--- parser3/src/include/pa_pool.h	2001/01/27 15:00:04	1.7
+++ parser3/src/include/pa_pool.h	2002/02/08 08:30:13	1.78
@@ -1,38 +1,181 @@
-/*
-  $Id: pa_pool.h,v 1.7 2001/01/27 15:00:04 paf Exp $
+/** @file
+	Parser: pool class decl.
+
+	Copyright (c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
+
+	Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
+
+	$Id: pa_pool.h,v 1.78 2002/02/08 08:30:13 paf Exp $
 */
 
 #ifndef PA_POOL_H
 #define PA_POOL_H
 
-#include <stddef.h>
+#include "pa_config_includes.h"
+
+#ifdef XML
+#	include "gdome.h"
+// for xmlChar
+#	include "libxml/tree.h"
+#endif
 
-#include "pa_string.h"
-#include "pa_hash.h"
-#include "pa_array.h"
+// forwards
+
+class Exception;
+class String;
+class Charset;
+class GdomeDOMString_auto_ptr;
+
+/** 
+	Pool mechanizm allows users not to free up allocated memory,
+	leaving that problem to 'pools'.
+
+	@see Pooled
+*/
 
 class Pool {
 public:
-	Pool();
-	~Pool();
-    void *malloc(size_t size);
-    void *calloc(size_t size);
 
-	String *make_string() { 
-		return new(this) String(this);
+	Pool(void *astorage);
+
+	///{@ statistics
+	size_t total_allocated() { return ftotal_allocated; }
+	unsigned int total_times() { return ftotal_times; }
+	///}@
+
+	void set_context(void *acontext) { fcontext=acontext; }
+	void *get_context() { return fcontext; }
+
+	/// allocates some bytes on pool
+	void *malloc(size_t size, int place=0) {
+		return check(real_malloc(size, place), size);
 	}
-	String *make_string(char *src) {
-		return new(this) String(this, src);
+	/// allocates some bytes clearing them with zeros
+	void *calloc(size_t size) {
+		return check(real_calloc(size), size);
 	}
-	Hash *make_hash() {
-		return new(this) Hash(this);
+
+	/// registers a routine to clean up non-pooled allocations
+	void register_cleanup(void (*cleanup) (void *), void *data) {
+		if(!real_register_cleanup(cleanup, data))
+			fail_register_cleanup();
 	}
-	Array *make_array() {
-		return new(this) Array(this);
+
+	///{@ source charset
+	void set_source_charset(Charset& acharset);
+	Charset& get_source_charset();
+	///}@
+
+	///{@ client charset
+	void set_client_charset(Charset& charset);
+	Charset& get_client_charset();
+	///}@
+
+#ifdef XML
+
+	/// @see Charset::transcode_cstr(xmlChar *s);
+	const char *transcode_cstr(xmlChar *s);
+	/// @see Charset::transcode(xmlChar *s);
+	String& transcode(xmlChar *s);
+	/// @see Charset::transcode_cstr(GdomeDOMString *s);
+	const char *transcode_cstr(GdomeDOMString *s);
+	/// @see Charset::transcode(GdomeDOMString *s);
+	String& transcode(GdomeDOMString *s);
+	/// @see Charset::transcode(const String& s)
+	GdomeDOMString_auto_ptr transcode(const String& s);
+
+#endif
+
+private:
+
+	void *fstorage;
+	void *fcontext;
+	Charset *source_charset;
+	Charset *client_charset;
+
+private: 
+	
+	//{
+	/// @name implementation defined
+    void *real_malloc(size_t size, int place);
+    void *real_calloc(size_t size);
+	bool real_register_cleanup(void (*cleanup) (void *), void *data);
+	//}
+
+private: 
+
+	/// checks whether mem allocated OK. throws exception otherwise
+	void *check(void *ptr, size_t size) {
+		if(ptr) {
+			ftotal_allocated+=size;
+			ftotal_times++;
+			return ptr;
+		}
+
+		fail_alloc(size);
+
+		// never reached
+		return 0;
 	}
-	Array *make_array(int initial_rows) {
-		return new(this) Array(this, initial_rows);
+	/// throws allocation exception
+	void fail_alloc(size_t size) const;
+
+	/// throws register cleanup exception
+	void fail_register_cleanup() const;
+
+private: // statistics
+	
+	size_t ftotal_allocated;
+	unsigned int ftotal_times;
+
+private: //disabled
+
+	Pool(const Pool&);
+	Pool& operator= (const Pool&);
+};
+
+/** 
+	Base for all classes that are allocated in 'pools'.
+
+	Holds Pool object. Contains useful wrappers to it's methods.
+
+	@see NEW
+*/
+class Pooled {
+	// the pool i'm allocated on
+	Pool *fpool;
+public:
+
+	/// the Pooled-sole: Pooled instances can be allocated in Pool rather then on heap
+	static void *operator new(size_t size, Pool& apool) { 
+		return apool.malloc(size, 1);
 	}
+
+	Pooled(Pool& apool) : fpool(&apool) {}
+
+	/// my pool
+	Pool& pool() const { return *fpool; }
+
+	/** used for moving objects from one pool to another. 
+		in between object can have no pool and can not be used
+		@see SQL_Driver_manager
+	*/
+	void set_pool(Pool *apool) { fpool=apool; }
+
+	//{
+	/// @name useful wrapper around pool
+	void *malloc(size_t size, int place=0) const { return fpool->malloc(size, place); }
+	void *calloc(size_t size) const { return fpool->calloc(size); }
+	void register_cleanup(void (*cleanup) (void *), void *data) { fpool->register_cleanup(cleanup, data); }
+#ifdef XML
+
+	const char *transcode_cstr(GdomeDOMString *s) { return fpool->transcode_cstr(s); }
+	String& transcode(GdomeDOMString *s) { return fpool->transcode(s); }
+
+#endif
+	//}
 };
+/// useful macro for creating objects on current Pooled object Pooled::pool()
+#define NEW new(pool())
 
 #endif