--- /dev/null
+#ifndef STLPLUS_PERSISTENT_CONTEXTS\r
+#define STLPLUS_PERSISTENT_CONTEXTS\r
+////////////////////////////////////////////////////////////////////////////////\r
+\r
+// Author: Andy Rushton\r
+// Copyright: (c) Southampton University 1999-2004\r
+// (c) Andy Rushton 2004-2009\r
+// License: BSD License, see ../docs/license.html\r
+\r
+// Core context classes used to control the persistent dump/restore operations\r
+\r
+////////////////////////////////////////////////////////////////////////////////\r
+\r
+#include "persistence_fixes.hpp"\r
+#include "persistent.hpp"\r
+#include <iostream>\r
+#include <map>\r
+#include <typeinfo>\r
+\r
+////////////////////////////////////////////////////////////////////////////////\r
+\r
+namespace stlplus\r
+{\r
+\r
+ ////////////////////////////////////////////////////////////////////////////////\r
+ // Internals\r
+\r
+ class dump_context_body;\r
+ class restore_context_body;\r
+\r
+ ////////////////////////////////////////////////////////////////////////////////\r
+ // The format version number currently supported\r
+ ////////////////////////////////////////////////////////////////////////////////\r
+\r
+ extern unsigned char PersistentVersion;\r
+\r
+ ////////////////////////////////////////////////////////////////////////////////\r
+ // dump_context controls the formatting of a persistent dump\r
+ ////////////////////////////////////////////////////////////////////////////////\r
+\r
+ class dump_context\r
+ {\r
+ friend class persistent;\r
+ public:\r
+ //////////////////////////////////////////////////////////////////////////////\r
+\r
+ // device must be in binary mode\r
+ dump_context(std::ostream& device, unsigned char version = PersistentVersion) throw(persistent_dump_failed);\r
+ ~dump_context(void);\r
+\r
+ // low level output used to dump a byte\r
+ void put(unsigned char data) throw(persistent_dump_failed);\r
+\r
+ // access the device, for example to check the error status\r
+ const std::ostream& device(void) const;\r
+\r
+ // recover the version number of the dumped output\r
+ unsigned char version(void) const;\r
+\r
+ // test whether the current platform uses little-endian or big-endian addressing of bytes\r
+ // this is used in dump/restore of integers and is exported so that other routines can use it\r
+ bool little_endian(void) const;\r
+\r
+ // Assist functions for Pointers\r
+ // the return pair value is a flag saying whether this is a new pointer and the magic key to dump to file\r
+ std::pair<bool,unsigned> pointer_map(const void* const pointer);\r
+\r
+ // Assist functions for Polymorphous classes (i.e. subclasses) using callback approach\r
+ typedef void (*dump_callback)(dump_context&,const void*);\r
+ unsigned register_callback(const std::type_info& info, dump_callback);\r
+ bool is_callback(const std::type_info& info) const;\r
+ typedef std::pair<unsigned,dump_callback> callback_data;\r
+ callback_data lookup_callback(const std::type_info&) const throw(persistent_illegal_type);\r
+\r
+ // Assist functions for Polymorphous classes (i.e. subclasses) using interface approach\r
+ unsigned register_interface(const std::type_info& info);\r
+ bool is_interface(const std::type_info& info) const;\r
+ unsigned lookup_interface(const std::type_info&) const throw(persistent_illegal_type);\r
+\r
+ // Register all Polymorphous classes using either approach by calling an installer callback\r
+ typedef void (*installer)(dump_context&);\r
+ void register_all(installer);\r
+\r
+ private:\r
+ friend class dump_context_body;\r
+ dump_context_body* m_body;\r
+\r
+ // disallow copying by making assignment and copy constructor private\r
+ dump_context(const dump_context&);\r
+ dump_context& operator=(const dump_context&);\r
+ };\r
+\r
+ ////////////////////////////////////////////////////////////////////////////////\r
+ // restore_context controls the reading of the persistent data during a restore\r
+\r
+ class restore_context\r
+ {\r
+ friend class persistent;\r
+ public:\r
+ //////////////////////////////////////////////////////////////////////////////\r
+\r
+ // device must be in binary mode\r
+ restore_context(std::istream& device) throw(persistent_restore_failed);\r
+ ~restore_context(void);\r
+\r
+ // low level input used to restore a byte\r
+ int get(void) throw(persistent_restore_failed);\r
+\r
+ // access the device, for example to check the error status\r
+ const std::istream& device(void) const;\r
+\r
+ // access the version number of the input being restored\r
+ unsigned char version(void) const;\r
+\r
+ // test whether the current platform uses little-endian or big-endian addressing of bytes\r
+ // this is used in dump/restore of integers\r
+ bool little_endian(void) const;\r
+\r
+ // Assist functions for Pointers\r
+ std::pair<bool,void*> pointer_map(unsigned magic);\r
+ void pointer_add(unsigned magic, void* new_pointer);\r
+\r
+ // Assist functions for Polymorphous classes using the callback approach\r
+ typedef void* (*create_callback)(void);\r
+ typedef void (*restore_callback)(restore_context&,void*);\r
+ unsigned register_callback(create_callback,restore_callback);\r
+ bool is_callback(unsigned) const;\r
+ typedef std::pair<create_callback, restore_callback> callback_data;\r
+ callback_data lookup_callback(unsigned) const throw(persistent_illegal_type);\r
+\r
+ // Assist functions for Polymorphous classes using the interface approach\r
+ unsigned register_interface(persistent*);\r
+ bool is_interface(unsigned) const;\r
+ persistent* lookup_interface(unsigned) const throw(persistent_illegal_type);\r
+\r
+ // Register all Polymorphous classes using either approach by calling an installer callback\r
+ typedef void (*installer)(restore_context&);\r
+ void register_all(installer);\r
+\r
+ private:\r
+ friend class restore_context_body;\r
+ restore_context_body* m_body;\r
+\r
+ typedef std::pair<unsigned,persistent*> interface_data;\r
+\r
+ // disallow copying by making assignment and copy constructor private\r
+ restore_context(const restore_context&);\r
+ restore_context& operator=(const restore_context&);\r
+ };\r
+\r
+ ////////////////////////////////////////////////////////////////////////////////\r
+\r
+} // end namespace stlplus\r
+\r
+ ////////////////////////////////////////////////////////////////////////////////\r
+#endif\r
projects / chaz / yoink / blobdiff