From ed1a95dc2529af31b0c622da451334a12ef6d436 Mon Sep 17 00:00:00 2001
From: Jeff Johnston <jjohnstn@redhat.com>
Date: Thu, 22 Jan 2004 22:06:57 +0000
Subject: [PATCH] 2004-01-22  Thomas Pfaff  <tpfaff@gmx.net>

        * libc/stdio/findfp.c (__sfp): Protect global FILE pointer list
        by a lock when newlib is multithreaded.
---
 newlib/ChangeLog           |  5 +++++
 newlib/libc/stdio/findfp.c | 12 ++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index a3e0ff9a9..0421e7ee2 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,8 @@
+2004-01-22  Thomas Pfaff  <tpfaff@gmx.net>
+
+	* libc/stdio/findfp.c (__sfp): Protect global FILE pointer list
+	by a lock when newlib is multithreaded. 
+
 2004-01-21  Jeff Johnston  <jjohnstn@redhat.com>
 
 	* libc/stdlib/mbrtowc.c (_mbrtowc_r): Fix case where s is null
diff --git a/newlib/libc/stdio/findfp.c b/newlib/libc/stdio/findfp.c
index aff231ed4..0ea7e31a2 100644
--- a/newlib/libc/stdio/findfp.c
+++ b/newlib/libc/stdio/findfp.c
@@ -86,6 +86,12 @@ __sfp (d)
   int n;
   struct _glue *g;
 
+#ifndef __SINGLE_THREAD__
+  __LOCK_INIT(static, lock);
+
+  __lock_acquire(lock); 
+#endif
+
   if (!_GLOBAL_REENT->__sdidinit)
     __sinit (_GLOBAL_REENT);
   for (g = &_GLOBAL_REENT->__sglue;; g = g->_next)
@@ -97,11 +103,17 @@ __sfp (d)
 	  (g->_next = __sfmoreglue (d, NDYNAMIC)) == NULL)
 	break;
     }
+#ifndef __SINGLE_THREAD__
+  __lock_release(lock); 
+#endif
   d->_errno = ENOMEM;
   return NULL;
 
 found:
   fp->_flags = 1;		/* reserve this slot; caller sets real flags */
+#ifndef __SINGLE_THREAD__
+  __lock_release(lock); 
+#endif
   fp->_p = NULL;		/* no current pointer */
   fp->_w = 0;			/* nothing to read or write */
   fp->_r = 0;