src/lmem.h

   1 /*
   2 ** $Id: lmem.h,v 1.26 2002/05/01 20:40:42 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 void *luaM_realloc (lua_State *L, void *oldblock, lu_mem oldsize, lu_mem size);
  20
  21 void *luaM_growaux (lua_State *L, void *block, int *size, int size_elem,
  22                     int limit, const char *errormsg);
  23
  24 #define luaM_free(L, b, s)      luaM_realloc(L, (b), (s), 0)
  25 #define luaM_freelem(L, b)      luaM_realloc(L, (b), sizeof(*(b)), 0)
  26 #define luaM_freearray(L, b, n, t)      luaM_realloc(L, (b), \
  27                                       cast(lu_mem, n)*cast(lu_mem, sizeof(t)), 0)
  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)  cast(t *, luaM_malloc(L, \
  32                                          cast(lu_mem, n)*cast(lu_mem, 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_realloc(L, v,cast(lu_mem, oldn)*cast(lu_mem, sizeof(t)), \
  40                                     cast(lu_mem, n)*cast(lu_mem, sizeof(t)))))
  41
  42
  43 #endif
  44