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authortpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-01-05 00:01:18 +0000
committertpearson <tpearson@283d02a7-25f6-0310-bc7c-ecb5cbfe19da>2010-01-05 00:01:18 +0000
commit42995d7bf396933ee60c5f89c354ea89cf13df0d (patch)
treecfdcea0ac57420e7baf570bfe435e107bb842541 /flow/gsl/gsldatacache.h
downloadarts-42995d7bf396933ee60c5f89c354ea89cf13df0d.tar.gz
arts-42995d7bf396933ee60c5f89c354ea89cf13df0d.zip
Copy of aRts for Trinity modifications
git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/dependencies/arts@1070145 283d02a7-25f6-0310-bc7c-ecb5cbfe19da
Diffstat (limited to 'flow/gsl/gsldatacache.h')
-rw-r--r--flow/gsl/gsldatacache.h87
1 files changed, 87 insertions, 0 deletions
diff --git a/flow/gsl/gsldatacache.h b/flow/gsl/gsldatacache.h
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+/* GSL - Generic Sound Layer
+ * Copyright (C) 2001 Tim Janik
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+#ifndef __GSL_DATA_CACHE_H__
+#define __GSL_DATA_CACHE_H__
+
+#include <gsl/gslcommon.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+
+/* --- macros --- */
+#define GSL_DATA_CACHE_NODE_SIZE(dcache) (((GslDataCache*) (dcache))->node_size)
+
+
+/* --- typedefs & structures --- */
+typedef gfloat GslDataType;
+typedef struct _GslDataCacheNode GslDataCacheNode;
+struct _GslDataCache
+{
+ GslDataHandle *dhandle;
+ guint open_count;
+ GslMutex mutex;
+ guint ref_count;
+ guint node_size; /* power of 2, const for all dcaches */
+ guint padding; /* n_values around blocks */
+ guint max_age;
+ gboolean low_persistency;
+ guint n_nodes;
+ GslDataCacheNode **nodes;
+};
+struct _GslDataCacheNode
+{
+ gsize offset;
+ guint ref_count;
+ guint age;
+ GslDataType *data; /* NULL while busy */
+};
+typedef enum
+{
+ GSL_DATA_CACHE_REQUEST = FALSE, /* node->data may be NULL and will be filled */
+ GSL_DATA_CACHE_DEMAND_LOAD = TRUE, /* blocks until node->data != NULL */
+ GSL_DATA_CACHE_PEEK = 2 /* may return NULL node, data != NULL otherwise */
+} GslDataCacheRequest;
+
+
+/* --- prototypes --- */
+GslDataCache* gsl_data_cache_new (GslDataHandle *dhandle,
+ guint padding);
+GslDataCache* gsl_data_cache_ref (GslDataCache *dcache);
+void gsl_data_cache_unref (GslDataCache *dcache);
+void gsl_data_cache_open (GslDataCache *dcache);
+void gsl_data_cache_close (GslDataCache *dcache);
+GslDataCacheNode* gsl_data_cache_ref_node (GslDataCache *dcache,
+ gsize offset,
+ GslDataCacheRequest load_request);
+void gsl_data_cache_unref_node (GslDataCache *dcache,
+ GslDataCacheNode *node);
+void gsl_data_cache_free_olders (GslDataCache *dcache,
+ guint max_age);
+GslDataCache* gsl_data_cache_from_dhandle (GslDataHandle *dhandle,
+ guint min_padding);
+
+
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* __GSL_DATA_CACHE_H__ */