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////////////////////////////////////////////////////////////////////////////////////////////////////
// \file arena_allocator.cpp : implementation of arena allocation schema
//
// Afftar: Reuven Bass - inspired by Mamasha Knows
////////////////////////////////////////////////////////////////////////////////////////////////////
#include "StdAfx.h"
#include "arena_allocator.h"
////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////////////////////////
namespace unitest {
/**/
void arena_simple_usage()
{
struct SomeSt {
double d;
int i;
SomeSt() {;}
SomeSt(double, int) {;}
};
Arena arena;
SomeSt* p1 = new (arena) SomeSt[20];
double* darr = new (arena) double[4000];
arena.DTOR(p1, 20);
SomeSt* p4 = new (arena) SomeSt[10];
SomeSt* p5 = new (arena) SomeSt(10., 30);
for (int i = 10000; i-- > 0; )
arena.DTOR(new (arena) SomeSt);
arena.DTOR(p4, 10);
arena.DTOR(p5);
}
/**/
void my_arena_usage()
{
struct SomeSt {
double d;
int i;
SomeSt() {;}
SomeSt(double, int) {;}
~SomeSt() { printf("SomeSt::DTOR() %d\n", i); }
};
MyArena<256> arena;
SomeSt* p4 = new (arena) SomeSt[3];
SomeSt* p5 = new (arena) SomeSt(10., 30);
p4[0].i = 10;
p4[1].i = 20;
p4[2].i = 30;
p5->i = 500;
arena.DTOR(p4, 3);
arena.DTOR(p5);
arena.clear();
int st_size = sizeof(SomeSt);
p4 = new (arena) SomeSt[3];
p5 = new (arena) SomeSt(10., 30);
p4[0].i = 10;
p4[1].i = 20;
p4[2].i = 30;
p5->i = 500;
arena.DTOR(p4, 3);
arena.DTOR(p5);
}
using namespace boost::intrusive;
class MyStruct
: public slist_base_hook<>
{
public:
int indx_;
};
typedef slist<MyStruct> AList;
/**/
void slist_usecase()
{
AList l1;
AList l2;
MyStruct* p = new MyStruct[3];
p[0].indx_ = 0;
p[1].indx_ = 1;
p[2].indx_ = 2;
// l1.push_back(p[0]);
// l1.push_back(p[1]);
// l1.push_back(p[2]);
l2.push_front(p[0]);
l2.push_front(p[1]);
l2.push_front(p[2]);
for ( AList::iterator it(l2.begin()), end(l2.end()); it != end; ++it )
printf("%d\n", it->indx_);
return;
}
/**/
void arena_usecases()
{
arena_simple_usage();
my_arena_usage();
return;
return;
slist_usecase();
return;
}
} // namespace unitest
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My real name is Reuven Bass. My first article here was published under the Mamasha Knows pseudonym. It worked. So, I stay with Mamasha for a while. (If it works - do not touch it)
Programming became my life from thirteen. I love coding. I love beauty. I always try to combine coding and beauty.
RB