1 files changed, 127 insertions, 0 deletions
diff --git a/lib/libkse/thread/thr_join.c b/lib/libkse/thread/thr_join.c
new file mode 100644
index 0000000..155dc64
--- /dev/null
+++ b/lib/libkse/thread/thr_join.c
@@ -0,0 +1,127 @@
+/*
+ * 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>
+#ifdef _THREAD_SAFE
+#include <pthread.h>
+#include "pthread_private.h"
+
+int
+pthread_join(pthread_t pthread, void **thread_return)
+{
+	int ret = 0;
+	pthread_t pthread1 = NULL;
+ 
+	_thread_enter_cancellation_point();
+
+	/* Check if the caller has specified an invalid thread: */
+	if (pthread == NULL || pthread->magic != PTHREAD_MAGIC) {
+		/* Invalid thread: */
+		_thread_leave_cancellation_point();
+		return(EINVAL);
+	}
+
+	/* Check if the caller has specified itself: */
+	if (pthread == _thread_run) {
+		/* Avoid a deadlock condition: */
+		_thread_leave_cancellation_point();
+		return(EDEADLK);
+	}
+
+	/*
+	 * Find the thread in the list of active threads or in the
+	 * list of dead threads:
+	 */
+	if (_find_thread(pthread) == 0 ||
+	    _find_dead_thread(pthread) == 0)
+		pthread1  = pthread;
+
+	if (pthread1 == NULL)
+		/* Return an error: */
+		ret = ESRCH;
+
+	/* Check if this thread has been detached: */
+	else if ((pthread->attr.flags & PTHREAD_DETACHED) != 0)
+		/* Return an error: */
+		ret = ESRCH;
+
+	/* Check if the thread is not dead: */
+	else if (pthread->state != PS_DEAD) {
+		/* Clear the interrupted flag: */
+		_thread_run->interrupted = 0;
+
+		/*
+		 * Protect against being context switched out while
+		 * adding this thread to the join queue.
+		 */
+		_thread_kern_sig_defer();
+
+		/* Add the running thread to the join queue: */
+		TAILQ_INSERT_TAIL(&(pthread->join_queue), _thread_run, qe);
+
+		/* Schedule the next thread: */
+		_thread_kern_sched_state(PS_JOIN, __FILE__, __LINE__);
+
+		if (_thread_run->interrupted != 0)
+			TAILQ_REMOVE(&(pthread->join_queue), _thread_run, qe);
+
+		_thread_kern_sig_undefer();
+
+		if ((_thread_run->cancelflags & PTHREAD_CANCEL_NEEDED) != 0) {
+			_thread_run->cancelflags &= ~PTHREAD_CANCEL_NEEDED;
+			_thread_exit_cleanup();
+			pthread_exit(PTHREAD_CANCELED);
+		}
+
+		/* Check if the thread is not detached: */
+		if ((pthread->attr.flags & PTHREAD_DETACHED) == 0) {
+			/* Check if the return value is required: */
+			if (thread_return)
+				/* Return the thread's return value: */
+				*thread_return = pthread->ret;
+		}
+		else
+			/* Return an error: */
+			ret = ESRCH;
+
+	/* Check if the return value is required: */
+	} else if (thread_return != NULL)
+		/* Return the thread's return value: */
+		*thread_return = pthread->ret;
+
+	_thread_leave_cancellation_point();
+
+	/* Return the completion status: */
+	return (ret);
+}
+#endif