1 files changed, 90 insertions, 0 deletions
diff --git a/lib/libkse/thread/thr_detach.c b/lib/libkse/thread/thr_detach.c
new file mode 100644
index 000000000000..298fdb41b0db
--- /dev/null
+++ b/lib/libkse/thread/thr_detach.c
@@ -0,0 +1,90 @@
+/*
+ * 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. 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 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 <errno.h>
+#include <pthread.h>
+#include "pthread_private.h"
+
+__weak_reference(_pthread_detach, pthread_detach);
+
+int
+_pthread_detach(pthread_t pthread)
+{
+	int             rval = 0;
+
+	/* Check for invalid calling parameters: */
+	if (pthread == NULL || pthread->magic != PTHREAD_MAGIC)
+		/* Return an invalid argument error: */
+		rval = EINVAL;
+
+	/* Check if the thread has not been detached: */
+	else if ((pthread->attr.flags & PTHREAD_DETACHED) == 0) {
+		/* Flag the thread as detached: */
+		pthread->attr.flags |= PTHREAD_DETACHED;
+
+		/*
+		 * Defer signals to protect the scheduling queues from
+		 * access by the signal handler:
+		 */
+		_thread_kern_sig_defer();
+
+		/* Check if there is a joiner: */
+		if (pthread->joiner != NULL) {
+			struct pthread	*joiner = pthread->joiner;
+
+			/* Make the thread runnable: */
+			PTHREAD_NEW_STATE(joiner, PS_RUNNING);
+
+			/* Set the return value for the woken thread: */
+			joiner->join_status.error = ESRCH;
+			joiner->join_status.ret = NULL;
+			joiner->join_status.thread = NULL;
+
+			/*
+			 * Disconnect the joiner from the thread being detached:
+			 */
+			pthread->joiner = NULL;
+		}
+
+		/*
+		 * Undefer and handle pending signals, yielding if a
+		 * scheduling signal occurred while in the critical region.
+		 */
+		_thread_kern_sig_undefer();
+	} else
+		/* Return an error: */
+		rval = EINVAL;
+
+	/* Return the completion status: */
+	return (rval);
+}