1 /*

     2 ** $Id: lmem.h,v 1.31.1.1 2007/12/27 13:02:25 roberto Exp $

     3 ** Interface to Memory Manager

     4 ** See Copyright Notice in lua.h

     5 */

     6 

     7 #ifndef lmem_h

     8 #define lmem_h

     9 

    10 

    11 #include <stddef.h>

    12 

    13 #include "llimits.h"

    14 #include "lua.h"

    15 

    16 #define MEMERRMSG	"not enough memory"

    17 

    18 

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

    20 	((cast(size_t, (n)+1) <= MAX_SIZET/(e)) ?  /* +1 to avoid warnings */ \

    21 		luaM_realloc_(L, (b), (on)*(e), (n)*(e)) : \

    22 		luaM_toobig(L))

    23 

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

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

    26 #define luaM_freearray(L, b, n, t)   luaM_reallocv(L, (b), n, 0, sizeof(t))

    27 

    28 #define luaM_malloc(L,t)	luaM_realloc_(L, NULL, 0, (t))

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

    30 #define luaM_newvector(L,n,t) \

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

    32 

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

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

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

    36 

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

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

    39 

    40 

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

    42                                                           size_t size);

    43 LUAI_FUNC void *luaM_toobig (lua_State *L);

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

    45                                size_t size_elem, int limit,

    46                                const char *errormsg);

    47 

    48 #endif

    49