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Diffstat (limited to 'src/engine/EventSource.cpp')
-rw-r--r-- | src/engine/EventSource.cpp | 127 |
1 files changed, 0 insertions, 127 deletions
diff --git a/src/engine/EventSource.cpp b/src/engine/EventSource.cpp deleted file mode 100644 index 33ab94ab..00000000 --- a/src/engine/EventSource.cpp +++ /dev/null @@ -1,127 +0,0 @@ -/* This file is part of Ingen. - * Copyright 2008-2011 David 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 "EventSource.hpp" -#include "QueuedEvent.hpp" -#include "PostProcessor.hpp" -#include "ThreadManager.hpp" -#include "ProcessContext.hpp" - -using namespace std; - -namespace Ingen { -namespace Engine { - -EventSource::EventSource(size_t queue_size) - : _blocking_semaphore(0) -{ - Thread::set_context(THREAD_PRE_PROCESS); - set_name("EventSource"); -} - -EventSource::~EventSource() -{ - Thread::stop(); -} - -/** Push an unprepared event onto the queue. - */ -void -EventSource::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 -EventSource::process(PostProcessor& dest, ProcessContext& context, bool limit) -{ - ThreadManager::assert_thread(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; - - Raul::List<Event*>::Node* head = _events.head(); - Raul::List<Event*>::Node* tail = head; - - if (!head) - return; - - QueuedEvent* ev = (QueuedEvent*)head->elem(); - - while (ev && ev->is_prepared() && ev->time() < context.end()) { - ev->execute(context); - tail = head; - head = head->next(); - ++num_events_processed; - if (limit && num_events_processed > MAX_QUEUED_EVENTS) - break; - ev = (head ? (QueuedEvent*)head->elem() : NULL); - } - - if (num_events_processed > 0) { - Raul::List<Event*> front; - _events.chop_front(front, num_events_processed, tail); - dest.append(&front); - } -} - -/** Pre-process a single event */ -void -EventSource::_whipped() -{ - Raul::List<Event*>::Node* pb = _prepared_back.get(); - if (!pb) - return; - - QueuedEvent* const ev = (QueuedEvent*)pb->elem(); - assert(ev); - - 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 Engine -} // namespace Ingen - |