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Diffstat (limited to 'pthreads/ptw32_tkAssocCreate.c')
| -rw-r--r-- | pthreads/ptw32_tkAssocCreate.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/pthreads/ptw32_tkAssocCreate.c b/pthreads/ptw32_tkAssocCreate.c new file mode 100644 index 000000000..5ba24bbf7 --- /dev/null +++ b/pthreads/ptw32_tkAssocCreate.c @@ -0,0 +1,118 @@ +/* + * ptw32_tkAssocCreate.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" + + +int +ptw32_tkAssocCreate (ptw32_thread_t * sp, pthread_key_t key) + /* + * ------------------------------------------------------------------- + * This routine creates an association that + * is unique for the given (thread,key) combination.The association + * is referenced by both the thread and the key. + * This association allows us to determine what keys the + * current thread references and what threads a given key + * references. + * See the detailed description + * at the beginning of this file for further details. + * + * Notes: + * 1) New associations are pushed to the beginning of the + * chain so that the internal ptw32_selfThreadKey association + * is always last, thus allowing selfThreadExit to + * be implicitly called last by pthread_exit. + * 2) + * + * Parameters: + * thread + * current running thread. + * key + * key on which to create an association. + * Returns: + * 0 - if successful, + * ENOMEM - not enough memory to create assoc or other object + * EINVAL - an internal error occurred + * ENOSYS - an internal error occurred + * ------------------------------------------------------------------- + */ +{ + ThreadKeyAssoc *assoc; + + /* + * Have to create an association and add it + * to both the key and the thread. + * + * Both key->keyLock and thread->threadLock are locked on + * entry to this routine. + */ + assoc = (ThreadKeyAssoc *) calloc (1, sizeof (*assoc)); + + if (assoc == NULL) + { + return ENOMEM; + } + + assoc->thread = sp; + assoc->key = key; + + /* + * Register assoc with key + */ + assoc->prevThread = NULL; + assoc->nextThread = (ThreadKeyAssoc *) key->threads; + if (assoc->nextThread != NULL) + { + assoc->nextThread->prevThread = assoc; + } + key->threads = (void *) assoc; + + /* + * Register assoc with thread + */ + assoc->prevKey = NULL; + assoc->nextKey = (ThreadKeyAssoc *) sp->keys; + if (assoc->nextKey != NULL) + { + assoc->nextKey->prevKey = assoc; + } + sp->keys = (void *) assoc; + + return (0); + +} /* ptw32_tkAssocCreate */ |