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/*
* Copyright (c) 2002-2005 The Regents of The University of Michigan
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met: redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer;
* redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution;
* neither the name of the copyright holders nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef __SIM_PARAM_HH__
#define __SIM_PARAM_HH__
#include <iostream>
#include <list>
#include <string>
#include <vector>
#include "sim/configfile.hh"
#include "sim/startup.hh"
// forward decls
class BaseParam;
class SimObject;
//
// The context of a parameter definition... usually a subclass of
// SimObjectBuilder (which derives from ParamContext), but abstracted
// here to support more global simulator control parameters as well.
//
class ParamContext : protected StartupCallback
{
private:
// static list of all ParamContext objects, built as a side effect
// of the ParamContext constructor
static std::list<ParamContext *> *ctxList;
protected:
// .ini file (database) for parameter lookup... initialized on call
// to parseParams()
IniFile *iniFilePtr;
// .ini file section for parameter lookup
const std::string iniSection;
typedef std::vector<BaseParam *> ParamList;
// list of parameters defined in this context
ParamList *paramList;
ParamList *getParamList() {
if (!paramList)
paramList = new ParamList;
return paramList;
}
public:
/// Initialization phases for ParamContext objects.
enum InitPhase {
NoAutoInit = -1, ///< Don't initialize at all... params
/// will be parsed later (used by
/// SimObjectBuilder, which parses
/// params in SimObject::create().
OutputInitPhase = 0, ///< Output stream initialization
TraceInitPhase = 1, ///< Trace context initialization:
/// depends on output streams, but
/// needs to come before others so we
/// can use tracing in other
/// ParamContext init code
StatsInitPhase = 2, ///< Stats output initialization
DefaultInitPhase = 3 ///< Everything else
};
/// Records the initialization phase for this ParamContext.
InitPhase initPhase;
/// Constructor.
/// @param _iniSection Name of .ini section corresponding to this context.
/// @param _initPhase Initialization phase (see InitPhase).
ParamContext(const std::string &_iniSection,
InitPhase _initPhase = DefaultInitPhase);
virtual ~ParamContext() {}
// add a parameter to the context... called from the parameter
// object's constructor (see BaseParam::BaseParam())
void addParam(BaseParam *);
// call parse() on all params in this context to convert string
// representations to parameter values
virtual void parseParams(IniFile &iniFile);
// Check parameter values for validity & consistency. Default
// implementation is no-op; derive subclass & override to add
// actual functionality here
virtual void checkParams();
// Clean up at end of execution: close file descriptors, etc.
// Default implementation is no-op; derive subclass & override to
// add actual functionality here
virtual void cleanup();
// dump parameter descriptions
void describeParams(std::ostream &);
// Display the parameters & values used
void showParams(std::ostream &);
// print context information for parameter error
virtual void printErrorProlog(std::ostream &);
// resolve a SimObject name in this context to an object pointer.
virtual SimObject *resolveSimObject(const std::string &name);
// generate the name for this instance of this context (used as a
// prefix to create unique names in resolveSimObject()
virtual const std::string &getInstanceName() { return iniSection; }
// return the configuration hierarchy node for this context. Bare
// ParamContext objects have no corresponding node, so the default
// implementation returns NULL.
virtual ConfigNode *getConfigNode() { return NULL; }
// Parse all parameters registered with all ParamContext objects.
static void parseAllContexts(IniFile &iniFile);
// Check all parameters registered with all ParamContext objects.
// (calls checkParams() on each)
static void checkAllContexts();
// Print all parameter values on indicated ostream.
static void showAllContexts(std::ostream &os);
// Clean up all registered ParamContext objects. (calls cleanup()
// on each)
static void cleanupAllContexts();
// print descriptions of all parameters registered with all
// ParamContext objects
static void describeAllContexts(std::ostream &os);
};
//
// Base class for all parameter objects
//
class BaseParam
{
public:
ParamContext *context;
std::string name;
std::string description; // text description for help message
bool wasSet; // true if parameter was set by user
bool hasDefault; // true if parameter has default value
BaseParam(ParamContext *_context, const std::string &_name,
const std::string &_description, bool _hasDefault)
: context(_context), name(_name), description(_description),
wasSet(false), hasDefault(_hasDefault)
{
context->addParam(this);
}
virtual ~BaseParam() {}
// a parameter is valid only if its value was set by the user or
// it has a default value
bool isValid() const
{
return (wasSet || hasDefault);
}
// set value by parsing string
virtual void parse(const std::string &s) = 0;
// display value to stream
virtual void showValue(std::ostream &) const = 0;
// display type to stream
virtual void showType(std::ostream &) const = 0;
// signal parse or usage error
virtual void die(const std::string &err) const;
};
//
// Template classes to specialize parameters to specific types.
//
// Param<T> is for single-valued (scalar) parameters of type T.
// VectorParam<T> is for multi-valued (vector) parameters of type T.
// These are specified in the .ini file as a space-delimited list of
// arguments.
//
template <class T>
class Param : public BaseParam
{
protected:
T value;
public:
// Param with default value: set value to default
Param(ParamContext *context,
const std::string &name, const std::string &description, T dfltValue)
: BaseParam(context, name, description, true),
value(dfltValue)
{
}
// Param with no default value: leave value uninitialized
Param(ParamContext *context,
const std::string &name, const std::string &description)
: BaseParam(context, name, description, false)
{
}
virtual ~Param() {}
operator T&()
{
// if we attempt to reference an invalid parameter (i.e., one
// with no default value that was not set by the user), die.
if (!isValid())
die("not found");
return value;
}
// display value to stream
virtual void showValue(std::ostream &os) const;
// display type to stream
virtual void showType(std::ostream &) const;
// set value by parsing string
virtual void parse(const std::string &s);
};
//
// Template class for vector-valued parameters (lists)
//
template <class T>
class VectorParam : public BaseParam
{
protected:
std::vector<T> value;
public:
typedef typename std::vector<T>::size_type size_type;
// Param with default value: set value to default
VectorParam(ParamContext *context, const std::string &name,
const std::string &description,
const std::vector<T> &dfltValue)
: BaseParam(context, name, description, true),
value(dfltValue)
{
}
// Param with no default value: leave value uninitialized
VectorParam(ParamContext *context,
const std::string &name, const std::string &description)
: BaseParam(context, name, description, false)
{
}
virtual ~VectorParam() {}
// basic vector access methods
size_type size() const
{
if (!isValid())
die("not found");
return value.size();
}
const T &operator[](size_type n) const
{
if (!isValid())
die("not found");
return value[n];
}
// return reference to value vector
operator std::vector<T>&()
{
if (!isValid())
die("not found");
return value;
}
// display value to stream
virtual void showValue(std::ostream &os) const;
// display type to stream
virtual void showType(std::ostream &) const;
// set value by parsing string
virtual void parse(const std::string &s);
};
//
// Specialization of Param<int> and VectorParam<int> to handle
// enumerated types is done in two ways, using SimpleEnumParam and
// MappedEnumParam (and their vector counterparts,
// SimpleEnumVectorParam and MappedEnumVectorParam). SimpleEnumParam
// takes an array of strings and maps them to integers based on array
// index. MappedEnumParam takes an array of string-to-int mappings,
// allowing for mapping strings to non-contiguous integer values, or
// mapping multiple strings to the same integer value.
//
// Both SimpleEnumParam and MappedEnumParam are implemented using a
// single template class, EnumParam<Map>, which takes the type of the map
// as a parameter (const char * or EnumParamMap). Similarly,
// SimpleEnumVectorParam and MappedEnumVectorParam are both
// implemented using EnumVectorParam<Map>.
//
template <class Map>
class EnumParam : public Param<int>
{
const int num_values;
const Map *map;
public:
// Param with default value: set value to default
EnumParam(ParamContext *context,
const std::string &name, const std::string &description,
const Map *_map, int _num_values,
int dfltValue)
: Param<int>(context, name, description, dfltValue),
num_values(_num_values), map(_map)
{
}
// Param with no default value: leave value uninitialized
EnumParam(ParamContext *context,
const std::string &name, const std::string &description,
const Map *_map, int _num_values)
: Param<int>(context, name, description),
num_values(_num_values), map(_map)
{
}
virtual ~EnumParam() {}
// display value to stream
virtual void showValue(std::ostream &os) const;
// display type to stream
virtual void showType(std::ostream &) const;
// set value by parsing string
virtual void parse(const std::string &s);
};
//
// Vector counterpart to SimpleEnumParam
//
template <class Map>
class EnumVectorParam : public VectorParam<int>
{
const int num_values;
const Map *map;
public:
// Param with default value: set value to default
EnumVectorParam(ParamContext *context,
const std::string &name, const std::string &description,
const Map *_map, int _num_values,
std::vector<int> &dfltValue)
: VectorParam<int>(context, name, description, dfltValue),
num_values(_num_values), map(_map)
{
}
// Param with no default value: leave value uninitialized
EnumVectorParam(ParamContext *context,
const std::string &name, const std::string &description,
const Map *_map, int _num_values)
: VectorParam<int>(context, name, description),
num_values(_num_values), map(_map)
{
}
virtual ~EnumVectorParam() {}
// display value to stream
virtual void showValue(std::ostream &os) const;
// display type to stream
virtual void showType(std::ostream &) const;
// set value by parsing string
virtual void parse(const std::string &s);
};
// Specialize EnumParam for a particular enumeration type ENUM
// (automates casting to get value of enum type)
template <class ENUM>
class SimpleEnumParam : public EnumParam<const char *>
{
public:
SimpleEnumParam(ParamContext *context,
const std::string &name, const std::string &description,
const char **_map, int _num_values,
ENUM dfltValue)
: EnumParam<const char *>(context, name, description,
_map, _num_values, (int)dfltValue)
{
}
SimpleEnumParam(ParamContext *context,
const std::string &name, const std::string &description,
const char **_map, int _num_values)
: EnumParam<const char *>(context, name, description,
_map, _num_values)
{
}
operator ENUM() const
{
if (!isValid())
die("not found");
return (ENUM)value;
}
};
// Specialize EnumParam for a particular enumeration type ENUM
// (automates casting to get value of enum type)
template <class ENUM>
class SimpleEnumVectorParam : public EnumVectorParam<const char *>
{
public:
// skip default value constructor: too much pain to convert
// vector<ENUM> initializer to vector<int>
SimpleEnumVectorParam(ParamContext *context,
const std::string &name,
const std::string &description,
const char **_map, int _num_values)
: EnumVectorParam<const char *>(context, name, description,
_map, _num_values)
{
}
ENUM operator[](size_type n)
{
if (!isValid())
die("not found");
return (ENUM)value[n];
}
};
//
// Handle enums via string-to-int map (see comment above).
//
// An array of string-to-int mappings must be supplied using the
// following type.
typedef struct {
const char *name;
int value;
} EnumParamMap;
// Specialize EnumParam for a particular enumeration type ENUM
// (automates casting to get value of enum type)
template <class ENUM>
class MappedEnumParam : public EnumParam<EnumParamMap>
{
public:
MappedEnumParam(ParamContext *context,
const std::string &name, const std::string &description,
const EnumParamMap *_map, int _num_values,
ENUM dfltValue)
: EnumParam<EnumParamMap>(context, name, description,
_map, _num_values, (int)dfltValue)
{
}
MappedEnumParam(ParamContext *context,
const std::string &name, const std::string &description,
const EnumParamMap *_map, int _num_values)
: EnumParam<EnumParamMap>(context, name, description,
_map, _num_values)
{
}
operator ENUM()
{
if (!isValid())
die("not found");
return (ENUM)value[this->n];
}
};
// Specialize EnumParam for a particular enumeration type ENUM
// (automates casting to get value of enum type)
template <class ENUM>
class MappedEnumVectorParam : public EnumVectorParam<EnumParamMap>
{
public:
// skip default value constructor: too much pain to convert
// vector<ENUM> initializer to vector<int>
MappedEnumVectorParam(ParamContext *context,
const std::string &name,
const std::string &description,
const EnumParamMap *_map, int _num_values)
: EnumVectorParam<EnumParamMap>(context, name, description,
_map, _num_values)
{
}
ENUM operator[](size_type n)
{
if (!isValid())
die("not found");
return (ENUM)value[n];
}
};
//
// Parameters that point to other simulation objects (e.g. caches,
// busses, etc.) are handled by specializing SimObjectBaseParam to the
// specific subtype. The main purpose of SimObjectBaseParam is to
// provide a place to stick several helper functions common to all
// SimObject-derived parameters.
//
class SimObjectBaseParam : public BaseParam
{
public:
SimObjectBaseParam(ParamContext *context, const std::string &name,
const std::string &description, bool hasDefault)
: BaseParam(context, name, description, hasDefault)
{
}
virtual ~SimObjectBaseParam() {}
// helper function for SimObjectParam<T>::showValue()
void showValue(std::ostream &os, SimObject *obj) const;
// helper function for SimObjectParam<T>::parse()
void parse(const std::string &s, SimObject *&value);
// helper function for SimObjectParam<T>::parse()
void parse(const std::string &s, std::vector<SimObject *>&value_vec);
};
//
// Parameter to a specific type of SimObject. Note that T must be a
// pointer to a class derived from SimObject (e.g., <CPU *>).
//
template <class T> class SimObjectParam;
template <class T>
class SimObjectParam<T *> : public SimObjectBaseParam
{
protected:
T *value;
public:
// initialization w/o default
SimObjectParam(ParamContext *context,
const std::string &name, const std::string &description)
: SimObjectBaseParam(context, name, description, false)
{
}
// initialization wit=h default
SimObjectParam(ParamContext *context,
const std::string &name, const std::string &description,
T *dfltValue)
: SimObjectBaseParam(context, name, description, true),
value(dfltValue)
{
}
virtual ~SimObjectParam() {}
// convert to pointer
operator T*()
{
if (!isValid())
die("not found");
return value;
}
T *operator->() const
{
if (!isValid())
die("not found");
return value;
}
// display value to stream
virtual void showValue(std::ostream &os) const
{
SimObjectBaseParam::showValue(os, value);
}
// display type to stream: see REGISTER_SIM_OBJECT macro in
// sim_object.hh for declaration
virtual void showType(std::ostream &os) const;
// set value by parsing string
virtual void parse(const std::string &s)
{
SimObject *so_ptr;
// first parse to generic SimObject *
SimObjectBaseParam::parse(s, so_ptr);
// now dynamic_cast to specific derived type
value = dynamic_cast<T *>(so_ptr);
// check for failure of dynamic_cast
if (value == NULL && so_ptr != NULL)
die("not of appropriate type");
}
};
//
// Vector counterpart to SimObjectParam<T>
//
template <class T> class SimObjectVectorParam;
template <class T>
class SimObjectVectorParam<T *> : public SimObjectBaseParam
{
protected:
std::vector<T *> value;
public:
typedef typename std::vector<T *>::size_type size_type;
SimObjectVectorParam(ParamContext *context,
const std::string &name,
const std::string &description)
: SimObjectBaseParam(context, name, description, false)
{
}
SimObjectVectorParam(ParamContext *context,
const std::string &name,
const std::string &description,
std::vector<T *> dfltValue)
: SimObjectBaseParam(context, name, description, true),
value(dfltValue)
{
}
virtual ~SimObjectVectorParam() {}
// basic vector access methods
size_type size() const
{
if (!isValid())
die("not found");
return value.size();
}
T *&operator[](size_type n)
{
if (!isValid())
die("not found");
return value[n];
}
// return reference to value vector
operator std::vector<T *>&()
{
if (!isValid())
die("not found");
return value;
}
// display value to stream
virtual void showValue(std::ostream &os) const
{
for (int i = 0; i < value.size(); i++) {
if (i != 0)
os << " ";
SimObjectBaseParam::showValue(os, value[i]);
}
}
// display type to stream: see
virtual void showType(std::ostream &os) const;
// set value by parsing string
virtual void parse(const std::string &s)
{
std::vector<SimObject *> so_ptr_vec;
// first parse to generic SimObject * vector (from SimObjectBaseParam)
SimObjectBaseParam::parse(s, so_ptr_vec);
value.resize(so_ptr_vec.size());
for (int i = 0; i < so_ptr_vec.size(); ++i) {
// now dynamic_cast to specific derived type
value[i] = dynamic_cast<T *>(so_ptr_vec[i]);
// check for failure of dynamic_cast
if (value[i] == NULL && so_ptr_vec[i] != NULL)
die("not of appropriate type");
}
}
};
//
// Macro to define showType() methods for SimObjectParam &
// SimObjectVectorParam. Can't do this automatically as it requires a
// string name for the type, which you can't get from a template
// argument. For concrete derived SimObject types, this macro is
// automatically invoked by REGISTER_SIM_OBJECT() (see sim_object.hh).
//
#define DEFINE_SIM_OBJECT_CLASS_NAME(CLASS_NAME, OBJ_CLASS) \
void \
SimObjectParam<OBJ_CLASS *>::showType(std::ostream &os) const \
{ \
os << CLASS_NAME; \
} \
\
void \
SimObjectVectorParam<OBJ_CLASS *>::showType(std::ostream &os) const \
{ \
os << "vector of " << CLASS_NAME; \
}
//
// Declarations for low-level parsing & displaying functions. These
// are used internally, but should not be used directly by clients of
// the parameter mechanism, but are declared here so they can be
// shared with the serialization code (see sim/serialize.cc).
template <class T> bool parseParam(const std::string &str, T &data);
template <class T> void showParam(std::ostream &os, const T &data);
#endif // _SIM_PARAM_HH_
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