lmem.c File Reference

#include <stddef.h>
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"

Go to the source code of this file.

Macros
#define	lmem_c
#define	LUA_CORE
#define	MINSIZEARRAY   4

Functions
void *	luaM_growaux_ (lua_State *L, void *block, int *size, size_t size_elems, int limit, const char *errormsg)
void *	luaM_toobig (lua_State *L)
void *	luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize)

Macro Definition Documentation

lmem_c

#define lmem_c

Definition at line 10 of file lua-5.1.5/src/lmem.c.

LUA_CORE

#define LUA_CORE

Definition at line 11 of file lua-5.1.5/src/lmem.c.

MINSIZEARRAY

#define MINSIZEARRAY   4

Definition at line 43 of file lua-5.1.5/src/lmem.c.

Referenced by luaM_growaux_().

Function Documentation

luaM_growaux_()

void * luaM_growaux_	(	lua_State *	L,
		void *	block,
		int *	size,
		size_t	size_elems,
		int	limit,
		const char *	errormsg )

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_()

void * luaM_realloc_	(	lua_State *	L,
		void *	block,
		size_t	osize,
		size_t	nsize )

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;
}

References block(), global_State::frealloc, G, lua_assert, LUA_ERRMEM, luaD_throw(), NULL, global_State::totalbytes, and global_State::ud.

luaM_toobig()

void * 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 */
}

References luaG_runerror(), and NULL.

Referenced by luaS_newlstr(), luaS_newudata(), luaS_newudata(), luaS_newudata(), and newlstr().