1 files changed, 89 insertions, 0 deletions
diff --git a/lib/libthr/thread/thr_resume_np.c b/lib/libthr/thread/thr_resume_np.c
new file mode 100644
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--- /dev/null
+++ b/lib/libthr/thread/thr_resume_np.c
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+/*
+ * 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 <errno.h>
+#include <pthread.h>
+#include <pthread_np.h>
+#include "un-namespace.h"
+
+#include "thr_private.h"
+
+__weak_reference(_pthread_resume_np, pthread_resume_np);
+__weak_reference(_pthread_resume_all_np, pthread_resume_all_np);
+
+static void resume_common(struct pthread *thread);
+
+/* Resume a thread: */
+int
+_pthread_resume_np(pthread_t thread)
+{
+	struct pthread *curthread = _get_curthread();
+	int ret;
+
+	/* Add a reference to the thread: */
+	if ((ret = _thr_find_thread(curthread, thread, /*include dead*/0)) == 0) {
+		/* Lock the threads scheduling queue: */
+		resume_common(thread);
+		THR_THREAD_UNLOCK(curthread, thread);
+	}
+	return (ret);
+}
+
+void
+_pthread_resume_all_np(void)
+{
+	struct pthread *curthread = _get_curthread();
+	struct pthread *thread;
+
+	/* Take the thread list lock: */
+	THREAD_LIST_RDLOCK(curthread);
+
+	TAILQ_FOREACH(thread, &_thread_list, tle) {
+		if (thread != curthread) {
+			THR_THREAD_LOCK(curthread, thread);
+			resume_common(thread);
+			THR_THREAD_UNLOCK(curthread, thread);
+		}
+	}
+
+	/* Release the thread list lock: */
+	THREAD_LIST_UNLOCK(curthread);
+}
+
+static void
+resume_common(struct pthread *thread)
+{
+	/* Clear the suspend flag: */
+	thread->flags &= ~THR_FLAGS_NEED_SUSPEND;
+	thread->cycle++;
+	_thr_umtx_wake(&thread->cycle, 1, 0);
+}