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fix “no per-thread pool” abort

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For some backends the process thread can change (e.g.
switch coreaudio headphone + internal speakers)

If there are existing x-thread event calls this can lead to
the following situation:

1) SessionEvent::operator new
2) audioengine process thread change
3) SessionEvent::operator delete  -> crash, wrong thread

SessionEvent::operator delete can safely push the event back to
the pool for later cleanup..
This commit is contained in:
Robin Gareus 2015-03-11 00:25:10 +01:00
parent 1a5a48436a
commit fe85575a12
3 changed files with 6 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

5
libs/ardour/session_events.cc
View file

@ -86,7 +86,7 @@ SessionEvent::operator new (size_t)
void
SessionEvent::operator delete (void *ptr, size_t /*size*/)
{
Pool* p = pool->per_thread_pool ();
Pool* p = pool->per_thread_pool (false);
SessionEvent* ev = static_cast<SessionEvent*> (ptr);
DEBUG_TRACE (DEBUG::SessionEvents, string_compose (
@ -100,9 +100,10 @@ SessionEvent::operator delete (void *ptr, size_t /*size*/)
}
#endif
if (p == ev->own_pool) {
if (p && p == ev->own_pool) {
p->release (ptr);
} else {
assert(ev->own_pool);
ev->own_pool->push (ev);
DEBUG_TRACE (DEBUG::SessionEvents, string_compose ("%1 was wrong thread for this pool, pushed event onto pending list, will be deleted on next alloc from %2 pool size %3 free %4 used %5 pending %6\n",
pthread_name(), ev->own_pool->name(),

2
libs/pbd/pbd/pool.h
View file

@ -128,7 +128,7 @@ class LIBPBD_API PerThreadPool
const Glib::Threads::Private<CrossThreadPool>& key() const { return _key; }
void create_per_thread_pool (std::string name, unsigned long item_size, unsigned long nitems);
CrossThreadPool* per_thread_pool ();
CrossThreadPool* per_thread_pool (bool must_exist = true);
void set_trash (RingBuffer<CrossThreadPool*>* t);
void add_to_trash (CrossThreadPool *);

4
libs/pbd/pool.cc
View file

@ -179,10 +179,10 @@ PerThreadPool::create_per_thread_pool (string n, unsigned long isize, unsigned l
* calling create_per_thread_pool in the current thread.
*/
CrossThreadPool*
PerThreadPool::per_thread_pool ()
PerThreadPool::per_thread_pool (bool must_exist)
{
CrossThreadPool* p = _key.get();
if (!p) {
if (!p && must_exist) {
fatal << "programming error: no per-thread pool \"" << _name << "\" for thread " << pthread_name() << endmsg;
abort(); /*NOTREACHED*/
}