From 98fe0e7056e6697396249531785d3899f94d79be Mon Sep 17 00:00:00 2001 From: David Robillard Date: Sat, 10 Jun 2006 01:52:02 +0000 Subject: More juggling git-svn-id: http://svn.drobilla.net/lad/grauph@15 a436a847-0d15-0410-975c-d299462d15a1 --- src/engine/QueuedEventSource.h | 83 ------------------------------------------ 1 file changed, 83 deletions(-) delete mode 100644 src/engine/QueuedEventSource.h (limited to 'src/engine/QueuedEventSource.h') diff --git a/src/engine/QueuedEventSource.h b/src/engine/QueuedEventSource.h deleted file mode 100644 index 002fc642..00000000 --- a/src/engine/QueuedEventSource.h +++ /dev/null @@ -1,83 +0,0 @@ -/* This file is part of Om. Copyright (C) 2006 Dave Robillard. - * - * Om 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. - * - * Om 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., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA - */ - -#ifndef QUEUEDEVENTSOURCE_H -#define QUEUEDEVENTSOURCE_H - -#include -#include -#include "util/types.h" -#include "util/Semaphore.h" -#include "EventSource.h" - -namespace Om { - -class Event; -class QueuedEvent; - - -/** Queue of events that need processing before reaching the audio thread. - * - * Implemented as a deque (ringbuffer) in a circular array. Pushing and - * popping are threadsafe, as long as a single thread pushes and a single - * thread pops (ie this data structure is threadsafe, but the push and pop - * methods themselves are not). - */ -class QueuedEventSource : public EventSource -{ -public: - QueuedEventSource(size_t size); - ~QueuedEventSource(); - - Event* pop_earliest_event_before(const samplecount time); - - void unblock(); - - void start(); - void stop(); - -protected: - void push(QueuedEvent* const ev); - -private: - // Prevent copies (undefined) - QueuedEventSource(const QueuedEventSource&); - QueuedEventSource& operator=(const QueuedEventSource&); - - // Note that it's crucially important which functions access which of these - // variables, to maintain threadsafeness. - - size_t m_front; ///< Front of queue - size_t m_back; ///< Back of entire queue (1 past index of back element) - size_t m_prepared_back; ///< Back of prepared section (1 past index of back prepared element) - const size_t m_size; - QueuedEvent** m_events; - - bool m_thread_exists; - bool m_prepare_thread_exit_flag; - pthread_t m_prepare_thread; - Semaphore m_semaphore; ///< Counting semaphor for driving prepare thread - pthread_mutex_t m_blocking_mutex; - pthread_cond_t m_blocking_cond; - - static void* prepare_loop(void* q) { return ((QueuedEventSource*)q)->m_prepare_loop(); } - void* m_prepare_loop(); -}; - - -} // namespace Om - -#endif // QUEUEDEVENTSOURCE_H -- cgit v1.2.1