external/mit/lua/dist/src/lmem.h

   1 /*      $NetBSD: lmem.h,v 1.1.1.2 2012/03/15 00:08:06 alnsn Exp $       */
   2
   3 /*
   4 ** $Id: lmem.h,v 1.1.1.2 2012/03/15 00:08:06 alnsn Exp $
   5 ** Interface to Memory Manager
   6 ** See Copyright Notice in lua.h
   7 */
   8
   9 #ifndef lmem_h
  10 #define lmem_h
  11
  12
  13 #include <stddef.h>
  14
  15 #include "llimits.h"
  16 #include "lua.h"
  17
  18 #define MEMERRMSG       "not enough memory"
  19
  20
  21 #define luaM_reallocv(L,b,on,n,e) \
  22         ((cast(size_t, (n)+1) <= MAX_SIZET/(e)) ?  /* +1 to avoid warnings */ \
  23                 luaM_realloc_(L, (b), (on)*(e), (n)*(e)) : \
  24                 luaM_toobig(L))
  25
  26 #define luaM_freemem(L, b, s)   luaM_realloc_(L, (b), (s), 0)
  27 #define luaM_free(L, b)         luaM_realloc_(L, (b), sizeof(*(b)), 0)
  28 #define luaM_freearray(L, b, n, t)   luaM_reallocv(L, (b), n, 0, sizeof(t))
  29
  30 #define luaM_malloc(L,t)        luaM_realloc_(L, NULL, 0, (t))
  31 #define luaM_new(L,t)           cast(t *, luaM_malloc(L, sizeof(t)))
  32 #define luaM_newvector(L,n,t) \
  33                 cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t)))
  34
  35 #define luaM_growvector(L,v,nelems,size,t,limit,e) \
  36           if ((nelems)+1 > (size)) \
  37             ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e)))
  38
  39 #define luaM_reallocvector(L, v,oldn,n,t) \
  40    ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t))))
  41
  42
  43 LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,
  44                                                           size_t size);
  45 LUAI_FUNC void *luaM_toobig (lua_State *L);
  46 LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size,
  47                                size_t size_elem, int limit,
  48                                const char *errormsg);
  49
  50 #endif
  51