--- parser3/src/main/pa_sql_driver_manager.C	2001/09/26 10:32:26	1.38
+++ parser3/src/main/pa_sql_driver_manager.C	2001/10/29 08:05:37	1.43
@@ -4,7 +4,7 @@
 	Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com)
 	Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf)
 
-	$Id: pa_sql_driver_manager.C,v 1.38 2001/09/26 10:32:26 parser Exp $
+	$Id: pa_sql_driver_manager.C,v 1.43 2001/10/29 08:05:37 paf Exp $
 */
 
 #include "pa_sql_driver_manager.h"
@@ -13,6 +13,7 @@
 #include "pa_exception.h"
 #include "pa_common.h"
 #include "pa_threads.h"
+#include "pa_stack.h"
 
 // globals
 
@@ -31,23 +32,59 @@ public:
 		furl(aurl) {
 	}
 
-	/// allocates some bytes on pool
-	void *malloc(size_t size) { return Pooled::malloc(size); }
-	/// allocates some bytes clearing them with zeros
-	void *calloc(size_t size) { return Pooled::calloc(size); }
-	/// throw exception
-	void _throw(const char *comment) { 
-		THROW(0, 0, 
+	virtual void *malloc(size_t size) { return Pooled::malloc(size); }
+	virtual void *calloc(size_t size) { return Pooled::calloc(size); }
+
+	/**
+		the idea is to #1 jump to C++ some function to main body, where
+		every function stack frame has exception unwind information
+		and from there... #2 propagate_exception()
+	*/
+	virtual void _throw(const char *comment) { 
+		e=Exception(0, 0, 
 			&furl, 
 			comment); 
+
+		longjmp(mark, 1);
+	}
+	virtual void propagate_exception() {
+		throw e;
 	}
 
 private:
 	const String& furl;
+	Exception e;
 };
 
+// helpers
+
+static void expire_connection(Array::Item *value, void *info) {
+	SQL_Connection& connection=*static_cast<SQL_Connection *>(value);
+	time_t older_dies=reinterpret_cast<time_t>(info);
+
+	if(connection.connected() && connection.expired(older_dies))
+		connection.disconnect();
+}
+static void expire_connections(const Hash::Key& key, Hash::Val *value, void *info) {
+	Stack& stack=*static_cast<Stack *>(value);
+	for(int i=0; i<=stack.top_index(); i++)
+		expire_connection(stack.get(i), info);
+}
+
 // SQL_Driver_manager
 
+SQL_Driver_manager::SQL_Driver_manager(Pool& pool) : Pooled(pool),
+		driver_cache(pool),
+		connection_cache(pool),
+		prev_expiration_pass_time(0) {
+	
+}
+
+SQL_Driver_manager::~SQL_Driver_manager() {
+	connection_cache.for_each(expire_connections, 
+		reinterpret_cast<void *>((time_t)0/*=in past=expire all*/));
+}
+
 /// @param request_url protocol://[driver-dependent]
 SQL_Connection& SQL_Driver_manager::get_connection(const String& request_url,
 												   const String& request_origin,
@@ -56,7 +93,7 @@ SQL_Connection& SQL_Driver_manager::get_
 
 	// we have table for locating protocol's library
 	if(!protocol2driver_and_client)
-		PTHROW(0, 0,
+		throw Exception(0, 0,
 			&request_url,
 			"$"MAIN_SQL_NAME":"MAIN_SQL_DRIVERS_NAME" table must be defined");
 
@@ -73,7 +110,7 @@ SQL_Connection& SQL_Driver_manager::get_
 	else { // no cached connection or it were unpingabe: connect/reconnect
 		int pos=request_url.pos("://", 3);
 		if(pos<0)
-			PTHROW(0, 0,
+			throw Exception(0, 0,
 				request_url.size()?&request_url:&request_origin,
 				"connection string must start with protocol://"); // NOTE: not THROW, but PTHROW
 
@@ -103,33 +140,33 @@ SQL_Connection& SQL_Driver_manager::get_
 			const String *library=0;
 			if(protocol2driver_and_client->locate(0, global_protocol)) {
 				if(!(library=protocol2driver_and_client->item(1)) || library->size()==0)
-					PTHROW(0, 0,
+					throw Exception(0, 0,
 						protocol2driver_and_client->origin_string(),
 						"driver library column for protocol '%s' is empty", 
 							request_protocol_cstr);
 				dlopen_file_spec=protocol2driver_and_client->item(2);
 			} else
-				PTHROW(0, 0,
+				throw Exception(0, 0,
 					&request_url,
 					"undefined protocol '%s'", 
 						request_protocol_cstr);
 
 			if(lt_dlinit())
-				PTHROW(0, 0,
+				throw Exception(0, 0,
 					library,
 					"prepare to dynamic loading failed, %s", lt_dlerror());
 
 			const char *filename=library->cstr(String::UL_FILE_SPEC);
 			lt_dlhandle handle=lt_dlopen(filename);
 			if (!handle)
-				PTHROW(0, 0,
+				throw Exception(0, 0,
 					library,
 					"can not open the module, %s", lt_dlerror());
 
 			SQL_Driver_create_func create=(SQL_Driver_create_func)lt_dlsym(handle, 
 				SQL_DRIVER_CREATE_NAME);
 			if(!create)
-				PTHROW(0, 0,
+				throw Exception(0, 0,
 					library,
 					"function '"SQL_DRIVER_CREATE_NAME"' was not found");
 
@@ -139,7 +176,7 @@ SQL_Connection& SQL_Driver_manager::get_
 			// validate driver api version
 			int driver_api_version=driver->api_version();
 			if(driver_api_version!=SQL_DRIVER_API_VERSION)
-				PTHROW(0, 0,
+				throw Exception(0, 0,
 					library,
 					"driver implements API version 0x%04X not equal to 0x%04X",
 						driver_api_version, SQL_DRIVER_API_VERSION);
@@ -151,7 +188,7 @@ SQL_Connection& SQL_Driver_manager::get_
 				dlopen_file_spec->cstr(String::UL_FILE_SPEC):0;
 			if(const char *error=driver->initialize(
 				dlopen_file_spec_cstr))
-				PTHROW(0, 0,
+				throw Exception(0, 0,
 					library,
 					"driver failed to initialize client library '%s', %s",
 						specified_dlopen_file_spec?dlopen_file_spec_cstr:"unspecifed", 
@@ -228,18 +265,6 @@ void SQL_Driver_manager::put_connection_
 	connections->push(&connection);
 }
 
-static void expire_connection(Array::Item *value, void *info) {
-	SQL_Connection& connection=*static_cast<SQL_Connection *>(value);
-	time_t older_dies=reinterpret_cast<time_t>(info);
-
-	if(connection.connected() && connection.expired(older_dies))
-		connection.disconnect();
-}
-static void expire_connections(const Hash::Key& key, Hash::Val *value, void *info) {
-	Stack& stack=*static_cast<Stack *>(value);
-	for(int i=0; i<=stack.top_index(); i++)
-		expire_connection(stack.get(i), info);
-}
 void SQL_Driver_manager::maybe_expire_connection_cache() {
 	time_t now=time(0);