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Fix deadlock and potential race condition when editing MIDI.

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git-svn-id: svn://localhost/ardour2/branches/3.0@4614 d708f5d6-7413-0410-9779-e7cbd77b26cf
This commit is contained in:
David Robillard 2009-02-17 06:09:37 +00:00
parent 3f24977735
commit f219a53744
6 changed files with 68 additions and 56 deletions
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5
libs/ardour/ardour/midi_source.h
View file

@ -85,6 +85,11 @@ class MidiSource : virtual public Source
virtual void load_model(bool lock=true, bool force_reload=false) = 0;
virtual void destroy_model() = 0;
/** This must be called with the source lock held whenever the
* source/model contents have been changed (reset iterators/cache/etc).
*/
void invalidate();
void set_note_mode(NoteMode mode);
void set_timeline_position (int64_t pos);

5
libs/ardour/ardour/source.h
View file

@ -115,8 +115,9 @@ class Source : public SessionObject, public ARDOUR::Readable, public boost::nonc
virtual const Evoral::TimeConverter<double, nframes_t>& time_converter() const {
return Evoral::IdentityConverter<double, nframes_t>();
}
Flag flags() const { return _flags; }
Glib::Mutex& mutex() { return _lock; }
Flag flags() const { return _flags; }
protected:
DataType _type;

72
libs/ardour/midi_model.cc
View file

@ -1,22 +1,22 @@
/*
Copyright (C) 2007 Paul Davis
Written by Dave Robillard, 2007
Copyright (C) 2007 Paul Davis
Author: Dave Robillard
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
*/
#define __STDC_LIMIT_MACROS 1
@ -37,11 +37,10 @@ using namespace std;
using namespace ARDOUR;
using namespace PBD;
MidiModel::MidiModel(MidiSource *s, size_t size)
MidiModel::MidiModel(MidiSource* s, size_t size)
: AutomatableSequence<TimeType>(s->session(), size)
, _midi_source(s)
{
//cerr << "MidiModel \"" << s->name() << "\" constructed: " << this << endl;
}
/** Start a new command.
@ -50,7 +49,8 @@ MidiModel::MidiModel(MidiSource *s, size_t size)
* can be held on to for as long as the caller wishes, or discarded without
* formality, until apply_command is called and ownership is taken.
*/
MidiModel::DeltaCommand* MidiModel::new_delta_command(const string name)
MidiModel::DeltaCommand*
MidiModel::new_delta_command(const string name)
{
DeltaCommand* cmd = new DeltaCommand(_midi_source->model(), name);
return cmd;
@ -73,16 +73,14 @@ MidiModel::apply_command(Session& session, Command* cmd)
// DeltaCommand
MidiModel::DeltaCommand::DeltaCommand(boost::shared_ptr<MidiModel> m,
const std::string& name)
MidiModel::DeltaCommand::DeltaCommand(boost::shared_ptr<MidiModel> m, const std::string& name)
: Command(name)
, _model(m)
, _name(name)
{
}
MidiModel::DeltaCommand::DeltaCommand(boost::shared_ptr<MidiModel> m,
const XMLNode& node)
MidiModel::DeltaCommand::DeltaCommand(boost::shared_ptr<MidiModel> m, const XMLNode& node)
: _model(m)
{
set_state(node);
@ -91,7 +89,6 @@ MidiModel::DeltaCommand::DeltaCommand(boost::shared_ptr<MidiModel> m,
void
MidiModel::DeltaCommand::add(const boost::shared_ptr< Evoral::Note<TimeType> > note)
{
//cerr << "MEC: apply" << endl;
_removed_notes.remove(note);
_added_notes.push_back(note);
}
@ -99,7 +96,6 @@ MidiModel::DeltaCommand::add(const boost::shared_ptr< Evoral::Note<TimeType> > n
void
MidiModel::DeltaCommand::remove(const boost::shared_ptr< Evoral::Note<TimeType> > note)
{
//cerr << "MEC: remove" << endl;
_added_notes.remove(note);
_removed_notes.push_back(note);
}
@ -110,12 +106,10 @@ 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
Glib::Mutex::Lock lm (_model->_midi_source->mutex());
_model->_midi_source->invalidate(); // release model read lock
_model->write_lock();
// Store the current seek position so we can restore the read iterator
// after modifying the contents of the model
const TimeType read_time = _model->read_time();
for (NoteList::iterator i = _added_notes.begin(); i != _added_notes.end(); ++i)
_model->add_note_unlocked(*i);
@ -123,9 +117,6 @@ MidiModel::DeltaCommand::operator()()
_model->remove_note_unlocked(*i);
_model->write_unlock();
// FIXME: race?
_model->read_seek(read_time); // restore read position
_model->ContentsChanged(); /* EMIT SIGNAL */
}
@ -135,12 +126,10 @@ 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
Glib::Mutex::Lock lm (_model->_midi_source->mutex());
_model->_midi_source->invalidate(); // release model read lock
_model->write_lock();
// Store the current seek position so we can restore the read iterator
// after modifying the contents of the model
const TimeType read_time = _model->read_time();
for (NoteList::iterator i = _added_notes.begin(); i != _added_notes.end(); ++i)
_model->remove_note_unlocked(*i);
@ -148,16 +137,13 @@ MidiModel::DeltaCommand::undo()
_model->add_note_unlocked(*i);
_model->write_unlock();
// FIXME: race?
_model->read_seek(read_time); // restore read position
_model->ContentsChanged(); /* EMIT SIGNAL */
}
XMLNode&
MidiModel::DeltaCommand::marshal_note(const boost::shared_ptr< Evoral::Note<TimeType> > note)
{
XMLNode *xml_note = new XMLNode("note");
XMLNode* xml_note = new XMLNode("note");
ostringstream note_str(ios::ate);
note_str << int(note->note());
xml_note->add_property("note", note_str.str());
@ -248,13 +234,13 @@ MidiModel::DeltaCommand::set_state(const XMLNode& delta_command)
}
_added_notes.clear();
XMLNode *added_notes = delta_command.child(ADDED_NOTES_ELEMENT);
XMLNode* added_notes = delta_command.child(ADDED_NOTES_ELEMENT);
XMLNodeList notes = added_notes->children();
transform(notes.begin(), notes.end(), back_inserter(_added_notes),
sigc::mem_fun(*this, &DeltaCommand::unmarshal_note));
_removed_notes.clear();
XMLNode *removed_notes = delta_command.child(REMOVED_NOTES_ELEMENT);
XMLNode* removed_notes = delta_command.child(REMOVED_NOTES_ELEMENT);
notes = removed_notes->children();
transform(notes.begin(), notes.end(), back_inserter(_removed_notes),
sigc::mem_fun(*this, &DeltaCommand::unmarshal_note));
@ -265,15 +251,15 @@ MidiModel::DeltaCommand::set_state(const XMLNode& delta_command)
XMLNode&
MidiModel::DeltaCommand::get_state()
{
XMLNode *delta_command = new XMLNode(DELTA_COMMAND_ELEMENT);
XMLNode* delta_command = new XMLNode(DELTA_COMMAND_ELEMENT);
delta_command->add_property("midi-source", _model->midi_source()->id().to_s());
XMLNode *added_notes = delta_command->add_child(ADDED_NOTES_ELEMENT);
XMLNode* added_notes = delta_command->add_child(ADDED_NOTES_ELEMENT);
for_each(_added_notes.begin(), _added_notes.end(), sigc::compose(
sigc::mem_fun(*added_notes, &XMLNode::add_child_nocopy),
sigc::mem_fun(*this, &DeltaCommand::marshal_note)));
XMLNode *removed_notes = delta_command->add_child(REMOVED_NOTES_ELEMENT);
XMLNode* removed_notes = delta_command->add_child(REMOVED_NOTES_ELEMENT);
for_each(_removed_notes.begin(), _removed_notes.end(), sigc::compose(
sigc::mem_fun(*removed_notes, &XMLNode::add_child_nocopy),
sigc::mem_fun(*this, &DeltaCommand::marshal_note)));

8
libs/ardour/midi_source.cc
View file

@ -103,6 +103,12 @@ MidiSource::set_state (const XMLNode& node)
return 0;
}
void
MidiSource::invalidate ()
{
_model_iter.invalidate();
}
nframes_t
MidiSource::midi_read (MidiRingBuffer<nframes_t>& dst, nframes_t start, nframes_t cnt,
nframes_t stamp_offset, nframes_t negative_stamp_offset) const
@ -114,7 +120,7 @@ MidiSource::midi_read (MidiRingBuffer<nframes_t>& dst, nframes_t start, nframes_
Evoral::Sequence<double>::const_iterator& i = _model_iter;
if (_last_read_end == 0 || start != _last_read_end) {
if (_last_read_end == 0 || start != _last_read_end || !i.valid()) {
cerr << "MidiSource::midi_read seeking to frame " << start << endl;
for (i = _model->begin(); i != _model->end(); ++i) {
if (BEATS_TO_FRAMES(i->time()) >= start) {

10
libs/evoral/evoral/Sequence.hpp
View file

@ -63,8 +63,6 @@ class Sequence : virtual public ControlSet {
public:
Sequence(const TypeMap& type_map, size_t size=0);
bool read_locked() { return _read_iter.locked(); }
void write_lock();
void write_unlock();
@ -126,6 +124,8 @@ public:
inline bool valid() const { return !_is_end && _event; }
inline bool locked() const { return _locked; }
void invalidate();
const Event<Time>& operator*() const { return *_event; }
const boost::shared_ptr< Event<Time> > operator->() const { return _event; }
@ -159,9 +159,6 @@ public:
const_iterator begin(Time t=0) const { return const_iterator(*this, t); }
const const_iterator& end() const { return _end_iter; }
void read_seek(Time t) { _read_iter = begin(t); }
Time read_time() const { return _read_iter.valid() ? _read_iter->time() : 0.0; }
bool control_to_midi_event(boost::shared_ptr< Event<Time> >& ev,
const ControlIterator& iter) const;
@ -175,8 +172,7 @@ public:
uint8_t highest_note() const { return _highest_note; }
protected:
mutable const_iterator _read_iter;
bool _edited;
bool _edited;
private:
friend class const_iterator;

24
libs/evoral/src/Sequence.cpp
View file

@ -224,6 +224,26 @@ Sequence<Time>::const_iterator::~const_iterator()
}
}
template<typename Time>
void
Sequence<Time>::const_iterator::invalidate()
{
while (!_active_notes.empty()) {
_active_notes.pop();
}
_type = NIL;
_is_end = true;
if (_seq) {
_note_iter = _seq->notes().end();
_sysex_iter = _seq->sysexes().end();
}
_control_iter = _control_iters.end();
if (_locked) {
_seq->read_unlock();
_locked = false;
}
}
template<typename Time>
const typename Sequence<Time>::const_iterator&
Sequence<Time>::const_iterator::operator++()
@ -407,8 +427,7 @@ Sequence<Time>::const_iterator::operator=(const const_iterator& other)
template<typename Time>
Sequence<Time>::Sequence(const TypeMap& type_map, size_t size)
: _read_iter(*this, DBL_MAX)
, _edited(false)
: _edited(false)
, _type_map(type_map)
, _notes(size)
, _writing(false)
@ -508,7 +527,6 @@ Sequence<Time>::clear()
_notes.clear();
for (Controls::iterator li = _controls.begin(); li != _controls.end(); ++li)
li->second->list()->clear();
_read_iter = end();
_lock.writer_unlock();
}