Initial revision
authorroland <roland>
Sat, 1 Feb 1992 20:02:07 +0000 (20:02 +0000)
committerroland <roland>
Sat, 1 Feb 1992 20:02:07 +0000 (20:02 +0000)
sysdeps/mach/hurd/sigprocmask.c [new file with mode: 0644]

diff --git a/sysdeps/mach/hurd/sigprocmask.c b/sysdeps/mach/hurd/sigprocmask.c
new file mode 100644 (file)
index 0000000..f9c70b0
--- /dev/null
@@ -0,0 +1,92 @@
+/* Copyright (C) 1991 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <ansidecl.h>
+#include <errno.h>
+#include <signal.h>
+
+
+/* If SET is not NULL, modify the current set of blocked signals
+   according to HOW, which may be SIG_BLOCK, SIG_UNBLOCK or SIG_SETMASK.
+   If OSET is not NULL, store the old set of blocked signals in *OSET.  */
+int
+DEFUN(__sigprocmask, (how, set, oset),
+      int how AND CONST sigset_t *set AND sigset_t *oset)
+{
+  struct _hurd_sigstate *ss;
+  sigset_t old, new;
+
+  if (set != NULL)
+    new = *set;
+
+  ss = _hurd_thread_sigstate (__mach_thread_self ());
+  old = ss->blocked;
+
+  if (set != NULL)
+    {
+      sigset_t pending;
+      int i;
+
+      switch (how)
+       {
+       case SIG_BLOCK:
+         ss->blocked |= new;
+         break;
+
+       case SIG_UNBLOCK:
+         ss->blocked &= ~new;
+         break;
+
+       case SIG_SETMASK:
+         ss->blocked = new;
+         break;
+
+       default:
+         __mutex_unlock (&ss->lock);
+         errno = EINVAL;
+         return -1;
+       }
+
+      ss->blocked &= ~_SIG_CANT_BLOCK;
+
+      pending = ss->pending & ~ss->blocked;
+      for (i = 1; i < NSIG; ++i)
+       if (pending & __sigmask (i))
+         {
+           /* Post the first pending signal.
+              This call will deal with the remaining pending signals.
+              The call releases SS->lock.  */
+           int ignore;
+           __sigdelmember (i, &ss->pending);
+           (void) _hurd_internal_post_signal (MACH_PORT_NULL,
+                                              ss,
+                                              signo,
+                                              ss->sigcodes[signo],
+                                              0, 0, &ignore,
+                                              NULL);
+           break;
+         }
+    }
+
+  __mutex_unlock (&ss->lock);
+
+  if (oset != NULL)
+    *oset = old;
+
+  return 0;
+}