1 files changed, 90 insertions, 0 deletions
diff --git a/lib/librthread/rthread_sig.c b/lib/librthread/rthread_sig.c
new file mode 100644
index 00000000000..5fcb9002e86
--- /dev/null
+++ b/lib/librthread/rthread_sig.c
@@ -0,0 +1,90 @@
+/*	$OpenBSD: rthread_sig.c,v 1.1 2005/12/03 18:16:19 tedu Exp $ */
+/*
+ * Copyright (c) 2004 Ted Unangst <tedu@openbsd.org>
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+/*
+ * signals
+ */
+
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+
+#include <machine/spinlock.h>
+
+#include <stdlib.h>
+#include <unistd.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+
+#include <pthread.h>
+
+#include "rthread.h"
+
+int thrwakeup(long);
+int thrsleep(long, int, void *);
+int thrsigdivert(const sigset_t *);
+
+int
+pthread_sigmask(int how, const sigset_t *set, sigset_t *oset)
+{
+	return (sigprocmask(how, set, oset));
+}
+
+/* 
+ * implementation of sigwait:
+ * 1.  we install a handler for each masked signal.
+ * 2.  we inform the kernel we are interested in this signal set.
+ * 3.  sleep.  the handler will wake us up.
+ *
+ * this is atomic because the kernel will only divert one signal
+ * to a thread until it asks for more.
+ */
+static void
+sigwait_handler(int sig)
+{
+	pthread_t self = pthread_self();
+	self->sigpend = sig;
+	thrwakeup((long)&self->sigpend);
+}
+
+typedef void (*sigfn)(int);
+
+int
+sigwait(const sigset_t *set, int *sig)
+{
+	int i;
+	sigset_t mask = *set;
+	pthread_t self = pthread_self();
+	sigfn oldhandlers[NSIG];
+
+	for (i = 0; i < NSIG; i++) {
+		if (mask & (1 << i))
+			oldhandlers[i] = signal(i, sigwait_handler);
+	}
+
+	thrsigdivert(set);
+	thrsleep((long)&self->sigpend, 0, NULL);
+
+	for (i = 0; i < NSIG; i++) {
+		if (mask & (1 << i))
+			signal(i, oldhandlers[i]);
+	}
+	*sig = self->sigpend;
+	return (0);
+}