/*** $Id: lmem.h,v 1.43 2014/12/19 17:26:14 roberto Exp $** Interface to Memory Manager** See Copyright Notice in lua.h*/ #ifndef lmem_h#define lmem_h  #include <stddef.h> #include "llimits.h"#include "lua.h"  /*** This macro reallocs a vector 'b' from 'on' to 'n' elements, where** each element has size 'e'. In case of arithmetic overflow of the** product 'n'*'e', it raises an error (calling 'luaM_toobig'). Because** 'e' is always constant, it avoids the runtime division MAX_SIZET/(e).**** (The macro is somewhat complex to avoid warnings:  The 'sizeof'** comparison avoids a runtime comparison when overflow cannot occur.** The compiler should be able to optimize the real test by itself, but** when it does it, it may give a warning about "comparison is always** false due to limited range of data type"; the +1 tricks the compiler,** avoiding this warning but also this optimization.)*/#define luaM_reallocv(L,b,on,n,e) \  (((sizeof(n) >= sizeof(size_t) && cast(size_t, (n)) + 1 > MAX_SIZET/(e)) \      ? luaM_toobig(L) : cast_void(0)) , \   luaM_realloc_(L, (b), (on)*(e), (n)*(e))) /*** Arrays of chars do not need any test*/#define luaM_reallocvchar(L,b,on,n)  \    cast(char *, luaM_realloc_(L, (b), (on)*sizeof(char), (n)*sizeof(char))) #define luaM_freemem(L, b, s)	luaM_realloc_(L, (b), (s), 0)#define luaM_free(L, b)		luaM_realloc_(L, (b), sizeof(*(b)), 0)#define luaM_freearray(L, b, n)   luaM_realloc_(L, (b), (n)*sizeof(*(b)), 0) #define luaM_malloc(L,s)	luaM_realloc_(L, NULL, 0, (s))#define luaM_new(L,t)		cast(t *, luaM_malloc(L, sizeof(t)))#define luaM_newvector(L,n,t) \		cast(t *, luaM_reallocv(L, NULL, 0, n, sizeof(t))) #define luaM_newobject(L,tag,s)	luaM_realloc_(L, NULL, tag, (s)) #define luaM_growvector(L,v,nelems,size,t,limit,e) \          if ((nelems)+1 > (size)) \            ((v)=cast(t *, luaM_growaux_(L,v,&(size),sizeof(t),limit,e))) #define luaM_reallocvector(L, v,oldn,n,t) \   ((v)=cast(t *, luaM_reallocv(L, v, oldn, n, sizeof(t)))) LUAI_FUNC l_noret luaM_toobig (lua_State *L); /* not to be called directly */LUAI_FUNC void *luaM_realloc_ (lua_State *L, void *block, size_t oldsize,                                                          size_t size);LUAI_FUNC void *luaM_growaux_ (lua_State *L, void *block, int *size,                               size_t size_elem, int limit,                               const char *what); #endif