/*
- * Copyright (C) 2007-2008 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2007-2009 Andre Noll <maan@tuebingen.mpg.de>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
int row_is_invalid(struct osl_table *t, uint32_t row_num);
int get_mapped_object(const struct osl_table *t, unsigned col_num,
uint32_t row_num, struct osl_object *obj);
-int para_truncate(const char *filename, off_t size);
int unmap_table(struct osl_table *t, enum osl_close_flags flags);
int init_rbtrees(struct osl_table *t);
*/
enum index_header_offsets {
/** Bytes 0-8: PARASLASH. */
- IDX_PARA_MAGIC = 0,
+ IDX_OSL_MAGIC = 0,
/** Byte 9: Dirty flag (nonzero if table is mapped). */
IDX_DIRTY_FLAG = 9,
/** Byte 10: osl table version number. */
};
/** Magic string contained in the header of the index file of each osl table. */
-#define PARA_MAGIC "PARASLASH"
+#define OSL_MAGIC "PARASLASH"
/**
* The minimal number of bytes for a column in the index header.
return MIN_IDX_COLUMN_DESCRIPTION_SIZE + strlen(name) - 1;
}
+/*
+ * The version used by this instance of the library. Written to the index of
+ * newly created tables.
+ */
#define CURRENT_TABLE_VERSION 1
+
+/*
+ * The lowest library version that is able to use tables of version
+ * CURRENT_TABLE_VERSION. Also written to the index of new tables. If
+ * compat_version(table) > current_version(lib) the table can not be opened.
+ */
+#define COMPAT_TABLE_VERSION 0
+
+/*
+ * The lowest table version this library understands. On open, if
+ * current_version(table) < min_version(lib) the osl_open_table() call
+ * fails.
+ */
#define MIN_TABLE_VERSION 1
-#define MAX_TABLE_VERSION 1
+
+
/** An index header must be at least that many bytes long. */
#define MIN_INDEX_HEADER_SIZE(num_cols) (MIN_IDX_COLUMN_DESCRIPTION_SIZE \
* num_cols + IDX_COLUMN_DESCRIPTIONS)
_static_inline_ void update_cell_index(char *row_index, struct osl_column *col,
uint32_t map_size, uint32_t object_size)
{
- write_u32(row_index + col->index_offset, map_size - object_size - 1);
- write_u32(row_index + col->index_offset + 4, object_size + 1);
+ write_u32(row_index + col->index_offset, map_size - object_size);
+ write_u32(row_index + col->index_offset + 4, object_size);
}
/**