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authorDavid Robillard <d@drobilla.net>2010-01-07 01:34:42 +0000
committerDavid Robillard <d@drobilla.net>2010-01-07 01:34:42 +0000
commit10a5b76a65fb7ca7bf8c1f5869aaf763854e05a3 (patch)
treef93824399e791f218545109304500fe71686f0a3 /src/engine/QueuedEventSource.cpp
parenta6045e5dc58f2dd2ab9e3d3d19fd3eaf6d84216f (diff)
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Merge QueuedEventSource and EventSource.
git-svn-id: http://svn.drobilla.net/lad/trunk/ingen@2352 a436a847-0d15-0410-975c-d299462d15a1
Diffstat (limited to 'src/engine/QueuedEventSource.cpp')
-rw-r--r--src/engine/QueuedEventSource.cpp130
1 files changed, 0 insertions, 130 deletions
diff --git a/src/engine/QueuedEventSource.cpp b/src/engine/QueuedEventSource.cpp
deleted file mode 100644
index 9fcd5711..00000000
--- a/src/engine/QueuedEventSource.cpp
+++ /dev/null
@@ -1,130 +0,0 @@
-/* This file is part of Ingen.
- * Copyright (C) 2008-2009 Dave Robillard <http://drobilla.net>
- *
- * Ingen 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.
- *
- * 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 General Public License for 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.,
- * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <sys/mman.h>
-#include "QueuedEventSource.hpp"
-#include "QueuedEvent.hpp"
-#include "PostProcessor.hpp"
-#include "ThreadManager.hpp"
-#include "ProcessContext.hpp"
-
-using namespace std;
-
-namespace Ingen {
-
-
-QueuedEventSource::QueuedEventSource(size_t queue_size)
- : _blocking_semaphore(0)
-{
- Thread::set_context(THREAD_PRE_PROCESS);
- assert(context() == THREAD_PRE_PROCESS);
- set_name("QueuedEventSource");
-}
-
-
-QueuedEventSource::~QueuedEventSource()
-{
- Thread::stop();
-}
-
-
-/** Push an unprepared event onto the queue.
- */
-void
-QueuedEventSource::push_queued(QueuedEvent* const ev)
-{
- assert(!ev->is_prepared());
- Raul::List<Event*>::Node* node = new Raul::List<Event*>::Node(ev);
- _events.push_back(node);
- if (_prepared_back.get() == NULL)
- _prepared_back = node;
-
- whip();
-}
-
-
-/** Process all events for a cycle.
- *
- * Executed events will be pushed to @a dest.
- */
-void
-QueuedEventSource::process(PostProcessor& dest, ProcessContext& context)
-{
- assert(ThreadManager::current_thread_id() == THREAD_PROCESS);
-
- if (_events.empty())
- return;
-
- /* Limit the maximum number of queued events to process per cycle. This
- * makes the process callback (more) realtime-safe by preventing being
- * choked by events coming in faster than they can be processed.
- * FIXME: test this and figure out a good value */
- const size_t MAX_QUEUED_EVENTS = context.nframes() / 32;
-
- size_t num_events_processed = 0;
-
- QueuedEvent* ev = (QueuedEvent*)_events.front();
- Raul::List<Event*>::Node* new_head = _events.head();
-
- while (ev && ev->is_prepared() && ev->time() < context.end()) {
- ev->execute(context);
- new_head = new_head->next();
- if (++num_events_processed > MAX_QUEUED_EVENTS)
- break;
- ev = (new_head ? (QueuedEvent*)new_head->elem() : NULL);
- }
-
- if (num_events_processed > 0) {
- Raul::List<Event*> front;
- _events.chop_front(front, num_events_processed, new_head);
- dest.append(&front);
- }
-}
-
-
-// Private //
-
-
-/** Pre-process a single event */
-void
-QueuedEventSource::_whipped()
-{
- Raul::List<Event*>::Node* pb = _prepared_back.get();
- if (!pb)
- return;
-
- QueuedEvent* const ev = (QueuedEvent*)pb->elem();
- assert(ev);
- if (!ev)
- return;
-
- assert(!ev->is_prepared());
- ev->pre_process();
- assert(ev->is_prepared());
-
- assert(_prepared_back.get() == pb);
- _prepared_back = pb->next();
-
- // If event was blocking, wait for event to being run through the
- // process thread before preparing the next event
- if (ev->is_blocking())
- _blocking_semaphore.wait();
-}
-
-
-} // namespace Ingen
-