1 files changed, 87 insertions, 0 deletions
diff --git a/flow/gsl/gsldatacache.h b/flow/gsl/gsldatacache.h
new file mode 100644
index 0000000..5eb3677
--- /dev/null
+++ b/flow/gsl/gsldatacache.h
@@ -0,0 +1,87 @@
+/* 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__ */