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Diffstat (limited to 'pthreads/pthread_setspecific.c')
| -rw-r--r-- | pthreads/pthread_setspecific.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/pthreads/pthread_setspecific.c b/pthreads/pthread_setspecific.c new file mode 100644 index 000000000..f06b69616 --- /dev/null +++ b/pthreads/pthread_setspecific.c @@ -0,0 +1,168 @@ +/* + * 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) 1999,2005 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 +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.p == NULL) + { + return ENOENT; + } + } + else + { + /* + * Resolve catch-22 of registering thread with selfThread + * key + */ + ptw32_thread_t * sp = (ptw32_thread_t *) pthread_getspecific (ptw32_selfThreadKey); + + if (sp == NULL) + { + if (value == NULL) + { + return ENOENT; + } + self = *((pthread_t *) value); + } + else + { + self = sp->ptHandle; + } + } + + result = 0; + + if (key != NULL) + { + if (self.p != 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. + */ + ThreadKeyAssoc *assoc; + + if (pthread_mutex_lock(&(key->keyLock)) == 0) + { + ptw32_thread_t * sp = (ptw32_thread_t *) self.p; + + (void) pthread_mutex_lock(&(sp->threadLock)); + + assoc = (ThreadKeyAssoc *) sp->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 (sp, key); + } + + (void) pthread_mutex_unlock(&(sp->threadLock)); + } + (void) pthread_mutex_unlock(&(key->keyLock)); + } + + if (result == 0) + { + if (!TlsSetValue (key->key, (LPVOID) value)) + { + result = EAGAIN; + } + } + } + + return (result); +} /* pthread_setspecific */ |