From 7788892bfb8aaceaa67fccad1ea4aff325a5ac32 Mon Sep 17 00:00:00 2001
From: Bent Bisballe Nyeng <deva@aasimon.org>
Date: Tue, 19 Jan 2016 08:32:44 +0100
Subject: Split CacheManager into several AudioCache classes and refactored the
 lot of them. Unit tests added.

---
 src/audiocacheidmanager.cc | 128 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 src/audiocacheidmanager.cc

(limited to 'src/audiocacheidmanager.cc')

diff --git a/src/audiocacheidmanager.cc b/src/audiocacheidmanager.cc
new file mode 100644
index 0000000..5d4248b
--- /dev/null
+++ b/src/audiocacheidmanager.cc
@@ -0,0 +1,128 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ *            audiocacheidmanager.cc
+ *
+ *  Tue Jan  5 10:59:37 CET 2016
+ *  Copyright 2016 Bent Bisballe Nyeng
+ *  deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ *  This file is part of DrumGizmo.
+ *
+ *  DrumGizmo 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.
+ *
+ *  DrumGizmo 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 more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with DrumGizmo; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA.
+ */
+#include "audiocacheidmanager.h"
+
+#include <limits>
+#include <assert.h>
+
+AudioCacheIDManager::AudioCacheIDManager()
+{
+}
+
+AudioCacheIDManager::~AudioCacheIDManager()
+{
+	assert(availableids.size() == id2cache.size()); // All ids should be released.
+}
+
+void AudioCacheIDManager::init(unsigned int capacity)
+{
+	std::lock_guard<std::mutex> guard(mutex);
+
+	id2cache.resize(capacity);
+	availableids.resize(capacity);
+	for(size_t i = 0; i < capacity; ++i)
+	{
+		availableids[i] = i;
+	}
+}
+
+cache_t& AudioCacheIDManager::getCache(cacheid_t id)
+{
+	std::lock_guard<std::mutex> guard(mutex);
+
+	assert(id != CACHE_NOID);
+	assert(id != CACHE_DUMMYID);
+	assert(id >= 0);
+	assert(id < id2cache.size());
+	assert(id2cache[id].id == id);
+
+	return id2cache[id];
+}
+
+cacheid_t AudioCacheIDManager::registerID(const cache_t& cache)
+{
+	std::lock_guard<std::mutex> guard(mutex);
+
+	cacheid_t id = CACHE_NOID;
+
+	if(availableids.empty())
+	{
+		return CACHE_DUMMYID;
+	}
+	else
+	{
+		id = availableids.back();
+		availableids.pop_back();
+	}
+
+	assert(id2cache[id].id == CACHE_NOID); // Make sure it is not already in use
+
+	id2cache[id] = cache;
+	id2cache[id].id = id;
+
+	return id;
+}
+
+void AudioCacheIDManager::releaseID(cacheid_t id)
+{
+	std::lock_guard<std::mutex> guard(mutex);
+
+	assert(id2cache[id].id != CACHE_NOID); // Test if it wasn't already released.
+
+	id2cache[id].id = CACHE_NOID;
+
+	availableids.push_back(id);
+}
+
+void AudioCacheIDManager::disableActive()
+{
+	// Run through all active cache_ts and disable them.
+	for(auto& cache : id2cache)
+	{
+		if(cache.id != CACHE_NOID)
+		{
+			// Force use of nodata in all of the rest of the next() calls:
+			cache.localpos = std::numeric_limits<size_t>::max();
+			cache.ready = false;
+		}
+	}
+}
+
+std::vector<cacheid_t> AudioCacheIDManager::getActiveIDs()
+{
+	std::vector<cacheid_t> activeIDs;
+
+	for(auto& cache : id2cache)
+	{
+		if(cache.id != CACHE_NOID)
+		{
+			activeIDs.push_back(cache.id);
+		}
+	}
+
+	return activeIDs;
+}
-- 
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