lmem.c File Reference

#include <stddef.h>
#include "lua.h"
#include "ldebug.h"
#include "ldo.h"
#include "lgc.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 *what)
l_noret	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-5.2.4/src/lmem.c.

LUA_CORE

#define LUA_CORE

Definition at line 11 of file lua-5.2.4/src/lmem.c.

MINSIZEARRAY

#define MINSIZEARRAY   4

Definition at line 43 of file lua-5.2.4/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 *	what )

Definition at line 46 of file lua-5.2.4/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, "too many %s (limit is %d)", what, limit);
    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 75 of file lua-5.2.4/src/lmem.c.

                                                                            {
  void *newblock;
  global_State *g = G(L);
  size_t realosize = (block) ? osize : 0;
  lua_assert((realosize == 0) == (block == NULL));
#if defined(HARDMEMTESTS)
  if (nsize > realosize && g->gcrunning)
    luaC_fullgc(L, 1);  /* force a GC whenever possible */
#endif
  newblock = (*g->frealloc)(g->ud, block, osize, nsize);
  if (newblock == NULL && nsize > 0) {
    api_check(L, nsize > realosize,
                 "realloc cannot fail when shrinking a block");
    if (g->gcrunning) {
      luaC_fullgc(L, 1);  /* try to free some memory... */
      newblock = (*g->frealloc)(g->ud, block, osize, nsize);  /* try again */
    }
    if (newblock == NULL)
      luaD_throw(L, LUA_ERRMEM);
  }
  lua_assert((nsize == 0) == (newblock == NULL));
  g->GCdebt = (g->GCdebt + nsize) - realosize;
  return newblock;
}

References api_check, block(), global_State::frealloc, G, global_State::GCdebt, global_State::gcrunning, lua_assert, LUA_ERRMEM, luaC_fullgc(), luaD_throw(), NULL, and global_State::ud.

luaM_toobig()

l_noret luaM_toobig

(

lua_State *

L

)

Definition at line 66 of file lua-5.2.4/src/lmem.c.

                                   {
  luaG_runerror(L, "memory allocation error: block too big");
}

References luaG_runerror().