misc/liblua/lmem.c
author Wuzzy <Wuzzy2@mail.ru>
Mon, 13 Nov 2017 22:14:45 +0100
changeset 12836 8610462e3d33
parent 10017 de822cd3df3a
permissions -rw-r--r--
Remove 2 unused number tags in Construction Mode GUI These numbers are shown aside the power tag, but the numbers never change. They don't serve any purpose and are just visual clutter and annoying, since they partially overlap. They are probably a leftover from copying code over from other scripts. With this changeset, only the power and turn time are left visible, as it is supposed to.

/*
** $Id: lmem.c,v 1.70.1.1 2007/12/27 13:02:25 roberto Exp $
** Interface to Memory Manager
** See Copyright Notice in lua.h
*/


#include <stddef.h>

#define lmem_c
#define LUA_CORE

#include "lua.h"

#include "ldebug.h"
#include "ldo.h"
#include "lmem.h"
#include "lobject.h"
#include "lstate.h"



/*
** About the realloc function:
** void * frealloc (void *ud, void *ptr, size_t osize, size_t nsize);
** (`osize' is the old size, `nsize' is the new size)
**
** Lua ensures that (ptr == NULL) iff (osize == 0).
**
** * frealloc(ud, NULL, 0, x) creates a new block of size `x'
**
** * frealloc(ud, p, x, 0) frees the block `p'
** (in this specific case, frealloc must return NULL).
** particularly, frealloc(ud, NULL, 0, 0) does nothing
** (which is equivalent to free(NULL) in ANSI C)
**
** frealloc returns NULL if it cannot create or reallocate the area
** (any reallocation to an equal or smaller size cannot fail!)
*/



#define MINSIZEARRAY    4


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


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



/*
** generic allocation routine.
*/
void *luaM_realloc_ (lua_State *L, void *block, size_t osize, size_t nsize) {
  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;
}