From b4d98c68558acbe9782e24963999f922d52ccf28 Mon Sep 17 00:00:00 2001
From: tjr <tjr@FreeBSD.org>
Date: Wed, 17 Mar 2004 01:43:08 +0000
Subject: Re-add macro versions of getc(), getchar(), putc(), putchar(),
 feof(), ferror(), fileno() and clearerr(), using the value of __isthreaded to
 decide between the fast inline single-threaded code and the more general
 function equivalent. This gives most of the performance benefits of the old
 unsafe macros while preserving thread safety.

---
 include/stdio.h          | 16 ++++++++++++++++
 lib/libc/stdio/feof.c    |  8 ++------
 lib/libc/stdio/ferror.c  |  8 ++------
 lib/libc/stdio/fileno.c  |  8 ++------
 lib/libc/stdio/getc.c    |  2 ++
 lib/libc/stdio/putc.c    | 10 ++--------
 lib/libc/stdio/putchar.c | 10 ++--------
 7 files changed, 28 insertions(+), 34 deletions(-)

diff --git a/include/stdio.h b/include/stdio.h
index 58f4995..90428b9 100644
--- a/include/stdio.h
+++ b/include/stdio.h
@@ -416,6 +416,22 @@ static __inline int __sputc(int _c, FILE *_p) {
 #define	__sclearerr(p)	((void)((p)->_flags &= ~(__SERR|__SEOF)))
 #define	__sfileno(p)	((p)->_file)
 
+extern int __isthreaded;
+
+#define	feof(p)		(!__isthreaded ? __sfeof(p) : feof(p))
+#define	ferror(p)	(!__isthreaded ? __sferror(p) : ferror(p))
+#define	clearerr(p)	(!__isthreaded ? __sclearerr(p) : clearerr(p))
+
+#if __POSIX_VISIBLE
+#define	fileno(p)	(!__isthreaded ? __sfileno(p) : fileno(p))
+#endif
+
+#define	getc(fp)	(!__isthreaded ? __sgetc(fp) : getc(fp))
+#define	putc(x, fp)	(!__isthreaded ? __sputc(x, fp) : putc(x, fp))
+
+#define	getchar()	getc(stdin)
+#define	putchar(x)	putc(x, stdout)
+
 #if __BSD_VISIBLE
 /*
  * See ISO/IEC 9945-1 ANSI/IEEE Std 1003.1 Second Edition 1996-07-12
diff --git a/lib/libc/stdio/feof.c b/lib/libc/stdio/feof.c
index 6ad14aa..0bb12be 100644
--- a/lib/libc/stdio/feof.c
+++ b/lib/libc/stdio/feof.c
@@ -45,12 +45,8 @@ __FBSDID("$FreeBSD$");
 #include "un-namespace.h"
 #include "libc_private.h"
 
-/*
- * feof has traditionally been a macro in <stdio.h>.  That is no
- * longer true because it needs to be thread-safe.
- *
- * #undef feof
- */
+#undef feof
+
 int
 feof(FILE *fp)
 {
diff --git a/lib/libc/stdio/ferror.c b/lib/libc/stdio/ferror.c
index c0fdecd..5d4c187 100644
--- a/lib/libc/stdio/ferror.c
+++ b/lib/libc/stdio/ferror.c
@@ -45,12 +45,8 @@ __FBSDID("$FreeBSD$");
 #include "un-namespace.h"
 #include "libc_private.h"
 
-/*
- * ferror has traditionally been a macro in <stdio.h>.  That is no
- * longer true because it needs to be thread-safe.
- *
- * #undef ferror
- */
+#undef ferror
+
 int
 ferror(FILE *fp)
 {
diff --git a/lib/libc/stdio/fileno.c b/lib/libc/stdio/fileno.c
index d7bf93d..51c0464 100644
--- a/lib/libc/stdio/fileno.c
+++ b/lib/libc/stdio/fileno.c
@@ -45,12 +45,8 @@ __FBSDID("$FreeBSD$");
 #include "un-namespace.h"
 #include "libc_private.h"
 
-/*
- * fileno has traditionally been a macro in <stdio.h>.  That is
- * no longer true because it needs to be thread-safe.
- *
- * #undef fileno
- */
+#undef fileno
+
 int
 fileno(FILE *fp)
 {
diff --git a/lib/libc/stdio/getc.c b/lib/libc/stdio/getc.c
index 8fb3057..5732568 100644
--- a/lib/libc/stdio/getc.c
+++ b/lib/libc/stdio/getc.c
@@ -46,6 +46,8 @@ __FBSDID("$FreeBSD$");
 #include "libc_private.h"
 #include "local.h"
 
+#undef getc
+
 int
 getc(FILE *fp)
 {
diff --git a/lib/libc/stdio/putc.c b/lib/libc/stdio/putc.c
index 95a9cac..b42f878 100644
--- a/lib/libc/stdio/putc.c
+++ b/lib/libc/stdio/putc.c
@@ -46,14 +46,8 @@ __FBSDID("$FreeBSD$");
 #include "local.h"
 #include "libc_private.h"
 
-/*
- * putc has traditionally been a macro in <stdio.h>.  That is no
- * longer true because POSIX requires it to be thread-safe.  POSIX
- * does define putc_unlocked() which is defined as a macro and is
- * probably what you want to use instead.
- *
- * #undef putc
- */
+#undef putc
+
 int
 putc(c, fp)
 	int c;
diff --git a/lib/libc/stdio/putchar.c b/lib/libc/stdio/putchar.c
index 5a775ec..fe97d01 100644
--- a/lib/libc/stdio/putchar.c
+++ b/lib/libc/stdio/putchar.c
@@ -46,14 +46,8 @@ __FBSDID("$FreeBSD$");
 #include "local.h"
 #include "libc_private.h"
 
-/*
- * putchar has traditionally been a macro in <stdio.h>.  That is no
- * longer true because POSIX requires it to be thread-safe.  POSIX
- * does define putchar_unlocked() which is defined as a macro and is
- * probably what you want to use instead.
- *
- * #undef putchar
- */
+#undef putchar
+
 /*
  * A subroutine version of the macro putchar
  */
-- 
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