| 1 | /*
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| 2 | * sys_thread_exit.c - terminates the execution of calling thread
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| 3 | *
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| 4 | * Authors Alain Greiner (2016,2017)
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| 5 | *
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| 6 | * Copyright (c) UPMC Sorbonne Universites
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| 7 | *
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| 8 | * This file is part of ALMOS-MKH.
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| 9 | *
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| 10 | * ALMOS-MKH is free software; you can redistribute it and/or modify it
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| 11 | * under the terms of the GNU General Public License as published by
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| 12 | * the Free Software Foundation; version 2.0 of the License.
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| 13 | *
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| 14 | * ALMOS-MKH is distributed in the hope that it will be useful, but
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| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of
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| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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| 17 | * General Public License for more details.
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| 18 | *
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| 19 | * You should have received a copy of the GNU General Public License
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| 20 | * along with ALMOS-MKH; if not, write to the Free Software Foundation,
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| 21 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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| 22 | */
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| 23 |
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| 24 | #include <hal_types.h>
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| 25 | #include <thread.h>
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| 26 | #include <core.h>
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| 27 | #include <vmm.h>
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| 28 | #include <scheduler.h>
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| 29 | #include <printk.h>
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| 30 |
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| 31 | ////////////////////////////////////////
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| 32 | int sys_thread_exit( void * exit_value )
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| 33 | {
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| 34 | thread_t * this = CURRENT_THREAD;
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| 35 | process_t * process = this->process;
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| 36 |
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| 37 | // check exit_value argument
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| 38 | if( exit_value != NULL )
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| 39 | {
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| 40 |
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| 41 | #if DEBUG_SYSCALLS_ERROR
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| 42 | printk("\n[ERROR] in %s : exit_value argument must be NULL for thread %x in process %x\n",
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| 43 | __FUNCTION__ , exit_value, this->trdid , process->pid );
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| 44 | #endif
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| 45 | this->errno = EINVAL;
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| 46 | return -1;
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| 47 | }
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| 48 |
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| 49 | #if DEBUG_SYS_THREAD_EXIT
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| 50 | uint64_t tm_start;
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| 51 | uint64_t tm_end;
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| 52 | tm_start = hal_get_cycles();
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| 53 | if( DEBUG_SYS_THREAD_EXIT < tm_start )
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| 54 | printk("\n[DBG] %s : thread %x enter / process %x / cycle %d\n",
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| 55 | __FUNCTION__ , this, process->pid , (uint32_t)tm_start );
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| 56 | #endif
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| 57 |
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| 58 | // cal the relevant kernel function
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| 59 | thread_kill( XPTR( local_cxy , this ),
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| 60 | 1, // is_exit
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| 61 | 0 ); // is forced
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| 62 |
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| 63 | #if DEBUG_SYS_THREAD_EXIT
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| 64 | tm_end = hal_get_cycles();
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| 65 | if( DEBUG_SYS_THREAD_EXIT < tm_end )
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| 66 | printk("\n[DBG] %s : thread %x exit / process %x / cost %d / cycle %d\n",
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| 67 | __FUNCTION__, this, this->process->pid, (uint32_t)(tm_end - tm_start), (uint32_t)tm_end );
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| 68 | #endif
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| 69 |
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| 70 | // deschedule <=> suicide, because blocked by thread_kill()
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| 71 | sched_yield( "suicide after thread_exit" );
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| 72 |
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| 73 | return 0; // never executed but required by compiler
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| 74 |
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| 75 | } // end sys_thread exit
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