New upstream version 18.0.1+dfsg1
This commit is contained in:
Sebastian Ramacher
parent
6efda2859e
commit
f2cf6cce50
1337 changed files with 41178 additions and 84670 deletions
232
deps/w32-pthreads/ptw32_callUserDestroyRoutines.c
vendored
232
deps/w32-pthreads/ptw32_callUserDestroyRoutines.c
vendored
|
|
@ -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.,
|
||||
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 */
|
||||
Loading…
Add table
Add a link
Reference in a new issue