1 files changed, 73 insertions, 0 deletions
diff --git a/lib/libc_r/uthread/uthread_sigwait.c b/lib/libc_r/uthread/uthread_sigwait.c
new file mode 100644
index 000000000000..4f95190e4216
--- /dev/null
+++ b/lib/libc_r/uthread/uthread_sigwait.c
@@ -0,0 +1,73 @@
+/*
+ * Copyright (c) 1997 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by John Birrell.
+ * 4. 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 REGENTS 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.
+ *
+ */
+#include <signal.h>
+#include <errno.h>
+#ifdef _THREAD_SAFE
+#include <pthread.h>
+#include "pthread_private.h"
+
+int
+sigwait(const sigset_t * set, int *sig)
+{
+	int ret;
+	int status;
+	sigset_t oset;
+
+	/* Block signals: */
+	_thread_kern_sig_block(&status);
+
+	/* Save the current sigmal mask: */
+	oset = _thread_run->sigmask;
+
+	/* Combine the caller's mask with the current one: */
+	_thread_run->sigmask |= *set;
+
+	/* Wait for a signal: */
+	_thread_kern_sched_state(PS_SIGWAIT, __FILE__, __LINE__);
+
+	/* Block signals again: */
+	_thread_kern_sig_block(NULL);
+
+	/* Return the signal number to the caller: */
+	*sig = _thread_run->signo;
+
+	/* Restore the signal mask: */
+	_thread_run->sigmask = oset;
+
+	/* Unblock signals: */
+	_thread_kern_sig_unblock(status);
+
+	/* Return the completion status: */
+	return (ret);
+}
+#endif