lmem.h

   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 #if 0
  11 #include <stddef.h>
  12 #endif
  13
  14 #include "llimits.h"
  15 #include "lua.h"
  16
  17 #define MEMERRMSG       "not enough memory"
  18
  19
  20 #define luaM_reallocv(L,b,on,n,e) \
  21         ((cast(size_t, (n)+1) <= MAX_SIZET/(e)) ?  /* +1 to avoid warnings */ \
  22                 luaM_realloc_(L, (b), (on)*(e), (n)*(e)) : \
  23                 luaM_toobig(L))
  24
  25 #define luaM_freemem(L, b, s)   luaM_realloc_(L, (b), (s), 0)
  26 #define luaM_free(L, b)         luaM_realloc_(L, (b), sizeof(*(b)), 0)
  27 #define luaM_freearray(L, b, n, t)   luaM_reallocv(L, (b), n, 0, sizeof(t))
  28
  29 #define luaM_malloc(L,t)        luaM_realloc_(L, NULL, 0, (t))
  30 #define luaM_new(L,t)           cast(t *, luaM_malloc(L, sizeof(t)))
  31 #define luaM_newvector(L,n,t) \
  32                 cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t)))
  33
  34 #define luaM_growvector(L,v,nelems,size,t,limit,e) \
  35           if ((nelems)+1 > (size)) \
  36             ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e)))
  37
  38 #define luaM_reallocvector(L, v,oldn,n,t) \
  39    ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))
  40
  41
  42 LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,
  43                                                           size_t size);
  44 LUAI_FUNC void *luaM_toobig (lua_State *L);
  45 LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size,
  46                                size_t size_elem, int limit,
  47                                const char *errormsg);
  48
  49 #endif
  50