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using 'offsetof' to compute the size of parts of a structure

This commit is contained in:
Roberto Ierusalimschy 2018-02-25 10:40:00 -03:00
parent 75efc6722b
commit 38d3bc8909
1 changed files with 5 additions and 5 deletions
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10
lfunc.h
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@ -1,5 +1,5 @@
/*
** $Id: lfunc.h,v 2.18 2017/06/29 15:06:44 roberto Exp roberto $
** $Id: lfunc.h,v 2.19 2018/01/28 15:13:26 roberto Exp roberto $
** Auxiliary functions to manipulate prototypes and closures
** See Copyright Notice in lua.h
*/
@ -11,11 +11,11 @@
#include "lobject.h"
#define sizeCclosure(n) (cast_int(sizeof(CClosure)) + \
cast_int(sizeof(TValue)*((n)-1)))
#define sizeCclosure(n) (cast_int(offsetof(CClosure, upvalue)) + \
cast_int(sizeof(TValue)) * (n))
#define sizeLclosure(n) (cast_int(sizeof(LClosure)) + \
cast_int(sizeof(TValue *)*((n)-1)))
#define sizeLclosure(n) (cast_int(offsetof(LClosure, upvals)) + \
cast_int(sizeof(TValue *)) * (n))
/* test whether thread is in 'twups' list */