lmem.h File Reference

#include <stddef.h>
#include "llimits.h"
#include "lua.h"

Go to the source code of this file.

Macros
#define	luaM_reallocv(L, b, on, n, e)
#define	luaM_reallocvchar(L, b, on, n)    cast(char *, luaM_realloc_(L, (b), (on)*sizeof(char), (n)*sizeof(char)))
#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_realloc_(L, (b), (n)*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)
#define	luaM_reallocvector(L, v, oldn, n, t)    ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))

Functions
LUAI_FUNC l_noret	luaM_toobig (lua_State *L)
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)

Macro Definition Documentation

luaM_free

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

Definition at line 42 of file lua-5.3.6/src/lmem.h.

luaM_freearray

#define luaM_freearray	(		L,
			b,
			n )   luaM_realloc_(L, (b), (n)*sizeof(*(b)), 0)

Definition at line 43 of file lua-5.3.6/src/lmem.h.

luaM_freemem

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

Definition at line 41 of file lua-5.3.6/src/lmem.h.

luaM_growvector

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

Value:

          if ((nelems)+1 > (size)) \
            ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e)))

Definition at line 52 of file lua-5.3.6/src/lmem.h.

#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)))

luaM_malloc

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

Definition at line 45 of file lua-5.3.6/src/lmem.h.

luaM_new

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

Definition at line 46 of file lua-5.3.6/src/lmem.h.

luaM_newobject

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

Definition at line 50 of file lua-5.3.6/src/lmem.h.

luaM_newvector

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

Definition at line 47 of file lua-5.3.6/src/lmem.h.

#define luaM_newvector(L,n,t) \
        cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t)))

luaM_reallocv

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

Value:

  (((sizeof(n) >= sizeof(size_t) && cast(size_t, (n)) + 1 > MAX_SIZET/(e)) \
      ? luaM_toobig(L) : cast_void(0)) , \
   luaM_realloc_(L, (b), (on)*(e), (n)*(e)))

Definition at line 30 of file lua-5.3.6/src/lmem.h.

#define luaM_reallocv(L,b,on,n,e) \
  (((sizeof(n) >= sizeof(size_t) && cast(size_t, (n)) + 1 > MAX_SIZET/(e)) \
      ? luaM_toobig(L) : cast_void(0)) , \
   luaM_realloc_(L, (b), (on)*(e), (n)*(e)))

luaM_reallocvchar

#define luaM_reallocvchar	(		L,
			b,
			on,
			n )    cast(char *, luaM_realloc_(L, (b), (on)*sizeof(char), (n)*sizeof(char)))

Definition at line 38 of file lua-5.3.6/src/lmem.h.

#define luaM_reallocvchar(L,b,on,n)  \
    cast(char *, luaM_realloc_(L, (b), (on)*sizeof(char), (n)*sizeof(char)))

luaM_reallocvector

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

Definition at line 56 of file lua-5.3.6/src/lmem.h.

#define luaM_reallocvector(L, v,oldn,n,t) \
   ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))

Function Documentation

luaM_growaux_()

LUAI_FUNC void * luaM_growaux_	(	lua_State *	L,
		void *	block,
		int *	size,
		size_t	size_elem,
		int	limit,
		const char *	what )

Definition at line 46 of file lua-5.1.5/src/lmem.c.

                                                      {
  void *newblock;
  int newsize;
  if (*size >= limit/2) {  /* cannot double it? */
    if (*size >= limit)  /* cannot grow even a little? */
      luaG_runerror(L, errormsg);
    newsize = limit;  /* still have at least one free place */
  }
  else {
    newsize = (*size)*2;
    if (newsize < MINSIZEARRAY)
      newsize = MINSIZEARRAY;  /* minimum size */
  }
  newblock = luaM_reallocv(L, block, *size, newsize, size_elems);
  *size = newsize;  /* update only when everything else is OK */
  return newblock;
}

References block(), luaG_runerror(), luaM_reallocv, and MINSIZEARRAY.

luaM_realloc_()

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

Definition at line 76 of file lua-5.1.5/src/lmem.c.

                                                                            {
  global_State *g = G(L);
  lua_assert((osize == 0) == (block == NULL));
  block = (*g->frealloc)(g->ud, block, osize, nsize);
  if (block == NULL && nsize > 0)
    luaD_throw(L, LUA_ERRMEM);
  lua_assert((nsize == 0) == (block == NULL));
  g->totalbytes = (g->totalbytes - osize) + nsize;
  return block;
}

luaM_toobig()

LUAI_FUNC l_noret luaM_toobig

(

lua_State *

L

)

Definition at line 66 of file lua-5.1.5/src/lmem.c.

                                 {
  luaG_runerror(L, "memory allocation error: block too big");
  return NULL;  /* to avoid warnings */
}