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/**
* @file allocator.h
*
* Header file for the allocator object
*
* Copyright (C) 2000 by Mike Perry.
* Distributed WITHOUT WARRANTY under the GPL. See COPYING for details.
*/
#ifndef __NJ_LIB_ALLOCATOR_H__
#define __NJ_LIB_ALLOCATOR_H__
#include <lib/memory_pool.h>
#include <lib/entry_pool.h>
#include <lib/util.h>
#include <config.h>
/**@{ @name Allocator bootstrap types
*
* Used before the allocator enters main and we know what type of allocation
* the user wants.
*
* Do NOT change these defaults.. We need them set this way
* to determine when the user's environment prefs took over in the
* allocator.
*/
#define NJ_ALLOCATOR_BOOTSTRAP_ALLOC_TYPE NJ_PROT_OVER
#define NJ_ALLOCATOR_BOOTSTRAP_FREE_TYPE NJ_CHK_FREE_SEGV
/*@}*/
/**
* Determine if chunk is between the first system allocation and the last one
*
* If yes, we used the bootstrap allocator
*/
#define NJ_ALLOCATOR_CHUNK_FROM_BOOTSTRAP(allocator, chunk) \
((allocator)->first_sys_alloc <= (chunk) && (chunk) < (allocator)->last_sys_alloc)
/** allocator object */
struct nj_allocator
{
struct nj_memory_pool mem_pool; /**< The memory source */
struct nj_entry_pool entry_pool; /**< The heap entry pool */
int fixed_alloc;/**< Are all allocs of the same type?*/
nj_addr_t first_sys_alloc; /**< The first system allocation, used to keep track of the bootstrap alloc */
nj_addr_t last_sys_alloc; /**< The last allocation before main */
void *(*libc_realloc)(void *,size_t); /**< Symbol for the libc reallocator */
};
/**@{ @name Error types during discovery */
#define NJ_ALLOCATOR_ERROR_NONE (1<<0)
#define NJ_ALLOCATOR_ERROR_WEIRD (1<<1)
#define NJ_ALLOCATOR_ERROR_OVERFLOW (1<<2)
#define NJ_ALLOCATOR_ERROR_UNDERFLOW (1<<3)
#define NJ_ALLOCATOR_ERROR_BAD_PTR (1<<4)
#define NJ_ALLOCATOR_ERROR_DOUBLE_FREE (1<<5)
/*@}*/
#define NJ_ALLOCATOR_BLOCK_UNKNOWN ((nj_addr_t)-1)
void __nj_allocator_bootstrap_init(struct nj_allocator *);
void __nj_allocator_user_init(struct nj_allocator *, struct nj_libc_syms *, struct nj_prefs *);
void __nj_allocator_fini(struct nj_allocator *);
const char *__nj_allocator_type_to_string(int);
nj_addr_t __nj_allocator_request_user_chunk(struct nj_allocator *, size_t, struct nj_dynamic_prefs);
nj_addr_t __nj_allocator_resize_user_chunk(struct nj_allocator *, nj_addr_t, size_t, struct nj_dynamic_prefs);
void __nj_allocator_release_user_chunk(struct nj_allocator *, nj_addr_t, struct nj_dynamic_prefs);
#endif /* allocator.h */
// vim:ts=4
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