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Fix deadlocks on MIDI record.

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More locking than is strictly necessary, but the assertion in MidiModel::write_lock is a nice check, at least for now...


git-svn-id: svn://localhost/ardour2/branches/3.0@5868 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
David Robillard 2009-10-22 20:37:24 +00:00
parent 20eb826764
commit 11f448917f
3 changed files with 21 additions and 5 deletions
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1
libs/ardour/ardour/midi_model.h
View File

@ -178,6 +178,7 @@ private:
};
public:
virtual WriteLock edit_lock();
virtual WriteLock write_lock();
private:

23
libs/ardour/midi_model.cc
View File

@ -135,7 +135,7 @@ MidiModel::DeltaCommand::operator()()
// This could be made much faster by using a priority_queue for added and
// removed notes (or sort here), and doing a single iteration over _model
MidiModel::WriteLock lock(_model->write_lock());
MidiModel::WriteLock lock(_model->edit_lock());
for (NoteList::iterator i = _added_notes.begin(); i != _added_notes.end(); ++i) {
_model->add_note_unlocked(*i);
@ -155,7 +155,7 @@ MidiModel::DeltaCommand::undo()
// This could be made much faster by using a priority_queue for added and
// removed notes (or sort here), and doing a single iteration over _model
MidiModel::WriteLock lock(_model->write_lock());;
MidiModel::WriteLock lock(_model->edit_lock());;
for (NoteList::iterator i = _added_notes.begin(); i != _added_notes.end(); ++i) {
_model->remove_note_unlocked(*i);
@ -383,7 +383,7 @@ MidiModel::DiffCommand::change(const boost::shared_ptr< Evoral::Note<TimeType> >
void
MidiModel::DiffCommand::operator()()
{
MidiModel::WriteLock lock(_model->write_lock());
MidiModel::WriteLock lock(_model->edit_lock());
for (ChangeList::iterator i = _changes.begin(); i != _changes.end(); ++i) {
Property prop = i->property;
@ -413,7 +413,7 @@ MidiModel::DiffCommand::operator()()
void
MidiModel::DiffCommand::undo()
{
MidiModel::WriteLock lock(_model->write_lock());
MidiModel::WriteLock lock(_model->edit_lock());
for (ChangeList::iterator i = _changes.begin(); i != _changes.end(); ++i) {
Property prop = i->property;
@ -723,10 +723,23 @@ MidiModel::find_note (boost::shared_ptr<Evoral::Note<TimeType> > other)
return boost::shared_ptr<Evoral::Note<TimeType> >();
}
/** Lock and invalidate the source.
* This should be used by commands and editing things
*/
MidiModel::WriteLock
MidiModel::write_lock()
MidiModel::edit_lock()
{
Glib::Mutex::Lock* source_lock = new Glib::Mutex::Lock(_midi_source->mutex());
_midi_source->invalidate(); // Release cached iterator's read lock on model
return WriteLock(new WriteLockImpl(source_lock, _lock, _control_lock));
}
/** Lock just the model, the source lock must already be held.
* This should only be called from libardour/evoral places
*/
MidiModel::WriteLock
MidiModel::write_lock()
{
assert(!_midi_source->mutex().trylock());
return WriteLock(new WriteLockImpl(NULL, _lock, _control_lock));
}

2
libs/ardour/smf_source.cc
View File

@ -362,6 +362,7 @@ SMFSource::set_state (const XMLNode& node, int version)
void
SMFSource::mark_streaming_midi_write_started (NoteMode mode, sframes_t start_frame)
{
Glib::Mutex::Lock lm (_lock);
MidiSource::mark_streaming_midi_write_started (mode, start_frame);
Evoral::SMF::begin_write ();
_last_ev_time_beats = 0.0;
@ -371,6 +372,7 @@ SMFSource::mark_streaming_midi_write_started (NoteMode mode, sframes_t start_fra
void
SMFSource::mark_streaming_write_completed ()
{
Glib::Mutex::Lock lm (_lock);
MidiSource::mark_streaming_write_completed();
if (!writable()) {