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author | David Robillard <d@drobilla.net> | 2012-05-09 01:14:30 +0000 |
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committer | David Robillard <d@drobilla.net> | 2012-05-09 01:14:30 +0000 |
commit | baeb3c1872a989b69eb89fae04f93c59b06f258e (patch) | |
tree | 83720f9c7bad7ab26c910180d8caea2fd4cb7e70 /src/server/PreProcessor.hpp | |
parent | 4d46a232b30be99bc34e581cbc636345f77c6bc4 (diff) | |
download | ingen-baeb3c1872a989b69eb89fae04f93c59b06f258e.tar.gz ingen-baeb3c1872a989b69eb89fae04f93c59b06f258e.tar.bz2 ingen-baeb3c1872a989b69eb89fae04f93c59b06f258e.zip |
Simply event interface design and make only one pre-process thread.
This makes event pre-processing actually safe for multiple interfaces since multiple events will never be pre-processed simultaneously and the pre-process order is definitely the same as the execute order.
git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@4323 a436a847-0d15-0410-975c-d299462d15a1
Diffstat (limited to 'src/server/PreProcessor.hpp')
-rw-r--r-- | src/server/PreProcessor.hpp | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/src/server/PreProcessor.hpp b/src/server/PreProcessor.hpp new file mode 100644 index 00000000..4fd1c91e --- /dev/null +++ b/src/server/PreProcessor.hpp @@ -0,0 +1,67 @@ +/* + This file is part of Ingen. + Copyright 2007-2012 David Robillard <http://drobilla.net/> + + Ingen is free software: you can redistribute it and/or modify it under the + terms of the GNU Affero General Public License as published by the Free + Software Foundation, either version 3 of the License, or any later version. + + Ingen 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 Affero General Public License for details. + + You should have received a copy of the GNU Affero General Public License + along with Ingen. If not, see <http://www.gnu.org/licenses/>. +*/ + +#ifndef INGEN_ENGINE_PREPROCESSOR_HPP +#define INGEN_ENGINE_PREPROCESSOR_HPP + +#include <glibmm/thread.h> + +#include "raul/Slave.hpp" + +namespace Ingen { +namespace Server { + +class Event; +class PostProcessor; +class ProcessContext; + +class PreProcessor : public Raul::Slave +{ +public: + explicit PreProcessor(); + + ~PreProcessor(); + + /** Return true iff no events are enqueued. */ + inline bool empty() const { return !_head.get(); } + + /** Enqueue an event. + * This is safe to call from any non-realtime thread (it locks). + */ + void event(Event* ev); + + /** Process events for a cycle. + * @return False iff this source is finished and should be removed. + */ + bool process(PostProcessor& dest, + ProcessContext& context, + bool limit = true); + +protected: + virtual void _whipped(); ///< Prepare 1 event + +private: + Glib::Mutex _mutex; + Raul::AtomicPtr<Event> _head; + Raul::AtomicPtr<Event> _prepared_back; + Raul::AtomicPtr<Event> _tail; +}; + +} // namespace Server +} // namespace Ingen + +#endif // INGEN_ENGINE_PREPROCESSOR_HPP + |