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MCOL-1201 manual rebase with develop. Obsoletes branch MCOL-1201

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This commit is contained in:
David Hall
2018-05-11 09:50:10 -05:00
parent 12b1d99f51
commit 6fa7dded6f
30 changed files with 2255 additions and 1196 deletions
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270
utils/common/any.hpp
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@ -9,123 +9,142 @@
* http://www.boost.org/LICENSE_1_0.txt
*/
#include <stdint.h>
#include <stdexcept>
namespace static_any
{
namespace anyimpl
{
struct bad_any_cast
{
};
struct bad_any_cast
{
};
struct empty_any
{
};
struct empty_any
{
};
struct base_any_policy
{
virtual void static_delete(void** x) = 0;
virtual void copy_from_value(void const* src, void** dest) = 0;
virtual void clone(void* const* src, void** dest) = 0;
virtual void move(void* const* src, void** dest) = 0;
virtual void* get_value(void** src) = 0;
virtual size_t get_size() = 0;
};
struct base_any_policy
{
virtual void static_delete(void** x) = 0;
virtual void copy_from_value(void const* src, void** dest) = 0;
virtual void clone(void* const* src, void** dest) = 0;
virtual void move(void* const* src, void** dest) = 0;
virtual void* get_value(void** src) = 0;
virtual size_t get_size() = 0;
};
template<typename T>
struct typed_base_any_policy : base_any_policy
{
virtual size_t get_size()
{
return sizeof(T);
}
};
template<typename T>
struct typed_base_any_policy : base_any_policy
{
virtual size_t get_size() { return sizeof(T); }
};
template<typename T>
struct small_any_policy : typed_base_any_policy<T>
{
virtual void static_delete(void** x)
{
}
virtual void copy_from_value(void const* src, void** dest)
{
new(dest) T(*reinterpret_cast<T const*>(src));
}
virtual void clone(void* const* src, void** dest)
{
*dest = *src;
}
virtual void move(void* const* src, void** dest)
{
*dest = *src;
}
virtual void* get_value(void** src)
{
return reinterpret_cast<void*>(src);
}
};
template<typename T>
struct small_any_policy : typed_base_any_policy<T>
{
virtual void static_delete(void** x) { }
virtual void copy_from_value(void const* src, void** dest)
{ new(dest) T(*reinterpret_cast<T const*>(src)); }
virtual void clone(void* const* src, void** dest) { *dest = *src; }
virtual void move(void* const* src, void** dest) { *dest = *src; }
virtual void* get_value(void** src) { return reinterpret_cast<void*>(src); }
};
template<typename T>
struct big_any_policy : typed_base_any_policy<T>
{
virtual void static_delete(void** x)
template<typename T>
struct big_any_policy : typed_base_any_policy<T>
{
virtual void static_delete(void** x)
{
if (*x)
delete(*reinterpret_cast<T**>(x));
delete(*reinterpret_cast<T**>(x));
*x = NULL;
}
virtual void copy_from_value(void const* src, void** dest)
virtual void copy_from_value(void const* src, void** dest)
{
*dest = new T(*reinterpret_cast<T const*>(src));
*dest = new T(*reinterpret_cast<T const*>(src));
}
virtual void clone(void* const* src, void** dest)
virtual void clone(void* const* src, void** dest)
{
*dest = new T(**reinterpret_cast<T* const*>(src));
*dest = new T(**reinterpret_cast<T* const*>(src));
}
virtual void move(void* const* src, void** dest)
virtual void move(void* const* src, void** dest)
{
(*reinterpret_cast<T**>(dest))->~T();
**reinterpret_cast<T**>(dest) = **reinterpret_cast<T* const*>(src);
(*reinterpret_cast<T**>(dest))->~T();
**reinterpret_cast<T**>(dest) = **reinterpret_cast<T* const*>(src);
}
virtual void* get_value(void** src) { return *src; }
};
virtual void* get_value(void** src)
{
return *src;
}
};
template<typename T>
struct choose_policy
{
typedef big_any_policy<T> type;
};
template<typename T>
struct choose_policy
{
typedef big_any_policy<T> type;
};
template<typename T>
struct choose_policy<T*>
{
typedef small_any_policy<T*> type;
};
template<typename T>
struct choose_policy<T*>
{
typedef small_any_policy<T*> type;
};
struct any;
struct any;
/// Choosing the policy for an any type is illegal, but should never happen.
/// This is designed to throw a compiler error.
template<>
struct choose_policy<any>
{
typedef void type;
};
/// Choosing the policy for an any type is illegal, but should never happen.
/// This is designed to throw a compiler error.
template<>
struct choose_policy<any>
{
typedef void type;
};
/// Specializations for small types.
#define SMALL_POLICY(TYPE) template<> struct \
choose_policy<TYPE> { typedef small_any_policy<TYPE> type; };
/// Specializations for small types.
#define SMALL_POLICY(TYPE) template<> struct \
choose_policy<TYPE> { typedef small_any_policy<TYPE> type; };
SMALL_POLICY(char);
SMALL_POLICY(signed char);
SMALL_POLICY(unsigned char);
SMALL_POLICY(signed short);
SMALL_POLICY(unsigned short);
SMALL_POLICY(signed int);
SMALL_POLICY(unsigned int);
SMALL_POLICY(signed long);
SMALL_POLICY(unsigned long);
SMALL_POLICY(signed long long);
SMALL_POLICY(unsigned long long);
SMALL_POLICY(float);
SMALL_POLICY(double);
SMALL_POLICY(bool);
SMALL_POLICY(char);
SMALL_POLICY(signed char);
SMALL_POLICY(unsigned char);
SMALL_POLICY(signed short);
SMALL_POLICY(unsigned short);
SMALL_POLICY(signed int);
SMALL_POLICY(unsigned int);
SMALL_POLICY(signed long);
SMALL_POLICY(unsigned long);
SMALL_POLICY(signed long long);
SMALL_POLICY(unsigned long long);
SMALL_POLICY(float);
SMALL_POLICY(double);
SMALL_POLICY(bool);
#undef SMALL_POLICY
#undef SMALL_POLICY
/// This function will return a different policy for each type.
template<typename T>
base_any_policy* get_policy()
{
static typename choose_policy<T>::type policy;
return &policy;
};
/// This function will return a different policy for each type.
template<typename T>
base_any_policy* get_policy()
{
static typename choose_policy<T>::type policy;
return &policy;
};
}
class any
@ -139,37 +158,40 @@ public:
/// Initializing constructor.
template <typename T>
any(const T& x)
: policy(anyimpl::get_policy<anyimpl::empty_any>()), object(NULL)
: policy(anyimpl::get_policy<anyimpl::empty_any>()), object(NULL)
{
assign(x);
}
/// Empty constructor.
any()
: policy(anyimpl::get_policy<anyimpl::empty_any>()), object(NULL)
{ }
: policy(anyimpl::get_policy<anyimpl::empty_any>()), object(NULL)
{
}
/// Special initializing constructor for string literals.
any(const char* x)
: policy(anyimpl::get_policy<anyimpl::empty_any>()), object(NULL)
{
: policy(anyimpl::get_policy<anyimpl::empty_any>()), object(NULL)
{
assign(x);
}
/// Copy constructor.
any(const any& x)
: policy(anyimpl::get_policy<anyimpl::empty_any>()), object(NULL)
{
: policy(anyimpl::get_policy<anyimpl::empty_any>()), object(NULL)
{
assign(x);
}
/// Destructor.
~any() {
~any()
{
policy->static_delete(&object);
}
/// Assignment function from another any.
any& assign(const any& x) {
any& assign(const any& x)
{
reset();
policy = x.policy;
policy->clone(&x.object, &object);
@ -178,7 +200,8 @@ public:
/// Assignment function.
template <typename T>
any& assign(const T& x) {
any& assign(const T& x)
{
reset();
policy = anyimpl::get_policy<T>();
policy->copy_from_value(&x, &object);
@ -197,8 +220,42 @@ public:
return assign(x);
}
/// Less than operator for sorting
bool operator<(const any& x) const
{
if (policy == x.policy)
{
void* p1 = const_cast<void*>(object);
void* p2 = const_cast<void*>(x.object);
return memcmp(policy->get_value(&p1),
x.policy->get_value(&p2),
policy->get_size()) < 0 ? 1 : 0;
}
return 0;
}
/// equal operator
bool operator==(const any& x) const
{
if (policy == x.policy)
{
void* p1 = const_cast<void*>(object);
void* p2 = const_cast<void*>(x.object);
return memcmp(policy->get_value(&p1),
x.policy->get_value(&p2),
policy->get_size()) == 0 ? 1 : 0;
}
return 0;
}
/// Utility functions
any& swap(any& x) {
uint8_t getHash() const
{
void* p1 = const_cast<void*>(object);
return *(uint64_t*)policy->get_value(&p1) % 4048;
}
any& swap(any& x)
{
std::swap(policy, x.policy);
std::swap(object, x.object);
return *this;
@ -206,27 +263,32 @@ public:
/// Cast operator. You can only cast to the original type.
template<typename T>
T& cast() {
if (policy != anyimpl::get_policy<T>())
T& cast()
{
if (policy != anyimpl::get_policy<T>())
throw anyimpl::bad_any_cast();
T* r = reinterpret_cast<T*>(policy->get_value(&object));
return *r;
}
/// Returns true if the any contains no value.
bool empty() const {
bool empty() const
{
return policy == anyimpl::get_policy<anyimpl::empty_any>();
}
/// Frees any allocated memory, and sets the value to NULL.
void reset() {
void reset()
{
policy->static_delete(&object);
policy = anyimpl::get_policy<anyimpl::empty_any>();
}
/// Returns true if the two types are the same.
bool compatible(const any& x) const {
bool compatible(const any& x) const
{
return policy == x.policy;
}
};
}