[src/riastradh-drm2]: src/sys/external/bsd/drm2/include/linux Add <linux/comp...

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/5b9626c679c9
branches:  riastradh-drm2
changeset: 788296:5b9626c679c9
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Wed Jul 24 03:07:28 2013 +0000

description:
Add <linux/completion.h>.

A completion is a synchronized waitable `done' flag.  Trivial
condvar/mutex/bool.

diffstat:

 sys/external/bsd/drm2/include/linux/completion.h |  91 ++++++++++++++++++++++++
 1 files changed, 91 insertions(+), 0 deletions(-)

diffs (95 lines):

diff -r cf7622959f6a -r 5b9626c679c9 sys/external/bsd/drm2/include/linux/completion.h
--- /dev/null   Thu Jan 01 00:00:00 1970 +0000
+++ b/sys/external/bsd/drm2/include/linux/completion.h  Wed Jul 24 03:07:28 2013 +0000
@@ -0,0 +1,91 @@
+/*     $NetBSD: completion.h,v 1.1.2.1 2013/07/24 03:07:28 riastradh Exp $     */
+
+/*-
+ * Copyright (c) 2013 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Taylor R. Campbell.
+ *
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
+ */
+
+#ifndef _LINUX_COMPLETION_H_
+#define _LINUX_COMPLETION_H_
+
+#include <sys/types.h>
+#include <sys/condvar.h>
+#include <sys/mutex.h>
+
+struct completion {
+       kmutex_t c_lock;
+       kcondvar_t c_cv;
+       bool c_done;
+};
+
+static inline void
+INIT_COMPLETION(struct completion *completion)
+{
+
+       mutex_enter(&completion->c_lock);
+       completion->c_done = false;
+       mutex_exit(&completion->c_lock);
+}
+
+static inline void
+init_completion(struct completion *completion)
+{
+
+       mutex_init(&completion->c_lock, MUTEX_DEFAULT, IPL_NONE);
+       cv_init(&completion->c_cv, "lnxcmplt");
+       completion->c_done = false;
+}
+
+static inline void
+complete_all(struct completion *completion)
+{
+
+       mutex_enter(&completion->c_lock);
+       completion->c_done = true;
+       cv_broadcast(&completion->c_cv);
+       mutex_exit(&completion->c_lock);
+}
+
+static inline int
+wait_for_completion_interruptible_timeout(struct completion *completion,
+    unsigned long ticks)
+{
+       int error = 0;
+
+       mutex_enter(&completion->c_lock);
+       while (!completion->c_done) {
+               error = cv_timedwait_sig(&completion->c_cv,
+                   &completion->c_lock, ticks);
+               if (error)
+                       break;
+       }
+       mutex_exit(&completion->c_lock);
+
+       return error;
+}
+
+#endif /* _LINUX_COMPLETION_H_ */