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Diffstat (limited to 'pthreads/src/ptw32_tkAssocDestroy.c')
| -rw-r--r-- | pthreads/src/ptw32_tkAssocDestroy.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/pthreads/src/ptw32_tkAssocDestroy.c b/pthreads/src/ptw32_tkAssocDestroy.c new file mode 100644 index 0000000..fedebf5 --- /dev/null +++ b/pthreads/src/ptw32_tkAssocDestroy.c @@ -0,0 +1,114 @@ +/* + * 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 */ |