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// -*-c++-*-
/* $Id: arena.h,v 1.5 1998/11/23 02:26:20 dm Exp $ */
/*
*
* Copyright (C) 1998 David Mazieres (dm@uun.org)
*
* This program 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 program 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 program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA
*
*/
#ifndef _ASYNC_ARENA_H_
#define _ASYNC_ARENA_H_ 1
#include "async.h"
class arena {
u_int size;
u_int avail;
char *chunk;
char *cur;
void newchunk (size_t);
public:
arena () {
size = avail = 0;
chunk = cur = 0;
}
void *alloc (size_t bytes, size_t align = sizeof (double)) {
int pad = (align - (chunk - (char *) 0)) % align;
if (avail + pad < bytes) {
newchunk (bytes + align);
pad = (align - (chunk - (char *) 0)) % align;
}
void *ret = cur + pad;
cur += bytes + pad;
avail -= bytes + pad;
return ret;
}
char *(strdup) (const char *str)
{ return strcpy ((char *) alloc (1 + strlen (str), 1), str); }
#ifdef DMALLOC
char *_strdup_leap (const char *, int, const char *str)
{ return strcpy ((char *) alloc (1 + strlen (str), 1), str); }
#endif /* DMALLOC */
~arena ();
};
inline void *
operator new (size_t n, arena &a)
{
return a.alloc (n);
}
#endif /* !_ASYNC_ARENA_H_ */
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