libpthread/create.c

   1 /*
   2  *  ZeX/OS
   3  *  Copyright (C) 2008  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   4  *  Copyright (C) 2010  Tomas 'ZeXx86' Jedrzejek (zexx86@zexos.org)
   5  *
   6  *  This program is free software: you can redistribute it and/or modify
   7  *  it under the terms of the GNU General Public License as published by
   8  *  the Free Software Foundation, either version 3 of the License, or
   9  *  (at your option) any later version.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20
  21 #include <pthread.h>
  22
  23 int pthread_create (pthread_t *thread, const pthread_attr_t *attr, void *(*start_routine) (void *), void *arg)
  24 {
  25         *SYSV_THREADOPEN = (unsigned) arg;
  26
  27         asm volatile (
  28                 "movl $50, %%eax;"
  29                 "movl %0, %%ebx;"
  30                 "int $0x80;" :: "b" (start_routine) : "%eax", "memory");
  31
  32         unsigned *ret = SYSV_THREADOPEN;
  33
  34         if (!ret)
  35                 return -1;
  36
  37         thread->start_routine = start_routine;
  38         thread->arg = arg;
  39         thread->attr = (pthread_attr_t *) attr;
  40
  41         if (*ret == 1)
  42                 return 0;
  43
  44         return -1;
  45 }