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Remove most volatility from readtoken1() restoring execution

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speed to approximately where it was before the changes made
in version 1.96 (which assumed this would eventually happen.)
This commit is contained in:
christos 2016-03-08 14:10:04 +00:00
parent dec2ca90b9
commit b506e0ff4c
1 changed files with 15 additions and 13 deletions
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28
bin/sh/parser.c
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@ -1,4 +1,4 @@
/* $NetBSD: parser.c,v 1.102 2016/02/28 23:12:23 christos Exp $ */
/* $NetBSD: parser.c,v 1.103 2016/03/08 14:10:04 christos Exp $ */
/*-
* Copyright (c) 1991, 1993
@ -37,7 +37,7 @@
#if 0
static char sccsid[] = "@(#)parser.c 8.7 (Berkeley) 5/16/95";
#else
__RCSID("$NetBSD: parser.c,v 1.102 2016/02/28 23:12:23 christos Exp $");
__RCSID("$NetBSD: parser.c,v 1.103 2016/03/08 14:10:04 christos Exp $");
#endif
#endif /* not lint */
@ -971,7 +971,8 @@ struct tokenstate {
#define QS 0x10
#define LEVELS_PER_BLOCK 8
#define VSS volatile struct statestack
#define VSS struct statestack
#define VVSS volatile VSS
struct statestack {
VSS *prev; /* previous block in list */
@ -979,13 +980,13 @@ struct statestack {
struct tokenstate tokenstate[LEVELS_PER_BLOCK];
};
static inline volatile struct tokenstate *
static inline struct tokenstate *
currentstate(VSS *stack)
{
return &stack->tokenstate[stack->cur];
}
static inline volatile struct tokenstate *
static inline struct tokenstate *
prevstate(VSS *stack)
{
if (stack->cur != 0)
@ -998,7 +999,7 @@ prevstate(VSS *stack)
static inline VSS *
bump_state_level(VSS *stack)
{
volatile struct tokenstate *os, *ts;
struct tokenstate *os, *ts;
os = currentstate(stack);
@ -1079,21 +1080,22 @@ cleanup_state_stack(VSS *stack)
#define varnest (currentstate(stack)->ts_varnest)
#define arinest (currentstate(stack)->ts_arinest)
#define quoted (currentstate(stack)->ts_quoted)
#define TS_PUSH() (stack = bump_state_level(stack))
#define TS_POP() (stack = drop_state_level(stack))
#define TS_PUSH() (vstack = stack = bump_state_level(stack))
#define TS_POP() (vstack = stack = drop_state_level(stack))
STATIC int
readtoken1(int firstc, char const *syn, char *eofmark, int striptabs)
{
int c = firstc;
char * volatile out;
char * out;
int len;
char line[EOFMARKLEN + 1];
struct nodelist *bqlist;
volatile int quotef;
volatile int oldstyle;
int quotef;
int oldstyle;
VSS static_stack;
VSS *stack = &static_stack;
VVSS *vstack = stack;
stack->prev = NULL;
stack->cur = 0;
@ -1556,7 +1558,7 @@ parsebackq: {
struct nodelist **nlpp;
int savepbq;
union node *n;
char *volatile str = NULL;
char *str = NULL;
struct jmploc jmploc;
struct jmploc *volatile savehandler = NULL;
int savelen;
@ -1566,7 +1568,7 @@ parsebackq: {
if (setjmp(jmploc.loc)) {
if (str)
ckfree(str);
cleanup_state_stack(stack);
cleanup_state_stack(__UNVOLATILE(vstack));
parsebackquote = 0;
handler = savehandler;
longjmp(handler->loc, 1);