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Dynamic::Var SOO

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Dynamic::Var  small object optimization and some refactoring
This commit is contained in:
aleks-f
2013-02-05 22:12:21 -06:00
parent 54a92c59e5
commit 21da0129b6
16 changed files with 401 additions and 208 deletions
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144
Foundation/include/Poco/Dynamic/VarHolder.h
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@@ -50,6 +50,7 @@
#include "Poco/DateTimeFormatter.h"
#include "Poco/DateTimeParser.h"
#include "Poco/String.h"
#include "Poco/Any.h"
#include "Poco/Exception.h"
#include <vector>
#include <typeinfo>
@@ -68,6 +69,7 @@ class Var;
bool Foundation_API isJSONString(const Var& any);
/// Returns true for values that should be JSON-formatted as string.
void Foundation_API appendJSONString(std::string& val, const Var& any);
/// Converts the any to a JSON value and adds it to val
@@ -92,13 +94,17 @@ public:
virtual ~VarHolder();
/// Destroys the VarHolder.
virtual VarHolder* clone() const;
/// Throws NotImplementedException. Implementation should
virtual VarHolder* clone(Placeholder<VarHolder>* pHolder = 0) const = 0;
/// Implementation must implement this function to
/// deep-copy the VarHolder.
virtual const std::type_info& type() const;
/// Throws NotImplementedException. Implementation should
/// return the type information for the stored content.
/// If small object optimization is enabled (i.e. if
/// POCO_NO_SOO is not defined), VarHolder will be
/// instantiated in-place if it's size is smaller
/// than POCO_SMALL_OBJECT_SIZE.
virtual const std::type_info& type() const = 0;
/// Implementation must return the type information
/// (typeid) for the stored content.
virtual void convert(Int8& val) const;
/// Throws BadCastException. Must be overriden in a type
@@ -145,12 +151,15 @@ public:
/// specialization in order to suport the conversion.
#ifndef POCO_LONG_IS_64_BIT
void convert(long& val) const;
/// Calls convert(Int32).
void convert(unsigned long& val) const;
/// Calls convert(UInt32).
#endif
virtual void convert(bool& val) const;
/// Throws BadCastException. Must be overriden in a type
/// specialization in order to suport the conversion.
@@ -199,6 +208,35 @@ protected:
VarHolder();
/// Creates the VarHolder.
template <typename T>
VarHolder* cloneHolder(Placeholder<VarHolder>* pVarHolder, const T& val) const
/// Instantiates value holder wrapper. If size of the wrapper is
/// larger than POCO_SMALL_OBJECT_SIZE, holder is instantiated on
/// the heap, otherwise it is instantiated in-place (in the
/// pre-allocated buffer inside the holder).
///
/// Called from clone() member function of the implementation when
/// smal object optimization is enabled.
{
#ifdef POCO_NO_SOO
return new VarHolderImpl<T>(val);
#else
poco_check_ptr (pVarHolder);
if ((sizeof(VarHolderImpl<T>) <= pVarHolder->SIZE))
{
new ((VarHolder*) pVarHolder->holder) VarHolderImpl<T>(val);
pVarHolder->setLocal(true);
return (VarHolder*) pVarHolder->holder;
}
else
{
pVarHolder->pHolder = new VarHolderImpl<T>(val);
pVarHolder->setLocal(false);
return pVarHolder->pHolder;
}
#endif
}
template <typename F, typename T>
void convertToSmaller(const F& from, T& to) const
/// This function is meant to convert signed numeric values from
@@ -338,16 +376,6 @@ private:
// inlines
//
inline VarHolder* VarHolder::clone() const
{
throw NotImplementedException("Not implemented: VarHolder::clone()");
}
inline const std::type_info& VarHolder::type() const
{
throw NotImplementedException("Not implemented: VarHolder::type()");
}
inline void VarHolder::convert(Int8& /*val*/) const
{
@@ -414,8 +442,8 @@ inline void VarHolder::convert(Timestamp& /*val*/) const
throw BadCastException("Can not convert to Timestamp");
}
#ifndef POCO_LONG_IS_64_BIT
inline void VarHolder::convert(long& val) const
{
Int32 tmp;
@@ -430,8 +458,8 @@ inline void VarHolder::convert(unsigned long& val) const
convert(tmp);
val = tmp;
}
#endif
#endif
inline void VarHolder::convert(bool& /*val*/) const
{
@@ -533,9 +561,9 @@ public:
return typeid(T);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const T& value() const
@@ -634,9 +662,9 @@ public:
val = NumberFormatter::format(_val);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const Int8& value() const
@@ -767,9 +795,9 @@ public:
val = NumberFormatter::format(_val);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const Int16& value() const
@@ -900,9 +928,9 @@ public:
val = NumberFormatter::format(_val);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const Int32& value() const
@@ -1048,9 +1076,9 @@ public:
val = Timestamp(_val);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const Int64& value() const
@@ -1181,9 +1209,9 @@ public:
val = NumberFormatter::format(_val);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const UInt8& value() const
@@ -1314,9 +1342,9 @@ public:
val = NumberFormatter::format(_val);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const UInt16& value() const
@@ -1447,9 +1475,9 @@ public:
val = NumberFormatter::format(_val);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const UInt32& value() const
@@ -1601,9 +1629,9 @@ public:
val = Timestamp(tmp);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const UInt64& value() const
@@ -1732,9 +1760,9 @@ public:
val = (_val ? "true" : "false");
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const bool& value() const
@@ -1866,9 +1894,9 @@ public:
val = NumberFormatter::format(_val);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const float& value() const
@@ -2006,9 +2034,9 @@ public:
val = NumberFormatter::format(_val);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const double& value() const
@@ -2137,9 +2165,9 @@ public:
val = std::string(1, _val);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const char& value() const
@@ -2316,9 +2344,9 @@ public:
ts = tmp.timestamp();
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const std::string& value() const
@@ -2452,9 +2480,9 @@ public:
val = NumberFormatter::format(_val);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const long& value() const
@@ -2585,9 +2613,9 @@ public:
val = NumberFormatter::format(_val);
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const unsigned long& value() const
@@ -2678,9 +2706,9 @@ public:
val.append(" ]");
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const std::vector<T>& value() const
@@ -2799,9 +2827,9 @@ public:
ts = _val.timestamp();
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const DateTime& value() const
@@ -2895,9 +2923,9 @@ public:
ts = _val.timestamp();
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const LocalDateTime& value() const
@@ -2991,9 +3019,9 @@ public:
ts = _val;
}
VarHolder* clone() const
VarHolder* clone(Placeholder<VarHolder>* pVarHolder = 0) const
{
return new VarHolderImpl(_val);
return cloneHolder(pVarHolder, _val);
}
const Timestamp& value() const