cloning.c

多线程库

/***************************************************************************
                          cloning.c  -  description
                             -------------------
    begin                : Mon Jan 31 2000
    copyright            : (C) 2000 by 豶n E. Hansen
    email                : [e-mail]
 ***************************************************************************/

/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   * 
 *                                                                         *
 ***************************************************************************/


#include <stdarg.h>
#include <termio.h>
#include <sched.h>
#include <unistd.h>
#include <sys/file.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/resource.h>
#include <malloc.h>
#include <memory.h>
#include <string.h>
#include <pthread.h>
#include <langinfo.h>
#include <libintl.h>
#include <syslog.h>
#include <ctype.h>

#include "cloning.h"

do_clone(int (*_fn)(void *), void *_arg, void **_sp)
{
  char *sp;
  int pid;

  if (*_sp)
    sp = (char *)*_sp;
  else
    sp = malloc(4*PAGE_SIZE);
  if (sp == NULL)
    return -2;
  pid = __clone(_fn, sp+(4*PAGE_SIZE), CLONE_VM|CLONE_FS|CLONE_FILES, _arg);
  if (pid < 0) {
    if (*_sp == NULL)
      free(sp);
    sp = NULL;
  }
  *_sp = (void *)sp;
  return pid;
}