From 5c9b5ac72d1a7d8326f234d5a2fb6ca5be1070e6 Mon Sep 17 00:00:00 2001
From: Corinna Vinschen <corinna@vinschen.de>
Date: Fri, 18 Mar 2005 09:46:30 +0000
Subject: [PATCH] 	* libc/include/machine/setjmp.h (sigsetjmp): Use GCC
 extension to 	evaluate first parameter only once. 	(siglongjmp): Ditto.

---
 newlib/ChangeLog                     |  6 ++++++
 newlib/libc/include/machine/setjmp.h | 23 +++++++++++++++++++++++
 2 files changed, 29 insertions(+)

diff --git a/newlib/ChangeLog b/newlib/ChangeLog
index 34986d349..20db001e8 100644
--- a/newlib/ChangeLog
+++ b/newlib/ChangeLog
@@ -1,3 +1,9 @@
+2005-03-18  Corinna Vinschen  <corinna@vinschen.de>
+
+	* libc/include/machine/setjmp.h (sigsetjmp): Use GCC extension to
+	evaluate first parameter only once.
+	(siglongjmp): Ditto.
+
 2005-03-17  Jeff Johnston  <jjohnstn@redhat.com>
 
 	* configure.in: Add new check to see if compiler supports
diff --git a/newlib/libc/include/machine/setjmp.h b/newlib/libc/include/machine/setjmp.h
index 7a61fcfea..fe05ee1ee 100644
--- a/newlib/libc/include/machine/setjmp.h
+++ b/newlib/libc/include/machine/setjmp.h
@@ -236,6 +236,27 @@ typedef int sigjmp_buf[_JBLEN+2];
 # define _CYGWIN_WORKING_SIGSETJMP
 #endif
 
+#if defined(__GNUC__)
+
+#define sigsetjmp(env, savemask) \
+            ({ \
+              sigjmp_buf *_sjbuf = &(env); \
+              ((*_sjbuf)[_SAVEMASK] = savemask,\
+              sigprocmask (SIG_SETMASK, 0, (sigset_t *)((*_sjbuf) + _SIGMASK)),\
+              setjmp (*_sjbuf)); \
+            })
+
+#define siglongjmp(env, val) \
+            ({ \
+              sigjmp_buf *_sjbuf = &(env); \
+              ((((*_sjbuf)[_SAVEMASK]) ? \
+               sigprocmask (SIG_SETMASK, (sigset_t *)((*_sjbuf) + _SIGMASK), 0)\
+               : 0), \
+               longjmp (*_sjbuf, val)); \
+            })
+
+#else /* !__GNUC__ */
+
 #define sigsetjmp(env, savemask) ((env)[_SAVEMASK] = savemask,\
                sigprocmask (SIG_SETMASK, 0, (sigset_t *) ((env) + _SIGMASK)),\
                setjmp (env))
@@ -244,6 +265,8 @@ typedef int sigjmp_buf[_JBLEN+2];
                sigprocmask (SIG_SETMASK, (sigset_t *) ((env) + _SIGMASK), 0):0),\
                longjmp (env, val))
 
+#endif
+
 #ifdef __cplusplus
 }
 #endif