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ptw32_tkAssocDestroy.c
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ptw32_tkAssocDestroy.c
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/*
* ptw32_tkAssocDestroy.c
*
* Description:
* This translation unit implements routines which are private to
* the implementation and may be used throughout it.
*
* --------------------------------------------------------------------------
*
* Pthreads-win32 - POSIX Threads Library for Win32
* Copyright(C) 1998 John E. Bossom
* Copyright(C) 1999,2005 Pthreads-win32 contributors
*
* Contact Email: rpj@callisto.canberra.edu.au
*
* 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"
void
ptw32_tkAssocDestroy (ThreadKeyAssoc * assoc)
/*
* -------------------------------------------------------------------
* This routine releases all resources for the given ThreadKeyAssoc
* once it is no longer being referenced
* ie) either the key or thread has stopped referencing it.
*
* Parameters:
* assoc
* an instance of ThreadKeyAssoc.
* Returns:
* N/A
* -------------------------------------------------------------------
*/
{
/*
* Both key->keyLock and thread->threadLock are locked before
* entry to this routine.
*/
if (assoc != NULL)
{
ThreadKeyAssoc * prev, * next;
/* Remove assoc from thread's keys chain */
prev = assoc->prevKey;
next = assoc->nextKey;
if (prev != NULL)
{
prev->nextKey = next;
}
if (next != NULL)
{
next->prevKey = prev;
}
if (assoc->thread->keys == assoc)
{
/* We're at the head of the thread's keys chain */
assoc->thread->keys = next;
}
if (assoc->thread->nextAssoc == assoc)
{
/*
* Thread is exiting and we're deleting the assoc to be processed next.
* Hand thread the assoc after this one.
*/
assoc->thread->nextAssoc = next;
}
/* Remove assoc from key's threads chain */
prev = assoc->prevThread;
next = assoc->nextThread;
if (prev != NULL)
{
prev->nextThread = next;
}
if (next != NULL)
{
next->prevThread = prev;
}
if (assoc->key->threads == assoc)
{
/* We're at the head of the key's threads chain */
assoc->key->threads = next;
}
free (assoc);
}
} /* ptw32_tkAssocDestroy */