THREAD_WAKEUP] , tm_end - tm_start );
95hal_atomic_add( &syscalls_occurences[SYS_THREAD_WAKEUP] , 1 );
96#endif
97
98    return 0;
99
100}  // end sys_thread_wakeup()
Note: See TracBrowser for help on using the repository browser.