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+/* -*- 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;
+}