1 files changed, 109 insertions, 0 deletions
diff --git a/lib/libkse/thread/thr_sigsuspend.c b/lib/libkse/thread/thr_sigsuspend.c
new file mode 100644
index 0000000..a6ef350
--- /dev/null
+++ b/lib/libkse/thread/thr_sigsuspend.c
@@ -0,0 +1,109 @@
+/*
+ * Copyright (c) 1995 John Birrell <jb@cimlogic.com.au>.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+
+#include "namespace.h"
+#include <sys/types.h>
+#include <sys/signalvar.h>
+#include <errno.h>
+#include <pthread.h>
+#include <signal.h>
+#include <string.h>
+#include "un-namespace.h"
+#include "thr_private.h"
+
+int	__sigsuspend(const sigset_t * set);
+
+__weak_reference(__sigsuspend, sigsuspend);
+
+int
+_sigsuspend(const sigset_t *set)
+{
+	struct pthread	*curthread = _get_curthread();
+	sigset_t	oldmask, newmask, tempset;
+	int             ret = -1;
+
+	if (curthread->attr.flags & PTHREAD_SCOPE_SYSTEM)
+		return (__sys_sigsuspend(set));
+
+	/* Check if a new signal set was provided by the caller: */
+	if (set != NULL) {
+		newmask = *set;
+		SIG_CANTMASK(newmask);
+		THR_LOCK_SWITCH(curthread);
+
+		/* Save current sigmask: */
+		oldmask = curthread->sigmask;
+		curthread->oldsigmask = &oldmask;
+
+		/* Change the caller's mask: */
+		curthread->sigmask = newmask;
+		tempset = curthread->sigpend;
+		SIGSETNAND(tempset, newmask);
+		if (SIGISEMPTY(tempset)) {
+			THR_SET_STATE(curthread, PS_SIGSUSPEND);
+			/* Wait for a signal: */
+			_thr_sched_switch_unlocked(curthread);
+		} else {
+			curthread->check_pending = 1;
+			THR_UNLOCK_SWITCH(curthread);
+			/* check pending signal I can handle: */
+			_thr_sig_check_pending(curthread);
+		}
+		if ((curthread->cancelflags & THR_CANCELLING) != 0)
+			curthread->oldsigmask = NULL;
+		else {
+			THR_ASSERT(curthread->oldsigmask == NULL,
+		 	          "oldsigmask is not cleared");
+		}
+
+		/* Always return an interrupted error: */
+		errno = EINTR;
+	} else {
+		/* Return an invalid argument error: */
+		errno = EINVAL;
+	}
+
+	/* Return the completion status: */
+	return (ret);
+}
+
+int
+__sigsuspend(const sigset_t * set)
+{
+	struct pthread *curthread = _get_curthread();
+	int		ret;
+
+	_thr_cancel_enter(curthread);
+	ret = _sigsuspend(set);
+	_thr_cancel_leave(curthread, 1);
+
+	return (ret);
+}