root/lib/lua/lmem.h

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INCLUDED FROM

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