# bson_realloc_func

## Synopsis

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

## Parameters

mem | A memory region.
num_bytes | A size_t containing the requested size.
ctx | A consumer-specific pointer or NULL.

## Description

This is a prototype for pluggable realloc functions used through the Libbson library. If you wish to use a custom allocator this is one way to do it. Additionally, bson_realloc_ctx() is a default implementation of this prototype.