/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2002-2009. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
#ifndef ERL_MSEG_H_
#define ERL_MSEG_H_
#include "sys.h"
#include "erl_alloc_types.h"
#ifndef HAVE_MMAP
# define HAVE_MMAP 0
#endif
#ifndef HAVE_MREMAP
# define HAVE_MREMAP 0
#endif
#if HAVE_MMAP
# define HAVE_ERTS_MSEG 1
#else
# define HAVE_ERTS_MSEG 0
#endif
#if HAVE_ERTS_MSEG
#define ERTS_MSEG_VSN_STR "0.9"
typedef struct {
Uint amcbf;
Uint rmcbf;
Uint mcs;
Uint cci;
} ErtsMsegInit_t;
#define ERTS_MSEG_INIT_DEFAULT_INITIALIZER \
{ \
4*1024*1024, /* amcbf: Absolute max cache bad fit */ \
20, /* rmcbf: Relative max cache bad fit */ \
5, /* mcs: Max cache size */ \
1000 /* cci: Cache check interval */ \
}
typedef struct {
int cache;
int preserv;
Uint abs_shrink_th;
Uint rel_shrink_th;
} ErtsMsegOpt_t;
#define ERTS_MSEG_DEFAULT_OPT_INITIALIZER \
{ \
1, /* Use cache */ \
1, /* Preserv data */ \
0, /* Absolute shrink threshold */ \
0 /* Relative shrink threshold */ \
}
void *erts_mseg_alloc(ErtsAlcType_t, Uint *);
void *erts_mseg_alloc_opt(ErtsAlcType_t, Uint *, const ErtsMsegOpt_t *);
void erts_mseg_dealloc(ErtsAlcType_t, void *, Uint);
void erts_mseg_dealloc_opt(ErtsAlcType_t, void *, Uint, const ErtsMsegOpt_t *);
void *erts_mseg_realloc(ErtsAlcType_t, void *, Uint, Uint *);
void *erts_mseg_realloc_opt(ErtsAlcType_t, void *, Uint, Uint *,
const ErtsMsegOpt_t *);
void erts_mseg_clear_cache(void);
Uint erts_mseg_no(void);
Uint erts_mseg_unit_size(void);
void erts_mseg_init(ErtsMsegInit_t *init);
void erts_mseg_late_init(void); /* Have to be called after all allocators,
threads and timers have been initialized. */
void erts_mseg_exit(void);
Eterm erts_mseg_info_options(int *, void*, Uint **, Uint *);
Eterm erts_mseg_info(int *, void*, int, Uint **, Uint *);
#endif /* #if HAVE_ERTS_MSEG */
unsigned long erts_mseg_test(unsigned long,
unsigned long,
unsigned long,
unsigned long);
#endif /* #ifndef ERL_MSEG_H_ */
