#ifndef SOURCE_DIRECTORY__TEST_INCLUDE_CDS_TEST_FC_HEAVY_VALUE_H_
#define SOURCE_DIRECTORY__TEST_INCLUDE_CDS_TEST_FC_HEAVY_VALUE_H_
-#include <math.h>
+#include <cmath>
#include <vector>
-namespace{
+namespace fc_test {
+
+ // SFINAE test
+ template <typename T>
+ class has_set_array_size {
+ typedef char select_small;
+ class select_big {
+ char dummy[2];
+ };
+
+ template <typename C, void (C::*) (size_t)> class selector
+ {};
+
+ template <typename C> static select_small test( selector<C, &C::set_array>* ) ;
+ template <typename C> static select_big test(...);
+
+ public:
+ static constexpr bool value = sizeof(test<T>(0)) == sizeof(char) ;
+ };
+
template<int DefaultSize = 10>
- struct HeavyValue {
+ struct heavy_value {
int value;
size_t nWriterNo;
static std::vector<int> pop_buff;
- static std::vector<int>::size_type buffer_size;
+ static size_t buffer_size;
- explicit HeavyValue(int new_value = 0)
+ explicit heavy_value(int new_value = 0)
: value(new_value),
nNo(0),
nWriterNo(0)
+ {};
+
+ heavy_value( heavy_value const& other)
+ : value(other.value)
+ , nNo(other.nNo)
+ , nWriterNo(other.nWriterNo)
{
- };
- HeavyValue(const HeavyValue &other)
- : value(other.value),
- nNo(other.nNo),
- nWriterNo(other.nWriterNo)
+ // This is an imitation of heavy copy ctor
+ for(size_t i = 0; i < buffer_size; ++i)
+ pop_buff[i] = static_cast<int>( std::sqrt( std::abs( static_cast<double>( pop_buff[i] ) * rand())));
+ }
+
+ void set_array(size_t new_size)
{
- for(decltype(buffer_size) i = 0; i < buffer_size; ++i)
- pop_buff[i] = static_cast<int>(std::sqrt(other.pop_buff[i]*rand()));
+ set_array_size(new_size);
}
- static void setArraySize(decltype(buffer_size) new_size){
+
+ static void set_array_size(size_t new_size)
+ {
+ if (buffer_size == new_size) return;
buffer_size = new_size;
pop_buff.resize(buffer_size, rand());
}
};
+
template<int DefaultSize>
- std::vector<int> HeavyValue< DefaultSize >::pop_buff(DefaultSize, rand());
+ std::vector<int> heavy_value< DefaultSize >::pop_buff(DefaultSize, rand());
template<int DefaultSize>
- std::vector<int>::size_type HeavyValue< DefaultSize >::buffer_size = DefaultSize;
+ std::vector<int>::size_type heavy_value< DefaultSize >::buffer_size = DefaultSize;
}
#endif /* SOURCE_DIRECTORY__TEST_INCLUDE_CDS_TEST_FC_HEVY_VALUE_H_ */