/*

** $Id: lmem.h,v 1.40.1.1 2013/04/12 18:48:47 roberto Exp $

** Interface to Memory Manager

** See Copyright Notice in lua.h

*/

#ifndef lmem_h

#define lmem_h

#include <stddef.h>

#include "llimits.h"

#include "lua.h"

/*

** This macro avoids the runtime division MAX_SIZET/(e), as 'e' is

** always constant.

** The macro is somewhat complex to avoid warnings:

** +1 avoids warnings of "comparison has constant result";

** cast to 'void' avoids warnings of "value unused".

*/

#define luaM_reallocv(L,b,on,n,e) \

(cast(void, \

(cast(size_t, (n)+1) > MAX_SIZET/(e)) ? (luaM_toobig(L), 0) : 0), \

luaM_realloc_(L, (b), (on)*(e), (n)*(e)))

#define luaM_freemem(L, b, s) luaM_realloc_(L, (b), (s), 0)

#define luaM_free(L, b) luaM_realloc_(L, (b), sizeof(*(b)), 0)

#define luaM_freearray(L, b, n) luaM_reallocv(L, (b), n, 0, sizeof((b)[0]))

#define luaM_malloc(L,s) luaM_realloc_(L, NULL, 0, (s))

#define luaM_new(L,t) cast(t *, luaM_malloc(L, sizeof(t)))

#define luaM_newvector(L,n,t) \

cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t)))

#define luaM_newobject(L,tag,s) luaM_realloc_(L, NULL, tag, (s))

#define luaM_growvector(L,v,nelems,size,t,limit,e) \

if ((nelems)+1 > (size)) \

((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e)))

#define luaM_reallocvector(L, v,oldn,n,t) \

((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))

LUAI_FUNC l_noret luaM_toobig (lua_State *L);

/* not to be called directly */

LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,

size_t size);

LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size,

size_t size_elem, int limit,

const char *what);

#endif