/*
 * Copyright 2013 MongoDB, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


#ifndef BSON_MEMORY_H
#define BSON_MEMORY_H


#if !defined (BSON_INSIDE) && !defined (BSON_COMPILATION)
# error "Only <bson.h> can be included directly."
#endif


#include "bson-macros.h"
#include "bson-types.h"


BSON_BEGIN_DECLS


typedef void *(*bson_realloc_func) (void  *mem,
                                    size_t num_bytes,
                                    void  *ctx);


typedef struct _bson_mem_vtable_t
{
   void *(*malloc)    (size_t  num_bytes);
   void *(*calloc)    (size_t  n_members,
                       size_t  num_bytes);
   void *(*realloc)   (void   *mem,
                       size_t  num_bytes);
   void  (*free)      (void   *mem);
   void *padding [4];
} bson_mem_vtable_t;


BSON_API
void  bson_mem_set_vtable (const bson_mem_vtable_t *vtable);
BSON_API
void  bson_mem_restore_vtable (void);
BSON_API
void *bson_malloc         (size_t  num_bytes);
BSON_API
void *bson_malloc0        (size_t  num_bytes);
BSON_API
void *bson_realloc        (void   *mem,
                           size_t  num_bytes);
BSON_API
void *bson_realloc_ctx    (void   *mem,
                           size_t  num_bytes,
                           void   *ctx);
BSON_API
void  bson_free           (void   *mem);
BSON_API
void  bson_zero_free      (void   *mem,
                           size_t  size);


BSON_END_DECLS


#endif /* BSON_MEMORY_H */
