119 lines
3.9 KiB
C
119 lines
3.9 KiB
C
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/*
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* ptw32_tkAssocCreate.c
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*
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* Description:
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* This translation unit implements routines which are private to
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* the implementation and may be used throughout it.
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*
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* --------------------------------------------------------------------------
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*
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* Pthreads-win32 - POSIX Threads Library for Win32
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* Copyright(C) 1998 John E. Bossom
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* Copyright(C) 1999,2005 Pthreads-win32 contributors
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*
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* Contact Email: rpj@callisto.canberra.edu.au
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*
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* The current list of contributors is contained
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* in the file CONTRIBUTORS included with the source
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* code distribution. The list can also be seen at the
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* following World Wide Web location:
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* http://sources.redhat.com/pthreads-win32/contributors.html
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library in the file COPYING.LIB;
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* if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "pthread.h"
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#include "implement.h"
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int
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ptw32_tkAssocCreate (ptw32_thread_t * sp, pthread_key_t key)
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/*
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* -------------------------------------------------------------------
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* This routine creates an association that
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* is unique for the given (thread,key) combination.The association
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* is referenced by both the thread and the key.
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* This association allows us to determine what keys the
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* current thread references and what threads a given key
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* references.
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* See the detailed description
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* at the beginning of this file for further details.
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*
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* Notes:
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* 1) New associations are pushed to the beginning of the
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* chain so that the internal ptw32_selfThreadKey association
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* is always last, thus allowing selfThreadExit to
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* be implicitly called last by pthread_exit.
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* 2)
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*
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* Parameters:
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* thread
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* current running thread.
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* key
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* key on which to create an association.
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* Returns:
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* 0 - if successful,
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* ENOMEM - not enough memory to create assoc or other object
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* EINVAL - an internal error occurred
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* ENOSYS - an internal error occurred
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* -------------------------------------------------------------------
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*/
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{
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ThreadKeyAssoc *assoc;
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/*
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* Have to create an association and add it
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* to both the key and the thread.
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*
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* Both key->keyLock and thread->threadLock are locked before
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* entry to this routine.
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*/
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assoc = (ThreadKeyAssoc *) calloc (1, sizeof (*assoc));
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if (assoc == NULL)
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{
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return ENOMEM;
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}
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assoc->thread = sp;
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assoc->key = key;
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/*
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* Register assoc with key
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*/
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assoc->prevThread = NULL;
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assoc->nextThread = (ThreadKeyAssoc *) key->threads;
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if (assoc->nextThread != NULL)
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{
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assoc->nextThread->prevThread = assoc;
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}
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key->threads = (void *) assoc;
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/*
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* Register assoc with thread
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*/
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assoc->prevKey = NULL;
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assoc->nextKey = (ThreadKeyAssoc *) sp->keys;
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if (assoc->nextKey != NULL)
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{
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assoc->nextKey->prevKey = assoc;
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}
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sp->keys = (void *) assoc;
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return (0);
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} /* ptw32_tkAssocCreate */
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