STXXL (GIT-copy)

#include <iostream>
#include <malloc.h>
#include <stdlib.h>
#include "../common/utils.h"

using namespace std;



void print_malloc_stats()
{
	struct mallinfo info = mallinfo();
	STXXL_MSG("MALLOC statistics BEGIN")
	STXXL_MSG("===============================================================")
	STXXL_MSG("non-mmapped space allocated from system (bytes): "<<info.arena)
	STXXL_MSG("number of free chunks                          : "<<info.ordblks)
	STXXL_MSG("number of fastbin blocks                       : "<<info.smblks)
	STXXL_MSG("number of chunks allocated via mmap()          : "<<info.hblks)
	STXXL_MSG("total number of bytes allocated via mmap()     : "<<info.hblkhd)
	STXXL_MSG("maximum total allocated space (bytes)          : "<<info.usmblks)
	STXXL_MSG("space available in freed fastbin blocks (bytes): "<<info.fsmblks)
	STXXL_MSG("number of bytes allocated and in use           : "<<info.uordblks)
	STXXL_MSG("number of bytes allocated but not in use       : "<<info.fordblks)
	STXXL_MSG("top-most, releasable (via malloc_trim) space   : "<<info.keepcost)
	STXXL_MSG("================================================================")
};

int main(int argc, char * argv[])
{
	if(argc < 2)
	{
		cerr << "Usage: "<<argv[0]<<" bytes_to_allocate"<<endl;
		return -1;
	}
	sbrk(128*1024*1024);
	cout << "Nothing allocated" << endl;
	print_malloc_stats();
	char tmp;
	cin >> tmp;
	const unsigned bytes = atoi(argv[1]);
	char * ptr = new char[bytes];
	cout << "Allocated " << bytes << " bytes" << endl;
	print_malloc_stats();
	delete [] ptr;
	cout << "Deallocated " << endl;
	print_malloc_stats();
};