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Explicit functions for operator&=~ and operator|=
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gcc, and recent clang-10 can construct new objects
using references as arguments.
However clang-8 (and MSVC?) do not:
"error: no matching function for call to 'operator new'"
The compiler apparently does not expand the template
class A <-> `A*` vs. `A const&`
for different cases.
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This is a dumb stack allocator using LIFO allocation/free, with
a fallback to new/delete. This works well for small STL containers
in particular std::vector, but it's also suitable for std::map<>,
in particular copy constructing small POD maps (plugin pin mappings).
Eventually this could be combined with TLSF for a flexible
memory arena management. This is however not currently needed
for any the planned use-cases.
This code is ANSI C++98 compatible, and yet also works with
modern C++11, C++14
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~StatefulDiffCommand() may trigger UndoTransaction::command_death()
which may delete the StatefulDiffCommand() that's just being destroyed.
This depends on the signal-connection order, which is undefined.
In any case when a shared_ptr<> object is being destroyed it means
that all references to it are already gone. There's no need to
emit drop_references from the d'tor.
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This fixes a case when deleting a plugin, deletes all automation
undo/redo events:
<UndoTransaction name="add automation event">
<MementoCommand type-name="ARDOUR::AutomationList">
...
`delete this;` calls the d'tor which emits drop_references(),
that leads to UndoTransaction::command_death() destroying the
object, whichh causes a double free.
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When a playlist is deleted and drops_references(), any
undo/redo StatefulDiffCommand referncing playlist invoke
Destructible::drop_references() of the Command.
This leads to command_death(). As opposed to UndoTransaction::clear()
the StatefulDiffCommand was not destroyed.
In case of playlists StatefulDiffCommand::_changes contains
PBD::SequenceProperty<std::list<boost::shared_ptr<Region> > >
and shared pointer reference of the playlist regions were kept
indefinitely.
This fixes the following scenario:
New session, import an file, delete the created track,
clean up unused sources (delete unused playlists)[, quit].
A reference to the imported region was kept, because of the
playlist's undo command (insert region). Yet the source file
was deleted.
PS. Most playlist changes are accompanied by GUI zoom/selection
MementoCommands. Those are currently never directly dropped.
command_death() leaves those in place.
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This fixes an issue when copy/pasting plugins or aux-sends from
one track to another. After copying the processor, the state
is copied, however the Controllable state did save
the InlineControl flag, so this as lost.
(amend 93180ceea)
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need the Rotary flag set
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PBD::IgnorableControllable() is no longer used.
It also was problematic, because in every case where a
Controllable is required, min/max range and usually also
get/set value are significant.
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Mostly these are to do with TLSF which I hadn't in fact been building!! Hopefully there won't be any problems for the gcc builds.
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context
the value is used by the parser context; the old code called it only after the *first* parser context
was created. therefore the first XMLTree::read() call has its behavior determined by libxml2's default
for this value, rather than by our explicit choice (do not treat whitespace as a note). All subequent
read() calls will use our value.
This variable inside libxml2 is actually per-thread, which just increases the stakes for calling
xmlKeepBlanksDefault() at the right time
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PBD::init()
See comment for details on why
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For the case at hand (plugin scale-points) it's highly unlikely to
encounter numbers > INT_MAX.
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available in the GTK+ version we use for the official build stack
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This is similar to sort(1) --human-numeric-sort,
as opposed to naturally_less() negative numbers, hex-prefixes
and SI metric prefixes are taken into account.
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This allows to indicate that a control should by default be displayed
inline in the mixer-strip.
Previously that was hard-coded for and enabled for send-level
controls only.
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Also address issues with MIDI and also atomicity of _pending_overwrite
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It's long been a guideline (and IIRC a Weff-c++ warning) that either all, or
none, of the copy methods should be defined, but this became a standard warning
in GCC9. Presumably to account for a later language change though I'm not sure
which.
I don't remember why the ChanMapping copy constructor can't just be a simple
copy (it's just a map of POD), but figure it's safer to just copy what that
does.
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Second buffer is not used (or allocated) yet.
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This clause is in NO_VFORK, vfork_exec_wrapper is irrelevant there
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103ef2ba08e5 introduced an API to write raw data (const void*)
to a child process, along with the previous API to
write (std::string const&)
VideoMonitor uses write_to_stdin("fixed text"), and g++
interprets this to use the (const void*) API instead
of the std::string, which breaks communication.
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interruption
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It's a well established convention that pan y-axis automation,
or vertical uses (top) +1 for left.
This special cases rotary knobs (and horizontal sliders) to retain
a clockwise movement (or movement to the right) for panning to the
right.
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