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// Boost.Function library
// Copyright Douglas Gregor 2001-2003. Use, modification and
// distribution is subject to the Boost Software License, Version
// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
// For more information, see http://www.boost.org
#include <boost/function.hpp>
#include <boost/core/lightweight_test.hpp>
#include <cassert>
#include <functional>
using namespace std;
using namespace boost;
static int alloc_count = 0;
static int dealloc_count = 0;
template<typename T>
struct counting_allocator : public std::allocator<T>
{
template<typename U>
struct rebind
{
typedef counting_allocator<U> other;
};
counting_allocator()
{
}
template<typename U>
counting_allocator( counting_allocator<U> )
{
}
T* allocate(std::size_t n)
{
alloc_count++;
return std::allocator<T>::allocate(n);
}
void deallocate(T* p, std::size_t n)
{
dealloc_count++;
std::allocator<T>::deallocate(p, n);
}
};
struct enable_small_object_optimization
{
};
struct disable_small_object_optimization
{
int unused_state_data[32];
};
template <typename base>
struct plus_int: base
{
int operator()(int x, int y) const { return x + y; }
};
static int do_minus(int x, int y) { return x-y; }
template <typename base>
struct DoNothing: base
{
void operator()() const {}
};
static void do_nothing() {}
int main()
{
function2<int, int, int> f;
f.assign( plus_int<disable_small_object_optimization>(), counting_allocator<int>() );
f.clear();
BOOST_TEST_EQ( alloc_count, 1 );
BOOST_TEST_EQ( dealloc_count, 1 );
alloc_count = 0;
dealloc_count = 0;
f.assign( plus_int<enable_small_object_optimization>(), counting_allocator<int>() );
f.clear();
BOOST_TEST_EQ( alloc_count, 0 );
BOOST_TEST_EQ( dealloc_count, 0 );
f.assign( plus_int<disable_small_object_optimization>(), std::allocator<int>() );
f.clear();
f.assign( plus_int<enable_small_object_optimization>(), std::allocator<int>() );
f.clear();
alloc_count = 0;
dealloc_count = 0;
f.assign( &do_minus, counting_allocator<int>() );
f.clear();
BOOST_TEST_EQ( alloc_count, 0 );
BOOST_TEST_EQ( dealloc_count, 0 );
f.assign( &do_minus, std::allocator<int>() );
f.clear();
function0<void> fv;
alloc_count = 0;
dealloc_count = 0;
fv.assign( DoNothing<disable_small_object_optimization>(), counting_allocator<int>() );
fv.clear();
BOOST_TEST_EQ( alloc_count, 1 );
BOOST_TEST_EQ( dealloc_count, 1 );
alloc_count = 0;
dealloc_count = 0;
fv.assign( DoNothing<enable_small_object_optimization>(), counting_allocator<int>() );
fv.clear();
BOOST_TEST_EQ( alloc_count, 0 );
BOOST_TEST_EQ( dealloc_count, 0 );
fv.assign( DoNothing<disable_small_object_optimization>(), std::allocator<int>() );
fv.clear();
fv.assign( DoNothing<enable_small_object_optimization>(), std::allocator<int>() );
fv.clear();
alloc_count = 0;
dealloc_count = 0;
fv.assign( &do_nothing, counting_allocator<int>() );
fv.clear();
BOOST_TEST_EQ( alloc_count, 0 );
BOOST_TEST_EQ( dealloc_count, 0 );
fv.assign( &do_nothing, std::allocator<int>() );
fv.clear();
function0<void> fv2;
fv.assign(&do_nothing, std::allocator<int>() );
fv2.assign(fv, std::allocator<int>() );
return boost::report_errors();
}
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