deallocate_global-2.cc

Mac OS X 10.4.9 for x86 Source Code gcc 实现源代码

//
// Copyright (C) 2004 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.

// 20.4.1.1 allocator members

#include <list>
#include <string>
#include <stdexcept>
#include <ext/mt_allocator.h>
#include <testsuite_hooks.h>

static size_t count;

struct count_check
{
  count_check() {}
  ~count_check()
  {
    if (count != 0)
      {
	// NB: __mt_allocator doesn't clean itself up. Thus, this will
	// not be zero.
      }
  }
};
 
// First.
static count_check check;

void* operator new(size_t size) throw(std::bad_alloc)
{
  printf("operator new is called \n");
  void* p = malloc(size);
  if (p == NULL)
    throw std::bad_alloc();
  count++;
  return p;
}
 
void operator delete(void* p) throw()
{
  printf("operator delete is called \n");
  if (p == NULL)
    return;
  count--;
  if (count == 0)
    printf("All memory released \n");
  else
    printf("%u allocations to be released \n", count);
  free(p);
}

typedef std::string value_type;
using __gnu_cxx::__pool;
using __gnu_cxx::__common_pool_policy;
typedef __common_pool_policy<__pool, false> policy_type;
typedef __gnu_cxx::__mt_alloc<value_type, policy_type> allocator_type;
typedef std::char_traits<value_type> traits_type;
typedef std::list<value_type, allocator_type> list_type;

// Second.
list_type l;

int main()
{
  l.push_back("bayou bend");
  return 0;
}