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Diffstat (limited to 'pthreads/src/ptw32_callUserDestroyRoutines.c')
| -rw-r--r-- | pthreads/src/ptw32_callUserDestroyRoutines.c | 232 |
1 files changed, 0 insertions, 232 deletions
diff --git a/pthreads/src/ptw32_callUserDestroyRoutines.c b/pthreads/src/ptw32_callUserDestroyRoutines.c deleted file mode 100644 index f290f7b..0000000 --- a/pthreads/src/ptw32_callUserDestroyRoutines.c +++ /dev/null @@ -1,232 +0,0 @@ -/* - * ptw32_callUserDestroyRoutines.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" - -#if defined(__CLEANUP_CXX) -# if defined(_MSC_VER) -# include <eh.h> -# elif defined(__WATCOMC__) -# include <eh.h> -# include <exceptio.h> -# else -# if defined(__GNUC__) && __GNUC__ < 3 -# include <new.h> -# else -# include <new> - using - std::terminate; -# endif -# endif -#endif - -void -ptw32_callUserDestroyRoutines (pthread_t thread) - /* - * ------------------------------------------------------------------- - * DOCPRIVATE - * - * This the routine runs through all thread keys and calls - * the destroy routines on the user's data for the current thread. - * It simulates the behaviour of POSIX Threads. - * - * PARAMETERS - * thread - * an instance of pthread_t - * - * RETURNS - * N/A - * ------------------------------------------------------------------- - */ -{ - ThreadKeyAssoc * assoc; - - if (thread.p != NULL) - { - ptw32_mcs_local_node_t threadLock; - ptw32_mcs_local_node_t keyLock; - int assocsRemaining; - int iterations = 0; - ptw32_thread_t * sp = (ptw32_thread_t *) thread.p; - - /* - * Run through all Thread<-->Key associations - * for the current thread. - * - * Do this process at most PTHREAD_DESTRUCTOR_ITERATIONS times. - */ - do - { - assocsRemaining = 0; - iterations++; - - ptw32_mcs_lock_acquire(&(sp->threadLock), &threadLock); - /* - * The pointer to the next assoc is stored in the thread struct so that - * the assoc destructor in pthread_key_delete can adjust it - * if it deletes this assoc. This can happen if we fail to acquire - * both locks below, and are forced to release all of our locks, - * leaving open the opportunity for pthread_key_delete to get in - * before us. - */ - sp->nextAssoc = sp->keys; - ptw32_mcs_lock_release(&threadLock); - - for (;;) - { - void * value; - pthread_key_t k; - void (*destructor) (void *); - - /* - * First we need to serialise with pthread_key_delete by locking - * both assoc guards, but in the reverse order to our convention, - * so we must be careful to avoid deadlock. - */ - ptw32_mcs_lock_acquire(&(sp->threadLock), &threadLock); - - if ((assoc = (ThreadKeyAssoc *)sp->nextAssoc) == NULL) - { - /* Finished */ - ptw32_mcs_lock_release(&threadLock); - break; - } - else - { - /* - * assoc->key must be valid because assoc can't change or be - * removed from our chain while we hold at least one lock. If - * the assoc was on our key chain then the key has not been - * deleted yet. - * - * Now try to acquire the second lock without deadlocking. - * If we fail, we need to relinquish the first lock and the - * processor and then try to acquire them all again. - */ - if (ptw32_mcs_lock_try_acquire(&(assoc->key->keyLock), &keyLock) == EBUSY) - { - ptw32_mcs_lock_release(&threadLock); - Sleep(0); - /* - * Go around again. - * If pthread_key_delete has removed this assoc in the meantime, - * sp->nextAssoc will point to a new assoc. - */ - continue; - } - } - - /* We now hold both locks */ - - sp->nextAssoc = assoc->nextKey; - - /* - * Key still active; pthread_key_delete - * will block on these same mutexes before - * it can release actual key; therefore, - * key is valid and we can call the destroy - * routine; - */ - k = assoc->key; - destructor = k->destructor; - value = TlsGetValue(k->key); - TlsSetValue (k->key, NULL); - - // Every assoc->key exists and has a destructor - if (value != NULL && iterations <= PTHREAD_DESTRUCTOR_ITERATIONS) - { - /* - * Unlock both locks before the destructor runs. - * POSIX says pthread_key_delete can be run from destructors, - * and that probably includes with this key as target. - * pthread_setspecific can also be run from destructors and - * also needs to be able to access the assocs. - */ - ptw32_mcs_lock_release(&threadLock); - ptw32_mcs_lock_release(&keyLock); - - assocsRemaining++; - -#if defined(__cplusplus) - - try - { - /* - * Run the caller's cleanup routine. - */ - destructor (value); - } - catch (...) - { - /* - * A system unexpected exception has occurred - * running the user's destructor. - * We get control back within this block in case - * the application has set up it's own terminate - * handler. Since we are leaving the thread we - * should not get any internal pthreads - * exceptions. - */ - terminate (); - } - -#else /* __cplusplus */ - - /* - * Run the caller's cleanup routine. - */ - destructor (value); - -#endif /* __cplusplus */ - - } - else - { - /* - * Remove association from both the key and thread chains - * and reclaim it's memory resources. - */ - ptw32_tkAssocDestroy (assoc); - ptw32_mcs_lock_release(&threadLock); - ptw32_mcs_lock_release(&keyLock); - } - } - } - while (assocsRemaining); - } -} /* ptw32_callUserDestroyRoutines */ |