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28 * Authors: Nathan Binkert
34 * Serialization Interface Declarations
37 #ifndef __SERIALIZE_HH__
38 #define __SERIALIZE_HH__
46 #include "base/types.hh"
54 void paramOut(std::ostream &os, const std::string &name, const T ¶m);
57 void paramIn(Checkpoint *cp, const std::string §ion,
58 const std::string &name, T ¶m);
61 void arrayParamOut(std::ostream &os, const std::string &name,
62 const T *param, int size);
65 void arrayParamOut(std::ostream &os, const std::string &name,
66 const std::vector<T> ¶m);
69 void arrayParamIn(Checkpoint *cp, const std::string §ion,
70 const std::string &name, T *param, int size);
73 void arrayParamIn(Checkpoint *cp, const std::string §ion,
74 const std::string &name, std::vector<T> ¶m);
77 objParamIn(Checkpoint *cp, const std::string §ion,
78 const std::string &name, SimObject * ¶m);
82 // These macros are streamlined to use in serialize/unserialize
83 // functions. It's assumed that serialize() has a parameter 'os' for
84 // the ostream, and unserialize() has parameters 'cp' and 'section'.
85 #define SERIALIZE_SCALAR(scalar) paramOut(os, #scalar, scalar)
87 #define UNSERIALIZE_SCALAR(scalar) paramIn(cp, section, #scalar, scalar)
89 // ENUMs are like SCALARs, but we cast them to ints on the way out
90 #define SERIALIZE_ENUM(scalar) paramOut(os, #scalar, (int)scalar)
92 #define UNSERIALIZE_ENUM(scalar) \
95 paramIn(cp, section, #scalar, tmp); \
96 scalar = (typeof(scalar))tmp; \
99 #define SERIALIZE_ARRAY(member, size) \
100 arrayParamOut(os, #member, member, size)
102 #define UNSERIALIZE_ARRAY(member, size) \
103 arrayParamIn(cp, section, #member, member, size)
105 #define SERIALIZE_OBJPTR(objptr) paramOut(os, #objptr, (objptr)->name())
107 #define UNSERIALIZE_OBJPTR(objptr) \
110 objParamIn(cp, section, #objptr, sptr); \
111 objptr = dynamic_cast<typeof(objptr)>(sptr); \
115 * Basic support for object serialization.
120 void nameOut(std::ostream &os);
121 void nameOut(std::ostream &os, const std::string &_name);
125 virtual ~Serializable();
127 // manditory virtual function, so objects must provide names
128 virtual const std::string name() const = 0;
130 virtual void serialize(std::ostream &os);
131 virtual void unserialize(Checkpoint *cp, const std::string §ion);
133 static Serializable *create(Checkpoint *cp, const std::string §ion);
135 static int ckptCount;
136 static int ckptMaxCount;
137 static int ckptPrevCount;
138 static void serializeAll(const std::string &cpt_dir);
139 static void unserializeAll(const std::string &cpt_dir);
140 static void unserializeGlobals(Checkpoint *cp);
144 // A SerializableBuilder serves as an evaluation context for a set of
145 // parameters that describe a specific instance of a Serializable. This
146 // evaluation context corresponds to a section in the .ini file (as
147 // with the base ParamContext) plus an optional node in the
148 // configuration hierarchy (the configNode member) for resolving
149 // Serializable references. SerializableBuilder is an abstract superclass;
150 // derived classes specialize the class for particular subclasses of
151 // Serializable (e.g., BaseCache).
153 // For typical usage, see the definition of
154 // SerializableClass::createObject().
156 class SerializableBuilder
160 SerializableBuilder() {}
162 virtual ~SerializableBuilder() {}
164 // Create the actual Serializable corresponding to the parameter
165 // values in this context. This function is overridden in derived
166 // classes to call a specific constructor for a particular
167 // subclass of Serializable.
168 virtual Serializable *create() = 0;
172 // An instance of SerializableClass corresponds to a class derived from
173 // Serializable. The SerializableClass instance serves to bind the string
174 // name (found in the config file) to a function that creates an
175 // instance of the appropriate derived class.
177 // This would be much cleaner in Smalltalk or Objective-C, where types
178 // are first-class objects themselves.
180 class SerializableClass
184 // Type CreateFunc is a pointer to a function that creates a new
185 // simulation object builder based on a .ini-file parameter
186 // section (specified by the first string argument), a unique name
187 // for the object (specified by the second string argument), and
188 // an optional config hierarchy node (specified by the third
189 // argument). A pointer to the new SerializableBuilder is returned.
190 typedef Serializable *(*CreateFunc)(Checkpoint *cp,
191 const std::string §ion);
193 static std::map<std::string,CreateFunc> *classMap;
195 // Constructor. For example:
197 // SerializableClass baseCacheSerializableClass("BaseCacheSerializable",
198 // newBaseCacheSerializableBuilder);
200 SerializableClass(const std::string &className, CreateFunc createFunc);
202 // create Serializable given name of class and pointer to
203 // configuration hierarchy node
204 static Serializable *createObject(Checkpoint *cp,
205 const std::string §ion);
209 // Macros to encapsulate the magic of declaring & defining
210 // SerializableBuilder and SerializableClass objects
213 #define REGISTER_SERIALIZEABLE(CLASS_NAME, OBJ_CLASS) \
214 SerializableClass the##OBJ_CLASS##Class(CLASS_NAME, \
215 OBJ_CLASS::createForUnserialize);
218 setCheckpointDir(const std::string &name);
225 const std::string basePath;
226 std::map<std::string, Serializable*> objMap;
229 Checkpoint(const std::string &cpt_dir, const std::string &path);
231 const std::string cptDir;
233 bool find(const std::string §ion, const std::string &entry,
236 bool findObj(const std::string §ion, const std::string &entry,
239 bool sectionExists(const std::string §ion);
241 // The following static functions have to do with checkpoint
242 // creation rather than restoration. This class makes a handy
243 // namespace for them though.
245 // Export current checkpoint directory name so other objects can
246 // derive filenames from it (e.g., memory). The return value is
247 // guaranteed to end in '/' so filenames can be directly appended.
248 // This function is only valid while a checkpoint is being created.
249 static std::string dir();
251 // Filename for base checkpoint file within directory.
252 static const char *baseFilename;
255 #endif // __SERIALIZE_HH__