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pg_include/tsearch/ts_cache.h

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+/*-------------------------------------------------------------------------
+ *
+ * ts_cache.h
+ *	  Tsearch related object caches.
+ *
+ * Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
+ * Portions Copyright (c) 1994, Regents of the University of California
+ *
+ * src/include/tsearch/ts_cache.h
+ *
+ *-------------------------------------------------------------------------
+ */
+#ifndef TS_CACHE_H
+#define TS_CACHE_H
+
+#include "utils/guc.h"
+
+
+/*
+ * All TS*CacheEntry structs must share this common header
+ * (see InvalidateTSCacheCallBack)
+ */
+typedef struct TSAnyCacheEntry
+{
+	Oid			objId;
+	bool		isvalid;
+} TSAnyCacheEntry;
+
+
+typedef struct TSParserCacheEntry
+{
+	/* prsId is the hash lookup key and MUST BE FIRST */
+	Oid			prsId;			/* OID of the parser */
+	bool		isvalid;
+
+	Oid			startOid;
+	Oid			tokenOid;
+	Oid			endOid;
+	Oid			headlineOid;
+	Oid			lextypeOid;
+
+	/*
+	 * Pre-set-up fmgr call of most needed parser's methods
+	 */
+	FmgrInfo	prsstart;
+	FmgrInfo	prstoken;
+	FmgrInfo	prsend;
+	FmgrInfo	prsheadline;
+} TSParserCacheEntry;
+
+typedef struct TSDictionaryCacheEntry
+{
+	/* dictId is the hash lookup key and MUST BE FIRST */
+	Oid			dictId;
+	bool		isvalid;
+
+	/* most frequent fmgr call */
+	Oid			lexizeOid;
+	FmgrInfo	lexize;
+
+	MemoryContext dictCtx;		/* memory context to store private data */
+	void	   *dictData;
+} TSDictionaryCacheEntry;
+
+typedef struct
+{
+	int			len;
+	Oid		   *dictIds;
+} ListDictionary;
+
+typedef struct
+{
+	/* cfgId is the hash lookup key and MUST BE FIRST */
+	Oid			cfgId;
+	bool		isvalid;
+
+	Oid			prsId;
+
+	int			lenmap;
+	ListDictionary *map;
+} TSConfigCacheEntry;
+
+
+/*
+ * GUC variable for current configuration
+ */
+extern char *TSCurrentConfig;
+
+
+extern TSParserCacheEntry *lookup_ts_parser_cache(Oid prsId);
+extern TSDictionaryCacheEntry *lookup_ts_dictionary_cache(Oid dictId);
+extern TSConfigCacheEntry *lookup_ts_config_cache(Oid cfgId);
+
+extern Oid	getTSCurrentConfig(bool emitError);
+extern bool check_TSCurrentConfig(char **newval, void **extra, GucSource source);
+extern void assign_TSCurrentConfig(const char *newval, void *extra);
+
+#endif   /* TS_CACHE_H */