pthread_setspecific.c

很有名的一款用于组织DDoS的恶意机器人程序。仅供研究学习

/*
 * pthread_setspecific.c
 *
 * Description:
 * POSIX thread functions which implement thread-specific data (TSD).
 *
 * --------------------------------------------------------------------------
 *
 *      Pthreads-win32 - POSIX Threads Library for Win32
 *      Copyright(C) 1998 John E. Bossom
 *      Copyright(C) 1999,2003 Pthreads-win32 contributors
 * 
 *      Contact Email: [e-mail]
 * 
 *      The current list of contributors is contained
 *      in the file CONTRIBUTORS included with the source
 *      code distribution. The list can also be seen at the
 *      following World Wide Web location:
 *      http://sources.redhat.com/pthreads-win32/contributors.html
 * 
 *      This library is free software; you can redistribute it and/or
 *      modify it under the terms of the GNU Lesser General Public
 *      License as published by the Free Software Foundation; either
 *      version 2 of the License, or (at your option) any later version.
 * 
 *      This library is distributed in the hope that it will be useful,
 *      but WITHOUT ANY WARRANTY; without even the implied warranty of
 *      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *      Lesser General Public License for more details.
 * 
 *      You should have received a copy of the GNU Lesser General Public
 *      License along with this library in the file COPYING.LIB;
 *      if not, write to the Free Software Foundation, Inc.,
 *      59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

#include "pthread.h"
#include "implement.h"


int
pthread_setspecific (pthread_key_t key, const void *value)
     /*
      * ------------------------------------------------------
      * DOCPUBLIC
      *      This function sets the value of the thread specific
      *	     key in the calling thread.
      *
      * PARAMETERS
      *      key
      *              an instance of pthread_key_t
      *	     value
      *		     the value to set key to
      *
      *
      * DESCRIPTION
      *      This function sets the value of the thread specific
      *      key in the calling thread.
      *
      * RESULTS
      *              0               successfully set value
      *              EAGAIN          could not set value
      *              ENOENT          SERIOUS!!
      *
      * ------------------------------------------------------
      */
{
  pthread_t self;
  int result = 0;

  if (key != ptw32_selfThreadKey)
    {
      /*
       * Using pthread_self will implicitly create
       * an instance of pthread_t for the current
       * thread if one wasn't explicitly created
       */
      self = pthread_self ();
      if (self == NULL)
        {
          return ENOENT;
        }
    }
  else
    {
      /*
       * Resolve catch-22 of registering thread with selfThread
       * key
       */
      self = (pthread_t) pthread_getspecific (ptw32_selfThreadKey);
      if (self == NULL)
        {
          self = (pthread_t) value;
        }
    }

  result = 0;

  if (key != NULL)
    {
      ThreadKeyAssoc *assoc;

      if (self != NULL &&
          key->destructor != NULL &&
          value != NULL)
        {
          /*
           * Only require associations if we have to
           * call user destroy routine.
           * Don't need to locate an existing association
           * when setting data to NULL for WIN32 since the
           * data is stored with the operating system; not
           * on the association; setting assoc to NULL short
           * circuits the search.
           */
          assoc = (ThreadKeyAssoc *) self->keys;
          /*
           * Locate existing association
           */
          while (assoc != NULL)
            {
              if (assoc->key == key)
                {
                  /*
                   * Association already exists
                   */
                  break;
                }
              assoc = assoc->nextKey;
            }

          /*
           * create an association if not found
           */
	  if (assoc == NULL)
	    {
	      result = ptw32_tkAssocCreate (&assoc, self, key);
	    }
        }

      if (result == 0)
        {
          if ( ! TlsSetValue (key->key, (LPVOID) value))
	    {
	      result = EAGAIN;
	    }
        }
    }

  return (result);
}                               /* pthread_setspecific */