small change to avoid bug in some versions of the clang compiler

This commit is contained in:
Roberto Ierusalimschy 2014-09-26 11:09:21 -03:00
parent 8ede2c353c
commit 56699cd603
1 changed files with 7 additions and 2 deletions

View File

@ -1,5 +1,5 @@
/*
** $Id: liolib.c,v 2.127 2014/06/30 19:48:08 roberto Exp roberto $
** $Id: liolib.c,v 2.128 2014/07/29 16:01:00 roberto Exp roberto $
** Standard I/O (and system) library
** See Copyright Notice in lua.h
*/
@ -193,9 +193,14 @@ static LStream *newprefile (lua_State *L) {
}
/*
** Calls the 'close' function from a file handle. The 'volatile' avoids
** a bug in some verisions of the Clang compiler (e.g., clang 3.0 for
** 32 bits).
*/
static int aux_close (lua_State *L) {
LStream *p = tolstream(L);
lua_CFunction cf = p->closef;
volatile lua_CFunction cf = p->closef;
p->closef = NULL; /* mark stream as closed */
return (*cf)(L); /* close it */
}