# HG changeset patch
# User Bruno Haible <bruno@clisp.org>
# Date 1214164448 -7200
# Node ID d7f97416cbe1d4b99f04d4c736a6e2640d6f4f86
# Parent  a8938b62a3687f2a818fcb0640e084e7b93a1447
Define SA_RESTART also for mingw.

diff -r a8938b62a368 -r d7f97416cbe1 ChangeLog
--- a/ChangeLog	Sun Jun 22 21:49:39 2008 +0200
+++ b/ChangeLog	Sun Jun 22 21:54:08 2008 +0200
@@ -1,5 +1,8 @@
 2008-06-22  Bruno Haible  <bruno@clisp.org>
 
+	* lib/signal.in.h (SA_RESTART): New macro.
+	* lib/sigaction.c: Update comment.
+
 	* m4/sigaction.m4 (gl_SIGACTION): Require gl_SIGNAL_H_DEFAULTS.
 
 	* m4/signalblocking.m4 (gl_PREREQ_SIG_HANDLER_H): New macro.
diff -r a8938b62a368 -r d7f97416cbe1 lib/sigaction.c
--- a/lib/sigaction.c	Sun Jun 22 21:49:39 2008 +0200
+++ b/lib/sigaction.c	Sun Jun 22 21:54:08 2008 +0200
@@ -35,11 +35,15 @@
    the situation by reading static storage in a signal handler, which
    POSIX warns is not generically async-signal-safe.  Oh well.
 
-   Additionally, SIGCHLD is not defined, so we don't implement
-   SA_NOCLDSTOP or SA_NOCLDWAIT; sigaltstack() is not present, so we
-   don't implement SA_ONSTACK; and siginterrupt() is not present, so
-   we don't implement SA_RESTART.  Supporting SA_SIGINFO is impossible
-   to do portably.
+   Additionally:
+     - We don't implement SA_NOCLDSTOP or SA_NOCLDWAIT, because SIGCHLD
+       is not defined.
+     - We don't implement SA_ONSTACK, because sigaltstack() is not present.
+     - We ignore SA_RESTART, because blocking Win32 calls are not interrupted
+       anyway when an asynchronous signal occurs, and the MSVCRT runtime
+       never sets errno to EINTR.
+     - We don't implement SA_SIGINFO because it is impossible to do so
+       portably.
 
    POSIX states that an application should not mix signal() and
    sigaction().  We support the use of signal() within the gnulib
diff -r a8938b62a368 -r d7f97416cbe1 lib/signal.in.h
--- a/lib/signal.in.h	Sun Jun 22 21:49:39 2008 +0200
+++ b/lib/signal.in.h	Sun Jun 22 21:54:08 2008 +0200
@@ -142,6 +142,7 @@
 /* Unsupported flags are not present.  */
 # define SA_RESETHAND 1
 # define SA_NODEFER 2
+# define SA_RESTART 4
 
 extern int sigaction (int, const struct sigaction *restrict,
                       struct sigaction *restrict);