1/* BEGIN CSTYLED */
2/*
3** $Id: lmem.h,v 1.40.1.1 2013/04/12 18:48:47 roberto Exp $
4** Interface to Memory Manager
5** See Copyright Notice in lua.h
6*/
7
8#ifndef lmem_h
9#define lmem_h
10
11
12#include "llimits.h"
13#include <sys/lua/lua.h>
14
15
16/*
17** This macro avoids the runtime division MAX_SIZET/(e), as 'e' is
18** always constant.
19** The macro is somewhat complex to avoid warnings:
20** +1 avoids warnings of "comparison has constant result";
21** cast to 'void' avoids warnings of "value unused".
22*/
23#define luaM_reallocv(L,b,on,n,e) \
24  (cast(void, \
25     (cast(size_t, (n)+1) > MAX_SIZET/(e)) ? (luaM_toobig(L), 0) : 0), \
26   luaM_realloc_(L, (b), (on)*(e), (n)*(e)))
27
28#define luaM_freemem(L, b, s)	luaM_realloc_(L, (b), (s), 0)
29#define luaM_free(L, b)		luaM_realloc_(L, (b), sizeof(*(b)), 0)
30#define luaM_freearray(L, b, n)   luaM_reallocv(L, (b), n, 0, sizeof((b)[0]))
31
32#define luaM_malloc(L,s)	luaM_realloc_(L, NULL, 0, (s))
33#define luaM_new(L,t)		cast(t *, luaM_malloc(L, sizeof(t)))
34#define luaM_newvector(L,n,t) \
35		cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t)))
36
37#define luaM_newobject(L,tag,s)	luaM_realloc_(L, NULL, tag, (s))
38
39#define luaM_growvector(L,v,nelems,size,t,limit,e) \
40          if ((nelems)+1 > (size)) \
41            ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e)))
42
43#define luaM_reallocvector(L, v,oldn,n,t) \
44   ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))
45
46LUAI_FUNC l_noret luaM_toobig (lua_State *L);
47
48/* not to be called directly */
49LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,
50                                                          size_t size);
51LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size,
52                               size_t size_elem, int limit,
53                               const char *what);
54
55#endif
56/* END CSTYLED */
57